Carbon Capture Solvent System with Piperazine and Sulfolane
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Solution Overview
Problem
Current methods for removing carbon dioxide (CO2) from industrial effluent gases, such as those from power plants, are inefficient and require significant energy for regeneration, limiting their effectiveness and economic viability.
Innovation Solution
A solvent system comprising N-methyldiethanolamine (MDEA) or 2-amino-2-methyl-1-propanol, piperazine amines, a carbonate buffer, water, and glycol or sulfolane, which absorbs CO2 at a specific temperature and can be regenerated efficiently by heating above 80°C, maintaining a single liquid phase and optimizing CO2 capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional CO2 removal methods are used, then CO2 can be removed from industrial effluent gases, but significant energy is required for regeneration and effectiveness is limited
Solution Approach 1:
The patent uses a composite solvent system combining alkanolamine (25-40 wt%), piperazine amine (10-25 wt%), carbonate buffer (0.15-10 wt%), and glycol or sulfolane (10-20 wt%) to create a synergistic absorption medium that enhances CO2 capture efficiency while reducing regeneration energy requirements through the combined chemical properties of multiple components
Solution Approach 2:
The patent optimizes specific parameters including water content (less than 75% by weight), temperature conditions for absorption and regeneration (above 80°C), and precise compositional ratios of solvent components to achieve improved CO2 capture performance with lower energy input for the regeneration process
2Productivity
If conventional solvents are used for CO2 absorption, then CO2 can be captured, but the process requires high energy input and has limited effectiveness
Solution Approach 1:
The carbonate buffer acts as an intermediary component in the solvent system, facilitating CO2 absorption through buffer chemistry that enhances the overall efficiency of the absorption process while reducing the energy penalty associated with solvent regeneration
Solution Approach 2:
The patent employs specific compositional parameters and temperature control (absorption at lower temperatures, regeneration above 80°C) to optimize the balance between CO2 capture efficiency and energy consumption, achieving high productivity with reduced energy input
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 solvent system significantly enhances CO2 capture efficiency and reduces energy requirements for regeneration, making it a more effective and cost-efficient method for CO2 removal from industrial sources.
Implementation Method 1
allowing the solvent to absorb CO2 at a particular temperature to form a CO2-rich solvent
Implementation Method 2
regenerating the solvent by heating the CO2-rich solvent to greater than 80°C
Data Source
Figure 1
Figure 2~3
AI summary
A solvent for recovery of carbon dioxide from gaseous mixture, having alkanolamine, reactive amines acting as promoter or activators, glycol, and a carbonate buffer. A solvent for recovery of carbon dioxide from gaseous mixture, having alkanolamine, reactive amines acting as promoter or activators, sulfolane, and a carbonate buffer. One specific solvent contains less than about 75% by weight of water and has a single liquid phase.