A study of gas diffusion characteristics on a micro porous composite silica ceramic membrane.

Nwogu, Ngozi Claribelle; Kajama, Mohammed; Gobina, Edward

doi:10.1016/j.compstruct.2015.07.121

A study of gas diffusion characteristics on a micro porous composite silica ceramic membrane.

Nwogu, Ngozi Claribelle; Kajama, Mohammed; Gobina, Edward

Authors

Ngozi Claribelle Nwogu

Mohammed Kajama

Edward Gobina

Abstract

The purpose of this study is to investigate gas permeation behaviour of five gases (CO2, He, H2, N2 and Ar) across two silica modified ceramic membranes, Membrane Y and Membrane Z. An examination of the variations in their layer thickness and flow rate was determined. Solution-dip coating process was used for the modification process specifically for pore size reduction. This resulted in some level of modifications in the layer thickness after a successive dipping time as well as flow rate in relation to pressure drop. The effect of number of dips generally influenced the layer thickness of both membranes. Membrane Y layer thickness through five successive dipping was in the range of 89.2-36μm while Membrane Z ranges between 150.72 and 43.69μm. Gas permeability as a function of mean pressure for Membrane Z was calculated using data obtained experimentally. The permeation tests confirmed the contribution of both Knudsen and viscous flow mechanism with an estimation and prediction of the membrane pore radius.

Citation

NWOGU, N.C., KAJAMA, M. and GOBINA, E. 2015. A study of gas diffusion characteristics on a micro porous composite silica ceramic membrane. Composite structures [online], 134, pages 1044-1050. Available from: https://doi.org/10.1016/j.compstruct.2015.07.121

Journal Article Type	Article
Acceptance Date	Aug 18, 2015
Online Publication Date	Aug 18, 2015
Publication Date	Dec 15, 2015
Deposit Date	Feb 29, 2016
Publicly Available Date	Aug 19, 2016
Journal	Composite Structures
Print ISSN	0263-8223
Electronic ISSN	1879-1085
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	134
Pages	1044-1050
DOI	https://doi.org/10.1016/j.compstruct.2015.07.121
Keywords	Ceramic membrane; Gas diffusion; Dip coating; Knudsen flow & viscous flow
Public URL	http://hdl.handle.net/10059/1394