CO2 Recovery with Steam Recirculation and Partial Pressure Control
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Solution Overview
Problem
Existing carbon dioxide recovery systems and devices incur high costs due to the need for high-temperature facilities and increased energy consumption, primarily in chemical absorption and solid adsorbent methods.
Innovation Solution
A gas recovery device and method that includes a carbon dioxide separation unit, steam supply unit, carbon dioxide recovery unit, and circulation path, utilizing steam to reduce carbon dioxide partial pressure and recover carbon dioxide efficiently while reusing steam or condensed water in the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical absorption method using low-temperature amine absorption solution is used to separate carbon dioxide, then carbon dioxide can be effectively adsorbed and desorbed, but high-temperature facilities and increased energy consumption are required
Solution Approach 1:
The invention changes the operating parameters by using a hydrophobic ionic liquid that enables carbon dioxide separation at lower temperatures compared to conventional amine absorption solutions, thereby reducing the energy required for heating and high-temperature facilities while maintaining effective carbon dioxide adsorption and desorption
Solution Approach 2:
The invention employs a composite approach by combining hydrophobic ionic liquid with specific functional groups that enhance carbon dioxide selectivity and adsorption capacity, achieving effective separation without requiring the high-temperature infrastructure needed for conventional chemical absorption methods
2Reliability
If solid adsorbent with proton-type zeolite supporting secondary amine is used for carbon dioxide separation, then carbon dioxide can be adsorbed, but drying facilities are required due to competitive adsorption of moisture and carbon dioxide
Solution Approach 1:
The invention changes the chemical parameters by using hydrophobic ionic liquid that inherently repels moisture through its hydrophobic properties, eliminating the need for competitive adsorption management and associated drying facilities while maintaining high carbon dioxide adsorption performance
Solution Approach 2:
The hydrophobic ionic liquid serves as a replaceable absorption medium that can be regenerated without complex drying mechanisms, simplifying the overall device structure by eliminating the need for integrated drying facilities required in solid adsorbent systems
3Reliability
If high-temperature facilities are added for heating or drying in carbon dioxide recovery systems, then carbon dioxide separation can be achieved, but costs increase
Solution Approach 1:
The invention changes the thermal parameters by utilizing hydrophobic ionic liquid that operates effectively at lower temperatures, eliminating the need for expensive high-temperature heating facilities and drying equipment, thereby reducing both capital expenditure and operational costs while maintaining carbon dioxide recovery effectiveness
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
Reduces costs and improves efficiency in carbon dioxide recovery by minimizing the need for high-temperature facilities and optimizing energy use through steam recycling.
Implementation Method 1
a steam supply unit configured to supply steam to the carbon dioxide separation unit to reduce a partial pressure of the carbon dioxide in the carbon dioxide separation unit
Implementation Method 2
a circulation path configured to deliver the steam removed in the carbon dioxide recovery unit or water condensed from the steam to the steam supply unit
Data Source
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AI summary
There is provided a gas recovery device that can reduce costs while improving the efficiency of gas recovery. The gas recovery device includes a carbon dioxide separation unit including a carbon dioxide separation material configured to separate carbon dioxide from a supply gas; a steam supply unit configured to supply steam to the carbon dioxide separation unit to reduce a partial pressure of the carbon dioxide in the carbon dioxide separation unit; a carbon dioxide recovery unit configured to recover the carbon dioxide separated in the carbon dioxide separation unit while removing the steam; and a circulation path configured to deliver the steam removed in the carbon dioxide recovery unit or water condensed from the steam to the steam supply unit.