Derivative works — US Patent 10596517

The search results confirm the existence of US patent 10596517B2, titled "Sorbents for the oxidation and removal of mercury." The provided text aligns with the Google Patents abstract and description for this patent.

I will now proceed with generating the defensive disclosure document, focusing on the derivative variations for each independent claim.

Defensive Disclosure Document for US Patent 10596517

Patent Title: Sorbents for the oxidation and removal of mercury
Patent Number: US10596517
Date of Analysis: 2026-05-17

This document outlines derivative variations and combination prior art scenarios for US Patent 10596517, aiming to establish prior art for potential future incremental improvements by competitors.

Independent Claim 1: Promoted Carbon Sorbent Composition

"A promoted carbon sorbent comprising a base activated carbon that has reacted with a promoter selected from the group consisting of halides, halogens, and combinations thereof, such that the reaction product is effective for the removal of mercury from a gas stream."

Derivative Variations for Claim 1

Material & Component Substitution: Alternative Carbonaceous & Inorganic Bases
- Enabling Description: A promoted sorbent comprising a biochar derived from agricultural waste (e.g., corn stover, rice husks) activated by pyrolysis at 600-800°C under an inert atmosphere, followed by impregnation with elemental iodine (I2) in a non-aqueous solvent such as toluene at 80°C for 2 hours. The resulting iodinated biochar exhibits enhanced mercury capture due to both the surface functionalization and the porous structure of the biochar. Alternatively, a metal-organic framework (MOF) material, specifically ZIF-8 (Zeolitic Imidazolate Framework-8), could serve as the base, synthesized hydrothermally and then functionalized with a phosphobromide, such as PBr3 vapor phase reacted at 150°C for 30 minutes, creating reactive sites for mercury oxidation and capture within its tunable pore structure.
```
graph TD
    A[Biochar (Pyrolyzed Agricultural Waste)] --> B{I2 Impregnation in Toluene (80C, 2hr)}
    B --> C[Iodinated Biochar Sorbent]
    D[ZIF-8 MOF Base] --> E{PBr3 Vapor Reaction (150C, 30min)}
    E --> F[Phosphobromide-Functionalized MOF Sorbent]
    C --&gt; G{Mercury Removal from Gas Stream}
    F --&gt; G
```
Material & Component Substitution: Non-Halogen Promoters
- Enabling Description: A promoted carbon sorbent utilizing activated carbon impregnated with sulfur-containing compounds as promoters. Specifically, powdered activated carbon (e.g., Norit Darco FGD) is treated with a 5 wt% solution of dibenzyl disulfide in carbon disulfide (CS2) at 60°C for 4 hours. After solvent evaporation and drying, the disulfide-functionalized carbon exhibits increased elemental mercury adsorption and oxidation due to the formation of sulfur-carbon bonds and accessible sulfhydryl groups on the surface. Alternatively, the activated carbon is promoted with cerium dioxide (CeO2) nanoparticles (average size 5-10 nm) dispersed uniformly on the carbon surface, formed by incipient wetness impregnation of cerium nitrate solution followed by calcination at 400°C. The CeO2 acts as a redox promoter, facilitating the oxidation of elemental mercury.
```
graph TD
    A[Activated Carbon] --> B{Dibenzyl Disulfide Treatment in CS2 (60C, 4hr)}
    B --> C[Disulfide-Functionalized Carbon Sorbent]
    D[Activated Carbon] --> E{Ce(NO3)3 Impregnation & Calcination (400C)}
    E --> F[CeO2 Nanoparticle Promoted Carbon Sorbent]
    C --&gt; G{Mercury Removal}
    F --&gt; G
```
Operational Parameter Expansion: Nanoscale Sorbent Particles
- Enabling Description: A promoted carbon sorbent composed of nanoscale activated carbon particles (mass mean particle diameter < 100 nm) functionalized with bromine. Carbon black with an average primary particle size of 30 nm is dispersed in dichloromethane, and then reacted with molecular bromine (Br2) vapor introduced continuously into the suspension at room temperature. The reaction proceeds until a bromine loading of 10-15 g per 100 g of carbon is achieved. The resulting brominated carbon nanoparticles offer significantly increased specific surface area and reduced diffusional limitations, leading to ultra-fast mercury capture kinetics, particularly beneficial in very short contact time applications such as high-velocity gas streams.
```
graph TD
    A[Carbon Black Nanoparticles (<100nm)] --> B{Dispersion in Dichloromethane}
    B --> C{Br2 Vapor Reaction (Room Temp, Continuous)}
    C --> D[Brominated Carbon Nanoparticle Sorbent]
    D --&gt; E{Ultra-Fast Mercury Capture}
```
Operational Parameter Expansion: High-Temperature Regenerable Sorbent
- Enabling Description: A promoted carbon sorbent designed for sustained operation and regeneration at temperatures exceeding 500°C, specifically for hot gas clean-up in advanced gasification systems. The base material is a highly graphitized carbon material (e.g., carbon felt or silicon carbide-templated carbon) chosen for its thermal stability. This base is promoted with a mixed halide compound, such as antimony tribromide (SbBr3), by vapor deposition at 450°C, which forms stable carbon-halogen bonds resistant to thermal degradation. The sorbent maintains its activity up to 700°C and is regenerated by thermal desorption of mercury under a reductive atmosphere at 650°C, allowing for continuous reuse in high-temperature environments.
```
graph TD
    A[Graphitized Carbon Felt/SiC-Templated Carbon] --> B{SbBr3 Vapor Deposition (450C)}
    B --> C[High-Temperature Promoted Carbon Sorbent]
    C --&gt; D{Mercury Capture (>500C)}
    D --&gt; E{Thermal Regeneration (650C, Reductive Atm)}
    E --&gt; C
```
Cross-Domain Application: Semiconductor Fabrication Gas Purification
