Sulfur-Functionalized Polymers for Mercury Removal
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Solution Overview
Problem
Current methods for removing mercury and other heavy metals from industrial gases and wastewater are inefficient, generate significant solid waste, and are not environmentally friendly, as they rely on halogen-impregnated activated carbon that can release halogens during storage and handling, and require complex pH adjustments.
Innovation Solution
Development of sulfur-functionalized polymers (Poly-SR) derived from halogenated compounds and sulfur-containing materials, which form stable mercury sulfide complexes, allowing for efficient mercury enrichment and elimination, and can be reused after regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If halogen-impregnated activated carbon is used for mercury removal, then mercury removal efficiency is improved, but the sorbent releases halogens during storage and handling, causing environmental harm
Solution Approach 1:
The patent converts the harmful halogen elements into beneficial sulfur functional groups through chemical transformation. Instead of using halogen-impregnated carbon that releases harmful halogens, the invention uses sulfur-functionalized polymers where sulfur atoms form stable complexes with mercury, converting the potential harm of reactive elements into a beneficial mercury-binding capability without releasing harmful substances during storage and handling.
Solution Approach 2:
The patent changes the chemical parameter of the sorbent from halogen-based to sulfur-based functional groups. This parameter change transforms the sorbent's chemical composition and reactivity profile, maintaining high mercury removal efficiency while eliminating the harmful side effect of halogen release during storage and transport.
2Productivity
If halogen-impregnated activated carbon is used, then mercury removal capability is improved, but the method generates significant solid waste requiring landfill disposal
Solution Approach 1:
The patent enables recovery and regeneration of the sorbent material. The sulfur-functionalized polymers can be regenerated after mercury saturation, allowing the sorbent to be reused multiple times. This eliminates the need to discard saturated sorbent as waste and instead enables continuous recovery and reuse of the mercury removal capability.
Solution Approach 2:
The sulfur-functionalized polymer structure provides inherent stability and regenerability without requiring complex external systems. The material's chemical structure enables it to maintain integrity during storage, efficiently capture mercury, and be regenerated for reuse, making the system self-sufficient and waste-minimizing.
3Productivity
If halogen-impregnated activated carbon is used, then mercury adsorption is improved, but the halogens are highly corrosive and volatile, creating safety hazards
Solution Approach 1:
The patent converts the harmful properties of halogen elements into beneficial properties of sulfur elements. Sulfur-functionalized polymers provide strong mercury-binding capability through sulfur-mercury complex formation, while sulfur compounds are generally less corrosive and less volatile than halogen compounds, thereby eliminating safety hazards while maintaining or improving mercury adsorption performance.
4Productivity
If complex pH adjustment methods are used for heavy metal removal, then removal efficiency is improved, but the process complexity increases
Solution Approach 1:
The sulfur-functionalized polymers provide inherent heavy metal binding capability through their chemical structure without requiring external pH adjustment systems or complex process controls. The sulfur groups naturally bind to heavy metals across a range of pH conditions, making the process simpler and more robust while maintaining high removal efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Poly-SR effectively removes mercury and other heavy metals from gases and liquids, maintaining stability at elevated temperatures, reducing waste generation, and enabling efficient recycling, thus meeting environmental regulations.
Implementation Method 1
sulfur-functionalized polymers (Poly-SR) derived from halogenated compounds and sulfur-containing materials, which form stable mercury sulfide complexes
Implementation Method 2
allowing for efficient mercury enrichment and elimination
Data Source
AI summary
Methods of preparation and application of sulfur functionalized polymers. More particularly, triazine, cyclotriphosphazene and/or phenyl derivatives can be polymerized to form sulfur functionalized polymers. The materials can be used for separating heavy metals from gas and liquid. The invention is a solid extractant or sorbent that upon exposure or contact with a gas and/or liquid can remove contaminates or impurities. The material can be employed as a solid agent to remove mercury and other heavy metal from combustion, calcinations and/or industrial gases. Also, the material can be applied as extracting agent for removing mercury and other heavy metal from a liquid phase. Further, the material can be used for removing/recovering hazardous elements from radioactive nuclear waste; or can be used for removing organic compounds from gases and liquids.