Experimental study of gas flux characteristics in a CO2 selective silica based modified membrane.
Nwogu, Ngozi Claribelle
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NWOGU, N.C., KAJAMA, M.N. and GOBINA, E. 2014. Experimental study of gas flux characteristics in a CO2 selective silica based modified membrane. International journal of advanced research in engineering and technology (IJARET) [online], 5(8), pages 1-9. Available from: http://www.iaeme.com/MasterAdmin/Journal_uploads/IJARET/VOLUME_5_ISSUE_8/IJARET_05_08_001.pdf
The purpose of membrane gas separation for CO2 capture from flue gas process is to reduce greenhouse emissions as well as associated environmental challenges globally. This study looks at gas separation in a single gas permeation experiment using CO2, O2, CH4 and N2 gases by means of a highly selective and permeable inorganic ceramic membrane. A fresh ceramic membrane has been prepared by dip-coating technique through immersion in a silica-based precursor solution for pore size modification and used for gas purification purposes. Results obtained show excellent performance of the silica based membrane for CO2 recovery applications through adsorptive transport mechanism. Effect of pressure drop on gas flux showed a linear proportionality. The gas flux has high CO2 flux of 1.71mols-1m-2 at room temperature in comparison to that of other gases. Further results show that CO2 permselectivity to that of N2 supported the theoretical Knudsen with a high selectivity factor of 3.83 confirming a reasonable capture of CO2 to that of N2 as a major component of a flue gas stream.