A1 Journal article (refereed), original research

A novel process design for CO2 capture and H2S removal from the syngas using ionic liquid

Publication Details
Authors: Wang Yinglong, Liu Xiaobin, Kraslawski Andrzej, Gao Jun, Cui Peizhe
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Journal of Cleaner Production
Journal acronym: JCP
Volume number: 213
Start page: 480
End page: 490
Number of pages: 11
ISSN: 0959-6526
eISSN: 1879-1786
JUFO-Level of this publication: 2
Open Access: Not an Open Access publication


In coal chemical industry, sour gas removal from syngas using Rectisol technology is facing the problem of large cold energy consumption. In this work, a room-temperature process for sour gas removal from syngas is proposed. Ionic liquid is used as physical solvent. The study of ionic liquids shows that [bmim][Tf2N] is a suitable IL that can achieve the simultaneous removal of H2S and CO2 that makes the process more simple. The process is modeled and simulated and the results show a good performance which CO2 and H2S removal rate reaches 97.6% and 95.3%, respectively. Sensitivity analysis is carried out to study the influence of operating conditions on process performance, it provides the basic data for researchers to make decisions. Compared with the Rectisol process, the ionic liquid process has the advantage of operation at room temperature which saves large amount of energy used for refrigeration. Meanwhile, ionic liquid has low loss ration and low energy consumption in recovery. The comparison shows that ionic liquid is a good alternative to the cold methanol for CO2 capture and H2S removal on a large scale

Last updated on 2020-20-03 at 10:03