Predominant Gas Transport in Microporous Hydrotalcite–Silica Membrane

The prepared microporous hydrotalcite (HT)–silica membrane was found to exhibit the molecular sieving characteristic of pristine silica material and high CO 2 adsorption capacity of HT. The combined properties made enhanced CO 2 permeability and separability from CH 4 possible. The gas transport in...

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Bibliographic Details
Published in:Transport in porous media 2014-03, Vol.102 (1), p.59-70
Main Authors: Wiheeb, A. D., Ahmad, M. A., Murat, M. N., Kim, J., Othman, M. R.
Format: Article
Language:English
Subjects:
Adsorption
Carbon dioxide
Civil Engineering
Classical and Continuum Physics
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Gas transport
Geotechnical Engineering & Applied Earth Sciences
Hydrocarbons
Hydrogeology
Hydrology. Hydrogeology
Hydrology/Water Resources
Industrial Chemistry/Chemical Engineering
Membranes
Operating temperature
Pollution, environment geology
Sedimentary rocks
Selectivity
Silicon dioxide
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Summary:The prepared microporous hydrotalcite (HT)–silica membrane was found to exhibit the molecular sieving characteristic of pristine silica material and high CO 2 adsorption capacity of HT. The combined properties made enhanced CO 2 permeability and separability from CH 4 possible. The gas transport in the membrane was predominantly surface adsorption. The porous membrane overcame the Knudsen limitation and yielded the highest separation selectivity of 120 at 40 % CO 2 feed concentration, 30 ∘ C operating temperature, and 100 kPa pressure difference.
ISSN:0169-3913
1573-1634
DOI:10.1007/s11242-013-0261-8