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Effects of SO2 on CO2 capture using a hollow fiber membrane contactor
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes. School of Sustainable Development of Society and Technology, Mälardalen University, Västerås, Sweden .
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2013 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, no SI, 755-764 p.Article in journal (Refereed) Published
Abstract [en]

Membrane gas absorption technology is a promising alternative to conventional technologies for the mitigation of acid gases. In this study, with a polypropylene (PP) hollow fiber membrane contactor as absorber and a packed column as stripper, the influence of SO2 on the CO2 capture from coal-fired power plant flue gas was investigated in an absorption-desorption experimental set-up using aqueous monoethanolamine (MEA) as the absorbent. The experimental results showed that the MEA loss per ton captured CO2 increased with the addition of SO2, resulting in sharp decreases in CO2 removal efficiency and mass transfer rate of CO2 after initial several days of operation. This tendency is mainly attributed to the promotional effect of SO2 on the degradation of MEA by the formation of sulfate. Thus, it is necessary to regenerate MEA using a reclaimer in this case. The respective SO2 concentrations at the outlets of absorber and stripper remained constant values of 24 and 120ppb throughout the operation although the CO2 removal efficiency decreased dramatically with time. This co-capture of CO2 and SO2 could play an important role in further desulfuration, thus alleviating the burden of desulfuration to some extent and benefiting the subsequent CO2 purification and storage. More progresses are greatly needed in high-efficiency and stable absorbents, high-efficiency reclaimer, and methods to reduce MEA loss by evaporation.

Place, publisher, year, edition, pages
2013. Vol. 112, no SI, 755-764 p.
Keyword [en]
Co-capture, CO2 capture, Desulfuration, Hollow fiber membrane contactor
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-136089DOI: 10.1016/j.apenergy.2012.11.052ISI: 000329377800081ScopusID: 2-s2.0-84884206611OAI: diva2:676211
4th International Conference on Applied Energy (ICAE), July 01-04, 2012, China

QC 20131205

Available from: 2013-12-05 Created: 2013-12-03 Last updated: 2014-02-10Bibliographically approved

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Yan, Jinyue
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