Volume 57

Energy-Optimized Adsorption-Liquefaction CO2 Capture for Industrial Low Carbon Transition Yong Wang, Qiang Li, Yue Pang, Liyun Zhu, Zhenbo Wang

Abstract

Optimization of integrated carbon capture processes is considered essential for addressing the challenges of low capture efficiency and high costs associated with low-concentration CO2 streams, thereby advancing low-carbon industrial practices. In this context, an adsorption-coupled cryogenic liquefaction process is proposed. Process efficiency and system energy consumption under diverse feed conditions were systematically evaluated via simulation. Techno-economic assessment was performed considering the trade-off between capture performance and energy requirements. Simulation results indicate that at feed CO2 concentrations of 5–15%, capture rates of 80.60–81.50% were achieved with product purity of 98.60–98.94%, while energy consumption ranged from 4.012 to 4.494 GJ/tCO2. When optimizing for a 90% capture rate, product purity increased by 0.1% on average, though a 7.34% average increase in energy consumption was observed. Integration of this process with recoverable cold energy from gas-fired power plants could reduce energy consumption by >2 GJ/tCO2, significantly lowering operational demands. This approach provides a validated pathway toward decarbonizing industrial systems, demonstrating both theoretical and practical significance for achieving carbon neutrality.

Keywords Carbon capture, Process optimization, adsorption, cryogenic liquefaction process