Rating and performance of plate fin heat exchanger used for cryogenic separation of CO ₂

Abstract

Carbon capture by cryogenic treatment is one of the emerging methods in curbing carbon dioxide (CO 2 ) emissions, because it not only offers energy-saving, but also environmental benefits due to the absence of chemicals as used by other methods. However, the cryogenic system used for CO 2 capture demands a high-effectiveness heat exchanger. In this case, a plate-fin heat exchanger (PFHE) is used. In this study, PFHE is analyzed for decreasing the temperature of CO 2 and N 2 mixture with cold N 2 gas. The study consists of three parts that are (i) a comparative study of Aspen EDR with heat exchanger parameter evaluation correlations such as Joshi & Webb, Manglik & Bergles, and Maiti & Sarangi, and (ii) validation of Aspen EDR software with experimental results which is available from open literature. Hence, validation of heat exchanger design is indirectly done with experimental results. (iii) Besides this, the research is aimed at studying the influence of the gas mixture inlet temperature, the concentration of CO 2 , pressure drop, and the mass flow rate on PFHE's effectiveness. The study results are analyzed and presented in this research article.

Environmental Impact Evaluation of CO₂ Absorption and Desorption Enhancement by Membrane Gas Absorption: A life Cycle Assessment Study

“…CCS can be further classified into three categories: pre-combustion capture, oxygen combustion capture and post-combustion capture. For CO2 post-combustion capture from coal-fired power plants, the chemical and physical absorption [6], solid adsorption [7], cryogenic distillation [8] and membrane separation [9] technologies have been currently proposed without significant retrofitting of existing infrastructures. Chemical absorption has been extensively used as the most well established technology at the commercial scale in the gas separation industry for decades attributed to its high removal efficiency.…”

Environmental Impact Evaluation of CO2 Absorption and Desorption Enhancement by Membrane Gas Absorption: A Life Cycle Assessment Study

“…CCS can be further classified into three categories: pre-combustion capture, oxygen combustion capture and post-combustion capture. For CO 2 post-combustion capture from coal-fired power plants, chemical and physical absorption [6], solid adsorption [7], cryogenic distillation [8] and membrane separation [9] technologies have been currently proposed without significant retrofitting of existing infrastructure. Chemical absorption has been extensively used as the most well-established technology on a commercial scale in the gas separation industry for decades, attributed to its high removal efficiency.…”