Conceptual design of a novel pressure swing CO2 adsorption process based on self-heat recuperation technology

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Abstract

CO2 capture and storage (CCS) technology has attracted attention for the mitigation of CO2 emissions. Among the dominant CO2 capture technologies, pressure swing adsorption (PSA) is a promising alternative to amine-based absorption. However, its capture cost should be further decreased to facilitate its commercial implementation in industry. In this study, a novel low-cost PSA CO2 capture process based on self-heat recuperation technology is discussed. An energy balance of the conventional process and the proposed process is simulated and compared using a commercial process simulator (PRO/II ver. 9.1, Invensys). In the proposed PSA process, the exothermic heat of adsorption is recuperated using a reaction heat transformer (RHT) and is recirculated for adsorbent regeneration. The waste residual gas pressure can also be recovered by an expander at the top of an adsorption tower. The simulation results indicate that the energy consumption of the proposed PSA process is 40% that of the conventional process.

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Song, C., Kansha, Y., Ishizuka, M., Fu, Q., & Tsutsumi, A. (2015). Conceptual design of a novel pressure swing CO2 adsorption process based on self-heat recuperation technology. Chemical Engineering and Processing: Process Intensification, 94, 20–28. https://doi.org/10.1016/j.cep.2015.03.008

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