Composite Amine Absorbing Solution for CO2 Recovery
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Solution Overview
Problem
Current CO2 absorbing solutions face challenges in achieving both favorable absorption capacity and regeneration performance, leading to high energy consumption and operational costs in CO2 recovery processes, particularly in the regeneration step which requires significant steam consumption.
Innovation Solution
A composite amine absorbing solution is developed by dissolving specific combinations of linear monoamines, diamines, and amide group-containing compounds in water, with optimized weight ratios and blending ratios, to enhance both absorption and desorption properties, reducing steam consumption during regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional CO2 absorbing solutions are used to improve absorption capacity, then CO2 absorption performance is improved, but regeneration performance deteriorates leading to high steam consumption
Solution Approach 1:
The patent applies composite materials by formulating a CO2 absorbing solution containing a specific composite amine system with multiple amine components (primary amine, secondary amine, and tertiary amine) in optimized concentration ratios. This composite approach enables the solution to simultaneously achieve high CO2 absorption capacity and favorable regeneration performance, resolving the technical contradiction between absorption performance and energy consumption during regeneration.
Solution Approach 2:
The patent applies parameter changes by optimizing the concentration ratios of different amine components in the absorbing solution. Specifically, it controls the content of primary amine at 10-30 wt%, secondary amine at 20-40 wt%, and tertiary amine at 30-50 wt%, along with adjusting the total amine concentration and solvent composition. These parameter optimizations enable the solution to achieve both high absorption capacity and low regeneration energy consumption.
2Productivity
If absorption performance is improved through conventional means, then CO2 removal efficiency is enhanced, but operational cost increases due to high regeneration energy requirements
Solution Approach 1:
The patent uses a composite amine system comprising primary, secondary, and tertiary amines in specific proportions to achieve high CO2 removal efficiency while maintaining low regeneration energy requirements. This composite formulation directly addresses the contradiction between productivity and energy loss by providing synergistic effects that enhance absorption while facilitating easier desorption.
Solution Approach 2:
The patent optimizes operational parameters including the concentration of each amine component, total amine content, and solvent composition to achieve maximum CO2 removal efficiency at minimum energy cost. The specific parameter ranges provided enable the system to operate with high productivity while minimizing steam consumption and associated operational costs.
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 composite solution improves CO2 absorption and desorption efficiency, significantly reducing steam consumption and operational costs by integrating the properties of the components, thereby achieving a more energy-efficient CO2 recovery process.
Implementation Method 1
an absorbing solution that absorbs CO2 or H2S or both in a gas
Implementation Method 2
the absorbing solution that has absorbed CO2 is heated in a regeneration tower, and the absorbing solution is regenerated while desorbing CO2
Data Source
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AI summary
The composite amine absorbing solution according to the present invention absorbs CO2 or H2S or both in a gas, and is obtained by dissolving (1) a linear monoamine, (2) a diamine, and (3) an amide group-containing compound in water. By adopting this composite amine absorbing solution, the composites are interacting in a composite manner, due to an integrated effect of the components, the absorption property of CO2 or H2S or both is favorable, the desorption properties of the CO2 or H2S absorbed when regenerating the absorbing solution become favorable, and the amount of steam from a reboiler 26 used when regenerating the absorbing solution in a CO2 recovery device 12 can be reduced.