Pressure-Swing Absorption for CO2 Capture Energy Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional systems for capturing carbon dioxide from atmospheric air are energy-intensive, not scalable, and not cost-effective, leading to substantial energy losses.
Innovation Solution
A pressure-swing absorption system that uses a working fluid to absorb and desorb carbon dioxide by oscillating between high and low-pressure vessels, leveraging energy recovery through a driveshaft coupled compressor and turbine to reduce energy consumption and increase efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional carbon dioxide capture systems are used, then carbon dioxide can be captured from atmospheric air, but energy consumption is excessive and the system is not scalable
Solution Approach 1:
The system employs periodic pressure cycling between high-pressure and low-pressure vessels to alternately absorb and desorb carbon dioxide. The working fluid is repeatedly pressurized to absorb CO2 in high-pressure vessels, then depressurized to release concentrated CO2 in low-pressure vessels, creating a continuous periodic capture cycle that reduces overall energy consumption compared to continuous high-energy capture methods
Solution Approach 2:
The system changes the pressure parameter of the working fluid between two distinct states (high-pressure absorption mode and low-pressure desorption mode). By cycling the pressure parameter, the system achieves both capture and release functions using the same working fluid, significantly reducing the energy required compared to traditional methods that maintain constant high-pressure conditions
2Adaptability or versatility
If traditional carbon dioxide capture systems are used, then carbon dioxide capture is achieved, but the system lacks scalability and cost-effectiveness
Solution Approach 1:
The system divides the carbon dioxide capture process into multiple independent pressure vessels operating in parallel. Each vessel can be independently filled, processed, and emptied, allowing the system to scale by simply adding or removing vessels. This modular segmented architecture enables flexible adaptation to different capture scales while maintaining energy efficiency through standardized operational cycles
Solution Approach 2:
The system recovers the working fluid after each desorption cycle and reuses it in the next absorption cycle. By continuously recovering and recycling the working fluid rather than discarding it, the system eliminates the energy cost of continuously producing fresh absorbent material, significantly reducing overall energy consumption and enabling scalable deployment
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 system achieves 40% less energy consumption than traditional carbon capture systems, is scalable, and cost-effective, enabling efficient and widespread capture of carbon dioxide from atmospheric air.
Implementation Method 1
pressure-swing absorption of carbon dioxide
Implementation Method 2
pressure-swing absorption of carbon dioxide
Implementation Method 3
conveying the first mixture through a compressor configured to pressurize the first mixture
Implementation Method 4
conveying the second mixture from the high-pressure vessel through a turbine configured to extract energy from the second mixture and reduce the pressure
Data Source
AI summary
One variation of a method for carbon sequestration includes: mixing ambient air including carbon dioxide and secondary gases with a working fluid to generate a first mixture; conveying the first mixture through a compressor to pressurize the first mixture from a first pressure to a second pressure greater than the first pressure to promote absorption of carbon dioxide into the working fluid; depositing the first mixture in a high-pressure vessel to generate an exhaust stream of secondary gases and a second mixture including carbon dioxide dissolved in the working fluid; conveying the second mixture through a turbine configured to extract energy and reduce pressure of the second mixture, from the second pressure to the first pressure, to promote desorption of carbon dioxide from the working fluid; transferring the second mixture into the low-pressure vessel; and releasing carbon dioxide, desorbed from the working fluid, from the low-pressure vessel for collection.