Illite Absorbent Composition for CO2 and SOx Removal
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Solution Overview
Problem
Existing methods struggle to efficiently remove large amounts of carbon dioxide and sulfur oxides from power plant exhaust gases, and the construction and operation of large-scale facilities for CO2 removal are economically infeasible, leading to significant CO2 emissions and wastewater generation.
Innovation Solution
A method involving the production of a carbon dioxide absorbent using illite powder, sodium hydroxide, and additives like sodium tetraborate and water glass, followed by separation and mixing with surfactants and oxyacids to create a desulfurization catalyst, enhancing absorption and removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If large-scale facilities using limestone absorbent are constructed to remove CO2, then CO2 removal capacity is improved, but construction cost and operational complexity increase significantly
Solution Approach 1:
The invention changes the chemical composition parameters of the absorbent by using illite-based materials with specific cation exchange capacities and surface properties, rather than conventional limestone. This allows for enhanced CO2 absorption performance at smaller facility scales
Solution Approach 2:
The patent employs composite absorbent materials combining illite minerals with selected additives to create a multi-functional substance that simultaneously removes CO2 and SOx, improving removal capacity without proportionally increasing facility complexity
2Quantity of substance
If conventional limestone absorbent is used for CO2 removal, then CO2 absorption is achieved, but enormous wastewater generation occurs
Solution Approach 1:
The illite-based absorbent exhibits self-regeneration capabilities through its mineral structure, allowing it to be regenerated and reused multiple times without significant performance degradation, thereby minimizing wastewater generation from spent absorbent disposal
Solution Approach 2:
The patent implements a recovery system where the illite absorbent is regenerated after use, and valuable components are recovered and reused, significantly reducing wastewater discharge compared to conventional limestone-based systems
3Quantity of substance
If CO2 is captured for resource conversion, then CO2 utilization is improved, but impurities from dust and sulfur oxides reduce the purity of captured CO2
Solution Approach 1:
The patent employs a multi-stage gas cleaning process that segments the removal of different impurities: first removing SOx and heavy metals, then filtering dust particles, and finally purifying CO2 to achieve the required purity for resource conversion applications
Solution Approach 2:
The illite-based absorbent acts as an intermediary substance that selectively captures CO2 while allowing other gases to pass through, and subsequently releases pure CO2 after regeneration, effectively separating CO2 from impurities in the exhaust gas stream
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
The method effectively absorbs and removes carbon dioxide and sulfur oxides from exhaust gases, producing a desulfurization catalyst that reduces CO2 emissions and minimizes wastewater generation, with improved absorption rates and catalyst activity.
Implementation Method 1
a carbon dioxide absorbent capable of absorbing and removing large amounts of carbon dioxide as well as sulfur oxides from exhaust gases
Implementation Method 2
introducing sodium hydroxide into the reaction bath, followed by stirring
Implementation Method 3
separating and filtering a supernatant from the reaction bath
Implementation Method 4
separating and filtering a supernatant from the reaction bath
Data Source
AI summary
The present invention relates to a method for producing a carbon dioxide absorbent and a desulfurization catalyst, the method comprising the steps of: (S10) introducing an illite powder into a reaction bath storing water heated to 40 to 100° C., followed by stirring; (S20) introducing sodium hydroxide into the reaction bath, followed by stirring; (S30) separating and filtering a supernatant from the reaction bath; and (S40) separating a precipitate from the reaction bath.