- Enabling Description: A promoted carbon sorbent specifically engineered for ultra-trace mercury removal from inert gas streams (e.g., N2, Ar) used in semiconductor manufacturing. The base is an ultrapure, high-surface-area activated carbon with extremely low ash content. This carbon is treated with a gaseous mixture of chlorine (Cl2) and hydrogen bromide (HBr) at controlled partial pressures and room temperature, ensuring minimal introduction of additional contaminants. The resulting halogenated sorbent captures mercury vapor to sub-ppt (parts per trillion) levels, critical for preventing device contamination and yield loss in sensitive electronic fabrication processes.
```
graph TD
    A[Ultrapure Activated Carbon (Low Ash)] --> B{Cl2/HBr Gas Treatment (Controlled Partial Pressures, RT)}
    B --> C[Halogenated Sorbent for Semiconductor Gases]
    C --&gt; D{Ultra-Trace Mercury Removal (Sub-ppt)}
```
Cross-Domain Application: Offshore Oil & Gas Produced Water Treatment
- Enabling Description: A promoted granular activated carbon sorbent for removing dissolved mercury species (e.g., HgCl2, organomercurials) from produced water streams on offshore oil and gas platforms. The granular carbon is pre-treated with an aqueous solution of potassium iodide (KI) and then dried. This iodide-promoted carbon, in a fixed-bed reactor configuration, facilitates the complexation and adsorption of mercury ions from the saline produced water, ensuring discharge compliance. The granular form allows for ease of handling and packaging in cartridge filters.
```
graph TD
    A[Granular Activated Carbon] --> B{KI Aqueous Pre-treatment & Drying}
    B --> C[Iodide-Promoted Granular Sorbent]
    C --&gt; D{Produced Water Stream (Hg Removal)}
```
Cross-Domain Application: Food Processing Air Filtration
- Enabling Description: A promoted carbon sorbent for eliminating trace mercury vapor from ambient air used in sensitive food processing and packaging environments. The sorbent consists of activated carbon fibers (ACF) functionalized with a phosphobromide promoter (e.g., PBr3) applied via a mild solvent-free vapor deposition technique at 100°C. The fibrous structure provides low pressure drop and high removal efficiency for volatile mercury species. This prevents contamination of food products and ensures air quality standards are met within the processing facilities.
```
graph TD
    A[Activated Carbon Fibers (ACF)] --> B{PBr3 Vapor Deposition (100C, Solvent-Free)}
    B --> C[Phosphobromide-Functionalized ACF Sorbent]
    C --&gt; D{Mercury Removal from Food Processing Air}
```
Integration with Emerging Tech: AI-Optimized Sorbent Composition
- Enabling Description: A promoted carbon sorbent whose composition is dynamically optimized by an AI-driven system. Real-time data from upstream process parameters (e.g., coal type, combustion temperature, flue gas flow rate, current mercury speciation) and downstream mercury CEMs are fed into a machine learning model. This model predicts the optimal type and concentration of halogen/halide promoter (e.g., Br2 vs. HCl, amount of promoter per 100g AC) and secondary components for the activated carbon. The AI then controls automated mixing and impregnation systems that precisely adjust the sorbent's chemical composition "in-flight" or during batch preparation, ensuring maximum mercury removal efficiency with minimal sorbent consumption.
```
graph TD
    A[Upstream Process Data (Coal Type, Temp, Flow, Hg Spec.)] --> B(ML Model: Optimal Sorbent Recipe Prediction)
    C[Mercury CEM Data] --> B
    B --> D[Automated Sorbent Production System]
    D --> E[Promoted Carbon Sorbent (Dynamically Optimized)]
    E --&gt; F{Flue Gas Mercury Removal}
```
Integration with Emerging Tech: IoT-Monitored Sorbent Beds
- Enabling Description: A promoted carbon sorbent deployed in fixed beds, where each bed segment is equipped with a network of embedded IoT sensors. These sensors continuously monitor temperature, humidity, differential pressure, and specific mercury vapor breakthrough profiles within the sorbent bed. The data is transmitted wirelessly to a central processing unit, which aggregates the information to provide a real-time "health map" of the sorbent bed, indicating areas of saturation, channeling, or degradation. This allows for predictive maintenance, targeted sorbent replacement, and optimization of bed utilization.
```
graph TD
    A[Sorbent Bed Segment 1] -- IoT Sensors --> B{Wireless Data Tx}
    C[Sorbent Bed Segment N] -- IoT Sensors --> B
    B --> D[Central Processing Unit]
    D --&gt; E(Real-time Sorbent Bed Health Map)
    E --&gt; F[Predictive Maintenance/Replacement]
```
The "Inverse" or Failure Mode: Controlled Mercury Release Sorbent
- Enabling Description: A promoted carbon sorbent explicitly designed for a two-stage mercury management system: initial high-efficiency capture followed by a controlled, safe release of concentrated mercury. The base activated carbon is functionalized with a thermally labile brominated organic moiety. After capturing mercury from the flue gas, the loaded sorbent is transferred to a regeneration unit where a mild thermal treatment (e.g., 200-250°C) selectively breaks the labile carbon-bromine bonds, prompting the release of elemental mercury in a concentrated stream, while the carbon structure remains largely intact for re-promotion. This allows for easier downstream recovery of mercury in a pure form (e.g., by condensation) and potential recycling of the base carbon, reducing disposal volumes of mercury-laden waste.
```
graph TD
    A[Activated Carbon] --> B{Thermally Labile Brominated Moiety Attachment}
    B --> C[Controlled Release Sorbent]
    C --&gt; D{High-Efficiency Mercury Capture}
    D --&gt; E[Regeneration Unit (Mild Thermal Treatment)]
    E --&gt; F(Concentrated Hg Release)
    F --&gt; G[Hg Recovery/Disposal]
    E --&gt; B
```

Independent Claim 10: Method of Producing Promoted Carbon Sorbent

"A method comprising providing a granular activated carbon; reacting the activated carbon with a promoter selected from the group consisting of halogens, halides, and combinations thereof, such that the reaction product comprises a promoted carbon sorbent effective for removal of mercury from a gas stream."

