CO2 capture using a superhydrophobic ceramic membrane contactor
2015 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 496, 1-12 p., 13949Article in journal (Refereed) Published
The wetting and fouling of a membrane contactor deteriorated performance of the membrane gas absorption system for CO<inf>2</inf> post-combustion capture in coal-fired power plants. To solve these problems, in this study, a superhydrophobic ceramic (SC) membrane contactor was fabricated from an alumina tube with a ZrO<inf>2</inf> layer by means of grafting with fluoroalkylsilane (FAS) in a triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane solution. The performances of the SC membrane contactor and polypropylene (PP) hollow fiber membrane contactor were compared through experiments conducted in a CO<inf>2</inf> absorption experimental system using a monoethanolamine (MEA) aqueous solution. Although the membrane fabrication cost per effective membrane area (CPA) of the SC membrane is 12.5 times that of the PP hollow fiber membrane, the SC membrane fabrication cost per absorbed CO<inf>2</inf> flux (CPC) was lower than that of the PP membrane. For the SC membrane, the detrimental effect of wetting can be alleviated by periodic drying to ensure a high CO<inf>2</inf> removal efficiency (>90%). Drying does not work for the PP membrane because the swelling of the PP fibers is irreversible. The SC membrane contactor exhibited a better anti-fouling ability than the PP membrane contactor because the superhydrophobic surface can self-clean. To ensure a continuous, high-efficiency CO<inf>2</inf> removal, a method was proposed in which two-hollow fiber SC membrane contactors operate alternately with the addition of periodic drying. The SC hollow fiber membrane contactor shows great potential in real industrial CO<inf>2</inf> post-combustion capture because of its good anti-wetting and anti-fouling features.
Place, publisher, year, edition, pages
2015. Vol. 496, 1-12 p., 13949
capture, Membrane contactor, Superhydrophobic, Wetting, Alumina, Ceramic materials, Ceramic membranes, Coal, Coal combustion, Combustion, Drying, Ethanolamines, Fabrication, Fibers, Fossil fuel power plants, Gas absorption, Gas plants, Hydrophobicity, Polypropylenes, Solutions, Hollow fiber membrane contactors, Hollow fiber membranes, Membrane gas absorption, Post-combustion captures, Super-hydrophobic surfaces, Membranes, aluminum oxide, carbon dioxide, ethanolamine, polypropylene, silane derivative, triethoxy 1h, 1h, 2h, 2h tridecafluoro n octylsilane, unclassified drug, zirconium oxide, absorption, aqueous solution, Article, contact angle, electric power plant, general device, hollow fiber membrane, priority journal, scanning electron microscopy, spectroscopy, superhydrophobic ceramic membrane contactor, swelling, X ray photoemission and spectroscopy
IdentifiersURN: urn:nbn:se:kth:diva-175602DOI: 10.1016/j.memsci.2015.08.062ISI: 000363263900001ScopusID: 2-s2.0-84941194886OAI: oai:DiVA.org:kth-175602DiVA: diva2:866512
QC 201511032015-11-032015-10-192015-11-18Bibliographically approved