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

Abstract

CO 2 capture and storage (CCS) technology has attracted attention for the mitigation of CO 2 emissions. Among the dominant CO 2 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 CO 2 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.

Reducing energy consumption of advanced PTSA CO2 capture process―Experimental and numerical study

“…Chemical heat transformer (CHT) mainly consists of a compressor and heat exchangers [31,32]. In CHT, the liquid working fluid (with a low boiling point) initially exchanges heat with the column of adsorption, and it is heated into a vapor state.…”

Diseño óptimo de un proceso de captura de CO2 mediante un sistema de reactores rotatorios

“…[26] _____________________________________ Figura 2-3 Captura de CO2 por Combustión Oxyfuel. [26] ___________________________________ Figura 2-4 Diagrama de Flujo de un Proceso Típico PSA [41] _______________________________ Figura 2-5 Principio de Separación de un Gas con Membranas. [26] _________________________ Figura 2-6 Diagrama de Flujo del Proceso de Captura de CO2 por Separación Criogénica.…”

“…Figura 2-4 Diagrama de Flujo de un Proceso Típico PSA [41] Consiste en una membrana sólida microporosa, que es el contacto entre el gas y el líquido. El CO2 es separado del gas por difusión a través de la membrana y luego es recuperado por un líquido absorbente mediante absorción [34].…”