Derivative Variations for Claim 10

Material & Component Substitution: Alternative Carbon Forms as Base
- Enabling Description: A method for producing promoted carbon sorbents where the base material is extruded carbon pellets rather than granular activated carbon. Extruded carbon pellets, typically cylindrical with uniform pores, are fed into a fluidized bed reactor. A gaseous mixture of methyl bromide (CH3Br) and hydrogen iodide (HI) is then introduced into the fluidized bed at 120°C. The promoters react with the carbon surface, forming a promoted extruded carbon sorbent suitable for fixed-bed applications. The uniform shape and size of the pellets ensure consistent gas flow and reduced pressure drop in the bed.
```
graph TD
    A[Extruded Carbon Pellets] --> B{Fluidized Bed Reactor}
    B --> C{CH3Br/HI Gas Mixture (120C)}
    C --> D[Promoted Extruded Carbon Sorbent]
    D --&gt; E{Mercury Removal Application}
```
Material & Component Substitution: Supercritical Fluid Promotion
- Enabling Description: A method for producing promoted carbon sorbents using supercritical carbon dioxide (sc-CO2) as the solvent for the promoter. Granular activated carbon is loaded into a high-pressure reactor. Liquid bromine (Br2) is dissolved in sc-CO2, and this mixture is then introduced into the reactor at 100 bar and 40°C. The sc-CO2's high diffusivity and solvating power allow for deep penetration of bromine into the carbon's micropores. After a reaction period of 1 hour, the sc-CO2 is depressurized and recovered, leaving behind a highly uniformly brominated granular activated carbon with enhanced reactivity and minimal solvent residues.
```
graph TD
    A[Granular Activated Carbon] --> B{High-Pressure Reactor}
    C[Liquid Br2] --> D{sc-CO2 Dispenser}
    D --> B
    B --> E{Reaction (100 bar, 40C, 1hr)}
    E --> F[Depressurization & CO2 Recovery]
    F --> G[Supercritical Fluid Promoted Sorbent]
```
Operational Parameter Expansion: Microwave-Assisted Synthesis
- Enabling Description: A method for rapidly synthesizing promoted carbon sorbents using microwave irradiation. Powdered activated carbon is combined with a small, precise amount of liquid N-bromosuccinimide (NBS) in a microwave-transparent vessel. The mixture is then subjected to controlled microwave irradiation (e.g., 2.45 GHz, 500 W for 5 minutes). The microwave energy directly heats the carbon and initiates the bromination reaction efficiently and quickly, reducing reaction times significantly compared to conventional heating methods. This allows for on-demand, rapid production of fresh sorbent batches at the point of use.
```
graph TD
    A[Powdered Activated Carbon] --> B{Mix with N-Bromosuccinimide (NBS)}
    B --> C{Microwave Irradiation (2.45 GHz, 500W, 5min)}
    C --> D[Microwave-Synthesized Promoted Sorbent]
    D --&gt; E{Rapid Sorbent Deployment}
```
Operational Parameter Expansion: Continuous Flow Reactor Production
- Enabling Description: A continuous method for producing promoted carbon sorbents utilizing a screw-type reactor. Granular activated carbon is continuously fed into one end of a heated (e.g., 180°C) rotating screw reactor. Simultaneously, a gaseous mixture of phosphorus trichloride (PCl3) vapor is injected into the reactor. The screw mechanism ensures intimate mixing and controlled residence time for the carbon and promoter. As the carbon moves through the reactor, it reacts with PCl3, forming a phosphochlorinated sorbent. The promoted sorbent is continuously discharged from the other end of the reactor, enabling large-scale, automated production for industrial applications.
```
graph TD
    A[Granular Activated Carbon Feed] --> B(Screw Reactor)
    C[PCl3 Vapor Feed] --> B
    B --&gt; D{Heated Mixing & Reaction (180C)}
    D --> E[Continuous Promoted Sorbent Output]
```
Cross-Domain Application: Catalyst Support Functionalization
- Enabling Description: A method for functionalizing carbon supports for heterogeneous catalysis. Mesoporous carbon spheres are provided and subjected to a vapor-phase reaction with hydrogen fluoride (HF) at 250°C in a specialized Hastelloy reactor. The HF promotes the formation of stable C-F bonds on the carbon surface, which can then act as a robust and electron-withdrawing support for metal nanoparticles (e.g., Pt, Pd) in various chemical reactions, such as selective hydrogenation or oxidation. This method allows for tailored surface properties of catalytic supports.
```
graph TD
    A[Mesoporous Carbon Spheres] --> B{HF Vapor Reaction (250C, Hastelloy Reactor)}
    B --> C[Fluorinated Carbon Catalyst Support]
    C --&gt; D{Metal Nanoparticle Deposition}
    D --> E[Heterogeneous Catalyst Production]
```
Cross-Domain Application: Water Purification Adsorbent Synthesis
- Enabling Description: A method for synthesizing adsorbents for the removal of arsenic from drinking water. Granular lignite char is first acid-washed to remove impurities and increase surface area. It is then immersed in an aqueous solution containing ferric chloride (FeCl3) and allowed to react for 12 hours. The chloride from FeCl3 promotes the binding of iron oxyhydroxide species to the carbon surface upon drying and calcination at 300°C, creating a highly effective arsenic adsorbent through ligand exchange mechanisms, with the halide acting as an intermediate binding site facilitator.
```
graph TD
    A[Granular Lignite Char] --> B{Acid Wash}
    B --> C{FeCl3 Aqueous Reaction (12hr)}
    C --> D{Drying & Calcination (300C)}
    D --> E[Chloride-Promoted Fe-Lignite Adsorbent]
    E --&gt; F{Arsenic Removal from Water}
```
Cross-Domain Application: Biological Agent Decontamination Material
- Enabling Description: A method for producing a carbon-based material for the rapid adsorption and degradation of biological warfare agents. Activated carbon fabric is treated with a mixture of elemental chlorine (Cl2) gas and ozone (O3) in a flow-through chamber at ambient temperature. This process creates highly reactive chlorinated and oxidized surface sites on the carbon, which can rapidly adsorb and chemically decontaminate various biological toxins and spores through a combination of physical adsorption and reactive degradation.
```
graph TD
    A[Activated Carbon Fabric] --> B{Cl2/O3 Gas Treatment (Ambient Temp, Flow-Through)}
    B --> C[Reactive Halogenated-Oxidized Carbon Fabric]
    C --&gt; D{Biological Agent Decontamination}
```
Integration with Emerging Tech: Robotic Automated Production Line
- Enabling Description: A fully automated, robotic production line for manufacturing promoted granular activated carbon. Robotic arms handle raw granular activated carbon, transfer it to an enclosed reaction chamber, precisely dispense vaporized bromine (Br2) from a controlled reservoir, and then move the reacted sorbent to a drying and packaging station. Machine vision systems inspect particle integrity and uniformity throughout the process. This system minimizes human exposure to hazardous chemicals, ensures batch-to-batch consistency, and operates continuously with minimal oversight.
```
graph TD
    A[Raw Granular AC Hopper] --> B{Robotic Arm 1: Transfer}
    B --> C[Enclosed Reaction Chamber]
    D[Br2 Vapor Dispenser] --> C
    C --> E{Robotic Arm 2: Transfer (Post-Reaction)}
    E --> F[Drying & Packaging Station]
    F --> G[Automated Promoted Sorbent Output]
```
Integration with Emerging Tech: Digital Twin for Process Optimization
- Enabling Description: A method for manufacturing promoted carbon sorbents using a digital twin. A virtual model of the sorbent production process (e.g., granular carbon treatment with HBr in a rotary kiln) is created, incorporating real-time sensor data (temperature, pressure, gas flow, reactant concentrations) and material properties. This digital twin simulates various reaction parameters (e.g., HBr injection rate, kiln rotation speed, temperature profile) to predict sorbent porosity, promoter loading, and mercury capture performance. AI algorithms then optimize these parameters within the digital twin before applying them to the physical production line, leading to predictive quality control and efficiency gains.
```
graph TD
    A[Physical Sorbent Production Line] --> B{Sensors: Real-time Data}
    B --> C[Digital Twin Model]
    D[AI Algorithm] --> C
    C --> E(Simulated Performance Prediction & Optimization)
    E --> F[Control System: Adjust Physical Line Parameters]
    F --&gt; A
```
The "Inverse" or Failure Mode: Promoter Removal/Deactivation Process
- Enabling Description: A method for intentionally deactivating or removing the halogen/halide promoter from a previously promoted carbon sorbent. A brominated activated carbon is subjected to a mild thermal treatment (e.g., 350°C) under a flowing stream of hydrogen (H2) for 30 minutes. The hydrogen acts as a reducing agent, selectively cleaving the carbon-bromine bonds and converting the surface-bound bromide back to elemental hydrogen bromide (HBr), which is then scrubbed. This process effectively regenerates the unpromoted activated carbon, allowing for re-functionalization with a different promoter or reuse in applications where halogenation is undesirable, serving as a controlled "undo" mechanism.
```
graph TD
    A[Brominated Activated Carbon (Spent/Undesired)] --> B{Thermal Treatment (350C) under H2 Flow}
    B --> C[HBr Gas Output (Scrubbed)]
    B --> D[Deactivated/Unpromoted Activated Carbon]
    D --&gt; E{Re-functionalization OR Alternative Use}
```

