(373z) Process Design and Optimization of Membrane-Cryogenic CO2 Capture Process for Industrial CO2 Emissions

In order to achieve carbon neutrality by 2050, countries around the world are preparing various measures to reduce CO₂ emissions. Also, the attention of CO₂ capture technology is increasing even in industrial sites that emit large amounts of CO₂, such as cement, steel, and oil refining. Accordingly, demand for and research on CO₂ capture technology is expected to increase continuously.

Among the CO_­2 capture technologies, the membrane is one of promising and attractive alternatives due to small footprint, no requirement of thermal energy, and environmentally friendly. In addition, it has been reported that a membrane-based hybrid process such as membrane-cryogenic distillation process has the potential to achieve high energy-efficiency and cost-effectiveness for treating high CO₂ contents of flue gas.

In this study, process design of membrane-cryogenic CO₂ capture process was carried out for industrial CO₂ emission sources. The optimization framework with the objective function of CO₂ capture cost can determine optimal configuration and operating conditions for hybrid capture systems, in which design interactions between the membrane and cryogenic CO₂ capture process are systematically evaluated.

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C2002263) and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20214710100060).