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HomeNano Hybrids and CompositesNano Hybrids and Composites Vol. 21Silica Modified Membrane for Carbon Dioxide...

Silica Modified Membrane for Carbon Dioxide Separation from Natural Gas

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Abstract:

A dip-coating technique was applied to prepare a selective membrane on a commercial ceramic mesoporous support. Single gas components used for permeance and selectivity were CH₄, CO₂, H₂, He, N₂, and O₂ (BOC UK) with at least 99.999 (% v/v) purity. The permeances and selectivities were obtained at room temperature and transmembrane pressure differences between 0.05 up to 5.0 barg. Gas permeation experiments showed the permeance of CO₂to be strongly influenced by surface diffusion mechanism. Single gas experiment showed linear flow dependence on the inverse square root of molecular weight at room temperature and 1.0 barg. The single gas selectivities were found to be higher than the ideal Knudsen separation mechanism. The highest CO₂/CH₄ selectivity value of 24.07 was obtained at 0.7 barg and room temperature.

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Membranes and Membrane Technologies II

Nano Hybrids and Composites Vol. 21

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Periodical:

Nano Hybrids and Composites (Volume 21)

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43-52

DOI:

https://doi.org/10.4028/www.scientific.net/NHC.21.43

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Online since:

June 2018

Authors:

Mohammed Nasir Kajama*, Yilmaz Yildirim, Usman Habu Taura, Alhaji Shehu Grema, Shehu Abdulrahman

Keywords:

Carbon Dioxide Separation, Dip-Coating Technique, Silica Membrane, Single Gas Permeation, Single Gas Selectivity

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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