Independent Claim 18: Method for Reducing Mercury in Flue Gas

"A method for reducing mercury in flue gas comprising providing a sorbent, injecting the sorbent into a mercury-containing flue gas stream, collecting greater than 70 wt-% of the mercury in the flue gas on the sorbent to produce a cleaned flue gas, and substantially recovering the sorbent from the cleaned flue gas."

Derivative Variations for Claim 18

Material & Component Substitution: Sorbent Slurry Atomization
- Enabling Description: A method for reducing mercury in flue gas by injecting a sorbent slurry via acoustic atomization. Instead of dry sorbent powder, a promoted carbon sorbent (e.g., brominated activated carbon) is suspended in a low-viscosity non-aqueous carrier fluid (e.g., recycled light oil or glycerol) to form a slurry. This slurry is then fed to an array of ultrasonic nozzles, which atomize it into a fine mist of droplets (e.g., 10-50 µm diameter) directly into the mercury-containing flue gas stream. The rapid evaporation of the carrier fluid generates highly dispersed, reactive sorbent particles, improving contact efficiency. The loaded sorbent is then collected by a downstream electrostatic precipitator.
```
graph TD
    A[Promoted Carbon Sorbent] --> B{Slurry Preparation (Non-Aqueous Carrier)}
    B --> C[Ultrasonic Atomization Nozzles]
    C --&gt; D[Flue Gas Stream (Hg-Containing)]
    D --> E{Mercury Capture}
    E --> F[Electrostatic Precipitator (Sorbent Collection)]
```
Material & Component Substitution: Advanced Membrane Filtration for Collection
- Enabling Description: A method for reducing mercury in flue gas using an advanced membrane filtration system for sorbent collection. After injection of a promoted carbon sorbent into the flue gas, the gas stream passes through a ceramic membrane filter bank. These ceramic membranes, with sub-micron pore sizes and high-temperature resistance, offer superior particulate collection efficiency compared to traditional fabric filters or ESPs. The collected sorbent, rich in captured mercury, is periodically back-pulsed from the membrane surface for recovery, ensuring high capture rates and efficient sorbent separation from the gas phase.
```
graph TD
    A[Sorbent Injection] --> B[Flue Gas Stream (Hg-Containing)]
    B --> C[Ceramic Membrane Filter Bank]
    C --> D[Cleaned Flue Gas]
    C --> E{Back-Pulsed Sorbent Recovery}
    E --&gt; F[Sorbent Regeneration/Disposal]
```
Operational Parameter Expansion: Distributed, Temperature-Zoned Injection
- Enabling Description: A method for mercury reduction in flue gas involving multiple, strategically placed sorbent injection points along the flue gas duct, each corresponding to a specific temperature zone. For example, a first injection point in a higher temperature zone (e.g., 300°C) uses a sorbent optimized for elemental mercury oxidation (e.g., a brominated carbon). A second injection point in a cooler zone (e.g., 150°C) uses a different sorbent optimized for capturing oxidized mercury (e.g., a sulfur-impregnated carbon or an alkali co-injected sorbent). This multi-stage, temperature-specific injection strategy maximizes overall mercury capture efficiency by adapting to the dynamic speciation of mercury along the flue gas path.
```
graph TD
    A[Flue Gas Inlet (High Temp)] --> B{Injection Point 1 (Hg0 Sorbent, 300C)}
    B --> C[Flue Gas Mid-Duct (Cooler)]
    C --> D{Injection Point 2 (HgOx Sorbent, 150C)}
    D --> E[Cleaned Flue Gas]
    E --> F[Particulate Collection]
```
Operational Parameter Expansion: Pulsed Sorbent Injection for Load Peaks
- Enabling Description: A method for reducing mercury in flue gas by implementing a pulsed sorbent injection strategy. Instead of a continuous, steady injection, the promoted carbon sorbent is injected in short, high-concentration pulses (e.g., 1-second bursts every 30 seconds) in response to real-time spikes in inlet mercury concentration (detected by a fast-response CEM). This allows for rapid response to fluctuating mercury loads, optimizes sorbent utilization by avoiding over-injection during low-load periods, and provides burst capacity for capturing sudden releases, while still maintaining greater than 70 wt% overall removal.
```
sequenceDiagram
    participant CEM as Mercury CEM (Fast-Response)
    participant Controller as Control System
    participant Injector as Sorbent Injector
    participant FG as Flue Gas Stream
    participant Collector as Particulate Collector

    CEM->>Controller: Hg Concentration Data (Continuous)
    alt Hg Concentration > Threshold
        Controller->>Injector: Pulsed Injection Command
        Injector->>FG: High-Concentration Sorbent Pulse
        FG->>Collector: Hg-Laden Sorbent + Cleaned FG
    else Hg Concentration <= Threshold
        Controller->>Injector: Maintain Baseline/Idle
        FG->>Collector: Trace Sorbent + Cleaned FG
    end
    Collector->>FG: Cleaned Flue Gas Outlet
```
Cross-Domain Application: Waste-to-Energy Plant Emissions Control
- Enabling Description: A method for mercury reduction in the variable flue gas streams characteristic of waste-to-energy (WtE) plants. A robust brominated activated carbon sorbent (optimized for high chlorine and moisture content) is injected into the WtE flue gas stream after the boiler. Given the fluctuating waste composition, the system utilizes a predictive model based on incoming waste streams to anticipate mercury levels and adjust sorbent injection rates and potentially co-inject alkali materials. The mercury-laden sorbent is subsequently collected by a fabric filter, ensuring compliance with strict WtE emission regulations.
```
graph TD
