RT Journal Article
ID 6f5c019068c6cbc3
A1 Wiheeb, Ahmed Daham 
A1 Ahmad, Mohd Azmier 
A1 Murat, Muhamad Nazri 
A1 Kim, Jin-Soo
A1 Othman, Mohd Roslee 
T1 SURFACE AFFINITY AND INTERDIFFUSIVITY OF CARBON DIOXIDE INSIDE HYDROTALCITE&minus;SILICA MICROPORES: CO<sub>2</sub> INTERDIFFUSION INSIDE HT&minus;Si MICROPORES
JF Journal of Porous Media
JO JPM
YR 2015
FD 2015-05-28
VO 18
IS 4
SP 379
OP 388
K1 natural gas
K1 hydrotalcite
K1 porous media
K1 diffusion
K1 permeability
K1 carbon dioxide
AB The different level of carbon dioxide diffusion in microporous hydrotalcite-silica membrane can be explained by the attractive forces between the molecules and the affinitive medium between molecules of different gas species and the molecular weight of the gases. For a molecular sieve membrane that exhibits high affinity for carbon dioxide, the gas transport in the membrane is predominantly surface adsorption. Pure carbon dioxide, despite the fact that it is heavier than hydrogen, nitrogen, and methane, is preferentially adsorbed (by losing more of its energy due to affinitive forces) onto the pore wall of hydrotalcite material in the membrane. Nitrogen gas can reduce the ability of carbon dioxide to be adsorbed and diffused into the membrane by as much as 1.9 kJ/mol at elevated pressure. The presence of the other two gases in the binary mixture can also perturb the ability of CO<sub>2</sub> to be adsorbed and diffused into the membrane micropores.
PB Begell House
LK https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,6147e63e31ad00a5,6f5c019068c6cbc3.html