Multi-layer silica ceramic membrane for flue gas and natural gas separations.

Nwogu, Ngozi Claribelle; Orakwe, Ifeyinwa R.; Gobina, Edward

Abstract

The overall goal of this paper is to foster the development of new membrane technologies to improve manufacturing efficiency and reduce CO2 emissions. Hence, a multi-layered silica ceramic membrane with extremely low defect concentrations has been prepared through three successive dip-coating steps using a silica solution. An asymmetric structure is obtained by the deposition of silica layer on top of a combination titanium and {esc}ga{esc}s-Al2O3 support. The morphology of the three step homogenous silica layer is analysed by scanning electron microscope. The transport property of the membranes was carried out at room temperature and at pressure differences ranging from 1 to 2 bar. The fabricated membrane has reproducible high permeance for CO2. Interestingly, an almost equal flow rate was observed for CH4 and N2 at a pressure of 2 bar. Separation factors obtained from CO2/CH4 and CO2/N2 are comparatively higher than Knudsen separation values.

Citation

NWOGU, N.C., ORAKWE, I.R. and GOBINA, E. 2015. Multi-layer silica ceramic membrane for flue gas and natural gas separations. In Ao, S.I., Gelman, L., Hukins, D.W.L., Hunter, A. and Korsunsky, A.M. (eds.) Proceedings of the 2015 World congress on engineering and computer science (WCECS 2015), 21-23 October 2015, San Francisco, USA. Lecture notes in engineering and computer science, 2220. Hong Kong: Newswood Limited [online], pages 651-655. Available from: http://www.iaeng.org/publication/WCECS2015/WCECS2015_pp651-655.pdf

• Conference Name: 2015 World congress on engineering and computer science (WCECS 2015)
• Conference Location: San Francisco, USA
• Start Date: Oct 21, 2015
• End Date: Oct 23, 2015
• Acceptance Date: Aug 7, 2015
• Online Publication Date: Oct 21, 2015
• Publication Date: Oct 23, 2015
• Deposit Date: Mar 23, 2017
• Publicly Available Date: Mar 23, 2017
• Print ISSN: 2078-0958
• Electronic ISSN: 2078-0966
• Publisher: Newswood Academic Publishing
• Pages: 651-655
• Series Title: Lecture notes in engineering and computer science
• Series Number: 2220
• Series ISSN: 2078-0966
• ISBN: 9789881404725
• Keywords: Carbon dioxide; Flue gas; Natural gas; Silica membrane; Separation factor
• Public URL: http://hdl.handle.net/10059/2239
• Publisher URL: http://www.iaeng.org/publication/WCECS2015/