    A[Waste-to-Energy Plant Inlet Waste] --> B(Predictive Model: Anticipate Hg Loads)
    B --> C[Flue Gas Stream (Variable Hg, Cl, Moisture)]
    C --> D{Brominated AC Sorbent Injection (Adjusted Rate)}
    D --> E{Mercury Capture}
    E --> F[Fabric Filter (Sorbent Collection)]
    F --> G[Cleaned Flue Gas]
```
Cross-Domain Application: Industrial Incinerator Off-Gas Treatment
- Enabling Description: A method for mercury abatement in the off-gas from industrial incinerators (e.g., hazardous waste, chemical sludge). A promoted carbon sorbent containing both bromine and sulfur functionalities (e.g., brominated carbon further impregnated with elemental sulfur) is injected into the incinerator's cooled off-gas. This bifunctional sorbent is effective against both elemental and oxidized mercury, as well as other heavy metals present in incinerator emissions. The sorbent particles are then recovered using a high-efficiency wet electrostatic precipitator (WESP), which also provides additional particulate and acid gas removal.
```
graph TD
    A[Industrial Incinerator Off-Gas (Hg, Heavy Metals)] --> B{Bifunctional Sorbent Injection (Br/S-Carbon)}
    B --> C{Mercury & Heavy Metal Capture}
    C --> D[Wet Electrostatic Precipitator (WESP)]
    D --> E[Cleaned Off-Gas]
    D --> F[Sorbent Slurry/Recovery]
```
Cross-Domain Application: Geothermal Non-Condensable Gas (NCG) Decontamination
- Enabling Description: A method for removing mercury from non-condensable gas (NCG) streams in geothermal power plants. The NCG stream, typically rich in H2S and CO2, is passed through a fixed bed of a promoted carbon sorbent. The sorbent is a granular activated carbon promoted with an interhalogen compound, such as iodine monochloride (ICl), which is stable in the presence of H2S. This sorbent effectively oxidizes and captures elemental mercury, preventing its release during NCG venting or processing. The fixed bed configuration ensures long contact times suitable for lower flow rate NCG streams.
```
graph TD
    A[Geothermal NCG Stream (Hg, H2S, CO2)] --> B[Fixed Bed Reactor]
    B --> C{Granular AC + ICl Sorbent}
    C --> D{Mercury Oxidation & Capture}
    D --> E[Cleaned NCG]
```
Integration with Emerging Tech: ML-Predicted Sorbent Dosing and Placement
- Enabling Description: A method for mercury reduction in flue gas where a machine learning algorithm predicts optimal sorbent dosing rates and injection locations. The ML model utilizes continuous sensor data, including boiler load, coal feed characteristics, online mercury speciation analyzers, and historical environmental conditions. It predicts the most effective sorbent type (e.g., Br-AC, I-AC, S-AC) and its precise injection rate (grams/ACM) and position (e.g., duct entry, pre-ESP, post-FGD) to achieve >70% mercury removal with minimal sorbent consumption, adapting to dynamic plant operations and fuel changes.
```
graph TD
    A[Boiler Load Data] --> B(ML Prediction Model)
    C[Coal Feed Analysis] --> B
    D[Hg Speciation Analyzer] --> B
    E[Historical Environmental Data] --> B
    B --> F{Optimal Sorbent Type}
    B --> G{Injection Rate}
    B --> H{Injection Location}
    F,G,H --> I[Automated Sorbent Injection System]
    I --> J[Flue Gas Stream]
    J --> K[Hg Capture & Collection]
```
Integration with Emerging Tech: Automated Fault Detection for Sorbent System
- Enabling Description: A method for mercury reduction incorporating an AI-powered automated fault detection system for the sorbent injection and collection infrastructure. IoT sensors deployed on pneumatic transport lines (pressure, flow, vibration), injection nozzles (clogging, wear), and particulate collection devices (differential pressure, fan current) continuously stream data. An AI anomaly detection algorithm analyzes this data in real-time, identifying deviations from normal operating parameters indicative of impending failures (e.g., nozzle blockage, torn filter bags, sorbent feeder malfunction). This enables proactive maintenance, preventing downtime and ensuring continuous mercury removal efficiency.
```
graph TD
    subgraph IoT Sensor Network
        A[Pneumatic Line Sensors]
        B[Injection Nozzle Sensors]
        C[Particulate Collector Sensors]
    end
    A,B,C --> D[Real-time Data Stream]
    D --> E(AI Anomaly Detection Algorithm)
    E --&gt; F{Fault Identification}
    F --&gt; G[Alert System: Maintenance Notification]
    G --&gt; H[Proactive Maintenance Action]
```
The "Inverse" or Failure Mode: Reduced Capture Mode for Emergency Bypass
- Enabling Description: A method for reducing mercury in flue gas that includes a predefined "Reduced Capture Mode" for emergency situations or system bypass events. During such events (e.g., maintenance on the primary particulate collector, sorbent supply disruption), the sorbent injection system automatically switches to a low-power, minimal injection rate (e.g., 10% of normal operation). This mode ensures a baseline mercury reduction (e.g., 20-30% removal) to mitigate environmental impact, even when the primary goal of >70% capture is temporarily suspended. The system provides clear operational alerts indicating the reduced functionality.
```
stateDiagram
    state "Normal Operation (High Capture)" as Normal
    state "Emergency/Bypass Mode (Reduced Capture)" as Emergency

    [*] --> Normal : System Start
    Normal --> Emergency : Fault Detected / Manual Bypass
    Emergency --> Normal : Fault Cleared / Bypass Ended

    Normal : Sorbent Injection: Full Rate
    Normal : Hg Capture: >70 wt%
    Emergency : Sorbent Injection: Minimal Rate
    Emergency : Hg Capture: 20-30 wt%
    Emergency : Alerts: Reduced Functionality
```

Independent Claim 22: Method for Reducing Mercury and Ash in Gas Stream with Size-Based Separation

"A method for reducing the mercury content of a mercury and ash containing gas stream wherein particulate activated carbon sorbent with a mass mean size greater than 40 μm is injected into the gas stream, mercury is removed from the gas by the sorbent particles, the sorbent particles are separated from the ash particles on the basis of size, and the sorbent particles are re-injected to the gas stream."

Derivative Variations for Claim 22

Material & Component Substitution: Magnetic Carbon Sorbents for Separation
- Enabling Description: A method for reducing mercury and ash using magnetic carbon sorbent particles for enhanced separation. Granular activated carbon (mass mean size > 40 µm) is surface-functionalized with superparamagnetic iron oxide nanoparticles (Fe3O4, 5-10 nm) during the bromination process, making the sorbent itself magnetic. After injection and mercury capture, the mixed ash and magnetic sorbent particles are passed through a magnetic separation unit (e.g., a high-gradient magnetic separator). This allows for highly efficient and precise separation of the magnetic sorbent from non-magnetic ash, irrespective of minor size overlap, enabling high-purity sorbent recovery for regeneration and re-injection.
```
graph TD
    A[Granular AC (>40µm)] --> B{Bromination + Fe3O4 Nanoparticle Impregnation}
    B --> C[Magnetic Promoted Carbon Sorbent]
    C --> D[Injection into Hg/Ash Gas Stream]
    D --> E{Hg Capture}
    E --> F[Magnetic Separator]
    F --&gt; G[Separated Ash]
    F --&gt; H[Recovered Magnetic Sorbent]
    H --&gt; I{Regeneration}
    I --&gt; C
```
Material & Component Substitution: Advanced Elutriation Column for Size Separation
- Enabling Description: A method for separating sorbent from ash using an advanced multi-stage counter-current elutriation column. The collected mixture of large sorbent particles (>40 µm) and fine ash particles is introduced into the top of the elutriation column. A precisely controlled upward flow of gas (e.g., clean flue gas or nitrogen) is introduced from the bottom. Lighter, finer ash particles are carried upwards and collected, while the heavier, larger sorbent particles fall against the gas flow and are collected at the bottom. This multi-stage design, with varying gas velocities in different sections, allows for highly selective and efficient separation of particles with subtle density and size differences, achieving superior sorbent purity for recycling.
```
graph TD
    A[Collected Sorbent/Ash Mixture] --> B[Elutriation Column Inlet (Top)]
    C[Gas Inlet (Bottom)] --> B
    B --> D{Upward Gas Flow}
    D --> E[Ash Outlet (Top)]
    D --> F[Sorbent Outlet (Bottom)]
    E --&gt; G[Ash Collection]
    F --&gt; H[Sorbent Recovery for Re-injection]
```
Operational Parameter Expansion: Multi-Stage Cascade Air Classification
- Enabling Description: A method employing a series of cascaded air classifiers for ultra-fine size-based separation of sorbent from ash. Instead of a single separator, the collected sorbent/ash mixture passes through 3-5 sequential air classifiers, each tuned to a progressively narrower size cut-point slightly above 40 µm. The first classifier removes the bulk of the finest ash, and subsequent classifiers further refine the sorbent stream by removing progressively larger, but still undersized, ash particles. This multi-stage approach ensures extremely high purity of the recycled sorbent, minimizing ash carryover and maintaining sorbent performance.
```
graph TD
    A[Collected Sorbent/Ash] --> B[Air Classifier 1 (Coarse Cut)]
    B --&gt; C[Fine Ash 1]
    B --&gt; D[Product 1]
    D --> E[Air Classifier 2 (Medium Cut)]
    E --&gt; F[Fine Ash 2]
    E --&gt; G[Product 2]
    G --> H[Air Classifier N (Fine Cut)]
    H --&gt; I[Ultra-Fine Ash N]
    H --&gt; J[High-Purity Sorbent for Re-injection]
```
Operational Parameter Expansion: Gradient Sorbent Particle Size Injection
- Enabling Description: A method involving the injection of a gradient of promoted carbon sorbent particle sizes. Instead of a single size fraction, sorbent particles are prepared and injected in a continuous or discrete distribution of sizes (e.g., 40-60 µm, 60-80 µm, 80-100 µm). The larger particles are injected upstream where gas velocities are higher and contact times are shorter, providing sufficient momentum for collection, while slightly smaller, but still separable, particles are injected downstream for finer capture. The overall system is designed to handle this distribution, with the separation unit optimized to recover all injected sorbent sizes from the ash.
```
graph TD
    A[Sorbent Prep: Size Fraction 1 (e.g., 40-60µm)] --> B{Upstream Injection}
    C[Sorbent Prep: Size Fraction 2 (e.g., 60-80µm)] --> D{Mid-Stream Injection}
    E[Sorbent Prep: Size Fraction N (e.g., 80-100µm)] --> F{Downstream Injection}
    B,D,F --> G[Flue Gas Stream]
    G --> H[Hg Capture]
    H --> I[Size Separation Unit (Optimized for Gradient)]
    I --&gt; J[Ash]
    I --&gt; K[Mixed Sorbent for Re-injection]
```
Cross-Domain Application: Foundry Sand Reclamation
- Enabling Description: A method adapting the size-based separation principle for the reclamation of spent foundry sand. Spent sand from a casting process, containing larger silica sand particles (analogous to sorbent) and fine clay binders or carbon dust (analogous to ash), is fed into an vibratory fluid bed separator. A precisely controlled airflow fluidizes the mixture. The heavier, larger sand particles settle and are collected for reuse in molding, while the lighter, finer contaminants are elutriated and removed. This mirrors the sorbent-ash separation by size for recycling a valuable particulate material.
```
graph TD
    A[Spent Foundry Sand (Sand + Fines)] --> B[Vibratory Fluid Bed Separator Inlet]
    C[Air Inlet] --> B
    B --> D{Fluidization & Separation}
    D --> E[Fine Contaminants Outlet]
    D --> F[Reclaimed Sand Outlet]
    E --&gt; G[Disposal]
    F --&gt; H[Reuse in Foundry]
```
Cross-Domain Application: Pharmaceutical Granule/Dust Separation
- Enabling Description: A method for separating pharmaceutical granules from fine dust or broken fragments during tablet manufacturing. A mixture of desired pharmaceutical granules (e.g., >100 µm) and undersized powder/dust (e.g., <40 µm) is fed into a vibratory sieve or an air classification system. The system precisely separates the uniform, larger granules for tablet compression, while the fine dust is recovered for re-processing or disposal. This ensures product quality and minimizes waste, leveraging size-based separation akin to sorbent-ash separation.
```
graph TD
    A[Pharma Granule/Dust Mixture] --> B[Vibratory Sieve/Air Classifier]
    B --> C[Fine Dust/Fragments]
    B --> D[Uniform Granules]
    C --&gt; E[Reprocessing/Disposal]
    D --&gt; F[Tablet Compression]
```
Cross-Domain Application: Precious Metal Catalyst Recovery
- Enabling Description: A method for recovering larger precious metal catalyst particles from finer carbon support fragments or reaction byproducts in chemical processes. A spent catalyst stream, containing larger catalyst beads (e.g., Pt/Al2O3, >100 µm) and finer carbonaceous or inorganic debris, is fed into a hydrocyclone separator. The dense, larger catalyst particles are separated from the lighter, finer debris based on density and size, enabling their recovery for regeneration or refining. This principle of size-based separation for high-value particulate recovery is directly analogous to the sorbent recycling.
```
graph TD
    A[Spent Catalyst Stream (Catalyst Beads + Debris)] --> B[Hydrocyclone Separator]
    B --> C[Fine Debris Outlet]
    B --> D[Concentrated Catalyst Beads Outlet]
    C --&gt; E[Disposal/Further Treatment]
    D --&gt; F[Catalyst Regeneration/Refining]
```
Integration with Emerging Tech: Computer Vision for Real-time Particle Analysis
- Enabling Description: A method for optimizing sorbent-ash separation using real-time computer vision and AI. High-speed cameras are installed in the transport lines leading to and from the size separation unit. An AI algorithm analyzes the images to continuously determine the particle size distribution, shape, and even potential composition (e.g., distinguishing sorbent from ash based on optical properties) of the mixed particulate stream. This data provides immediate feedback to control parameters of the air classifier or elutriator (e.g., airflow rate, plate angles), ensuring optimal separation efficiency and maximizing sorbent recovery, even with varying inlet conditions.
```
graph TD
    A[Mixed Sorbent/Ash Stream] --> B{High-Speed Cameras}
    B --> C(AI Image Analysis: PSD, Shape, Composition)
    C --> D[Real-time Feedback Loop]
    D --> E[Size Separation Unit Controller]
    E --&gt; F[Airflow/Physical Parameter Adjustment]
    F --&gt; G[Size Separation Unit]
    G --&gt; H[Recovered Sorbent]
```
Integration with Emerging Tech: Predictive Maintenance for Separation Equipment
- Enabling Description: A method incorporating IoT sensors and AI for predictive maintenance of the sorbent-ash separation equipment. Accelerometers and acoustic sensors are installed on mechanical components (motors, bearings, screens) of the air classifier or vibratory sieve. Flow meters and pressure sensors monitor air/gas distribution within the unit. Data from these sensors is fed into a machine learning model that predicts potential equipment failures (e.g., motor bearing wear, screen clogging, fan imbalance) before they occur. This allows for scheduled maintenance, preventing unscheduled downtime of the sorbent recycling loop and ensuring continuous operation of the mercury removal system.
```
graph TD
    subgraph IoT Sensor Network
        A[Accelerometer (Motor)]
        B[Acoustic Sensor (Bearings)]
        C[Flow/Pressure Sensors (Air Classifier)]
    end
    A,B,C --> D[Data Aggregation]
    D --> E(ML Model: Failure Prediction)
    E --&gt; F{Predictive Maintenance Alert}
    F --&gt; G[Maintenance Scheduling]
    G --&gt; H[Separation Equipment]
```
The "Inverse" or Failure Mode: Ash Diversion for Contamination Control
- Enabling Description: A method for reducing mercury where, in the event of a critical failure in the size-based sorbent/ash separation system (e.g., a torn screen, severe blockage causing off-spec sorbent purity), a rapid-response diversion mechanism is activated. The mixed particulate stream, which would otherwise be partially recycled as contaminated sorbent, is immediately rerouted to a dedicated hazardous waste stream. This "Ash Diversion Mode" prevents the re-injection of ash-contaminated sorbent into the flue gas or the contamination of the sorbent regeneration unit, thus safeguarding the overall process integrity and preventing uncontrolled mercury release.
```
stateDiagram
    state "Normal Separation" as Normal
    state "Ash Diversion Mode" as Diversion

    [*] --> Normal : System Start
    Normal --> Diversion : Separation Failure Detected
    Diversion --> Normal : Failure Rectified

    Normal : Sorbent/Ash to Separator
    Normal : Sorbent to Re-injection, Ash to Disposal
    Diversion : Sorbent/Ash to Hazardous Waste Stream
    Diversion : Alerts: Separation Failure
```

Combination Prior Art Scenarios

These scenarios combine aspects of US10596517 with existing open-source standards, demonstrating how the patent's teachings can be integrated into broader, publicly available frameworks, thereby contributing to the "obviousness" of further developments.

Combination Prior Art Scenario 1: AI-Driven Sorbent Optimization using OPC UA for Data Exchange
- Enabling Description: An industrial mercury removal system as described in US10596517 (Claim 18, method for reducing mercury in flue gas, or Claim 1, promoted sorbent composition) is integrated with an AI-driven sorbent optimization algorithm. Real-time data from continuous emission monitors (CEMs) for mercury, flue gas analyzers (SOx, NOx, O2, H2O), and boiler operating parameters are collected and exchanged using the OPC Unified Architecture (OPC UA) open-source standard. The OPC UA information model provides a standardized, interoperable framework for the semantic exchange of process data. The AI algorithm, utilizing this OPC UA data, dynamically adjusts the type and injection rate of the promoted carbon sorbent (e.g., halogenated activated carbon prepared in-flight), ensuring optimal mercury capture efficiency while minimizing sorbent consumption, all communicated and controlled via secure OPC UA channels.
```
graph TD
    A[Flue Gas CEM (Hg, SOx, NOx)] -- OPC UA Data --> B(OPC UA Server)
    C[Boiler SCADA (Operating Parameters)] -- OPC UA Data --> B
    B --> D(AI Sorbent Optimization Algorithm)
    D --> E[OPC UA Client (Sorbent Controller)]
    E --&gt; F[Sorbent Injection System (US10596517)]
    F --&gt; G[Flue Gas Stream]
    G --> H[Hg Reduction]
```
Combination Prior Art Scenario 2: Blockchain-Enabled Sorbent Supply Chain Verification with GS1 Standards
- Enabling Description: The production and lifecycle management of the promoted carbon sorbents described in US10596517 (Claim 10, method of producing sorbent) are managed on a blockchain ledger for enhanced transparency and verification. Each batch of raw activated carbon, promoter chemicals, and the final promoted sorbent product is assigned a unique identifier using GS1 standards (e.g., Global Trade Item Numbers - GTINs, or Serial Shipping Container Codes - SSCCs). Critical manufacturing parameters (e.g., promoter concentration, reaction temperature, drying conditions) and quality control data (e.g., mercury capture capacity test results) are recorded as immutable transactions on a permissioned blockchain. This provides a verifiable audit trail for regulatory compliance, ensures product authenticity, and traces the sorbent from production to regeneration and reuse, enhancing trust in the supply chain.
```
sequenceDiagram
    participant RawMat as Raw Material Supplier
    participant SorbentMfg as Sorbent Manufacturer (US10596517 Claim 10)
    participant Logistics as Logistics Provider
    participant EndUser as End User Facility
    participant Regulator as Regulatory Authority
    participant Blockchain as Blockchain Ledger

    RawMat->>SorbentMfg: Supply Activated Carbon (GS1 GTIN)
    SorbentMfg->>Blockchain: Record Raw Material Purchase (Tx1)
    SorbentMfg->>SorbentMfg: Promote Carbon (US10596517 Method)
    SorbentMfg->>Blockchain: Record Mfg Parameters & QC (Tx2)
    SorbentMfg->>Logistics: Ship Promoted Sorbent (GS1 SSCC)
    Logistics->>Blockchain: Record Shipment Details (Tx3)
    EndUser->>EndUser: Receive & Use Sorbent
    EndUser->>Blockchain: Record Sorbent Usage & Performance (Tx4)
    Regulator->>Blockchain: Audit Sorbent Traceability & Compliance
```
Combination Prior Art Scenario 3: IoT-Monitored Regenerable Sorbent Bed with MQTT Communication Protocol
- Enabling Description: A regenerable fixed-bed system utilizing the promoted carbon sorbents of US10596517 (Claim 1) for mercury removal is equipped with an array of IoT sensors for real-time monitoring. These sensors, strategically placed within the sorbent bed, monitor parameters such as mercury breakthrough, temperature profiles, and differential pressure. The sensor data is transmitted wirelessly to a local gateway using the lightweight MQTT (Message Queuing Telemetry Transport) open-source protocol. The MQTT broker aggregates this data and publishes it to subscribed analytics platforms, enabling real-time assessment of sorbent saturation, predictive regeneration scheduling, and automated alerts for operational anomalies, optimizing the regeneration cycles described in the patent.
```
graph TD
    A[Sorbent Bed Segment 1 (US10596517 Sorbent)] -- IoT Sensors --> B{MQTT Publisher}
    C[Sorbent Bed Segment N (US10596517 Sorbent)] -- IoT Sensors --> D{MQTT Publisher}
    B,D --> E[MQTT Broker]
    E --> F(Data Analytics Platform - MQTT Subscriber)
    F --> G{Real-time Sorbent Status & Prediction}
    G --> H[Regeneration Control System (US10596517 Regeneration)]
```