Author/Authors :
Miremadi، S.I. نويسنده MS student in Energy Engineering at sharif university of technology , , Sha abadi، N. نويسنده MS student in Chemical Engineering at sharif university of tehchnology , , Mousavi.، S.A.. نويسنده he is an assistant professor of Polymer Engineering at Sharif University of Technology. , , Amini-Fazl، M.S. نويسنده student in Polymer Engineering at Iran Polymer and Petrochemical Institute ,
Abstract :
In this study, crosslinked and non-crosslinked carboxymethylcellulose (CMC)
membranes were prepared with di erent concentrations of polymer. Then, the permeability
of pure CO2, N2, and CH4 was measured through these membranes in dry state to
investigate the in
uence of polymer concentration and applied feed pressure on permeability
and permselectivity. The permeability of CO2 through membranes was higher than the
other gases. A comparison of permeabilities revealed that the permeability of N2, CO2,
and CH4 increased on an average of 33, 40 and 20 percent, respectivly, by increasing the
feed pressure from 6 to 10 bar. Increasing CMC concentration from 1.2 to 3.0 wt%, the
permeability of N2, CO2, and CH4 decreased on an average of 25, 12 and 19 percent,
respectivly. Also, the CO2/CH4 and CO2/N2 permselectivities increased 9 and 18 percent,
respectivly, with an increment in CMC concentration from 1.2 to 3 wt%. The crosslinked
CMC membranes with the same polymer concentrations were also prepared to investigate
the e ects of crosslinking reaction on permeability and permselectivity. The ATR-FTIR test
was applied, and the peak at about 1108 cm??1 con rmed the presence of corsslinker groups.
The comparision of gas permeation test results for crosslinked and non-crosslinked CMC
membranes showed that the gas permeability decreased and its permselectivity increased
due to crosslinking reaction. According to Robesonʹs plots, the prepared CMC membranes
would have potential for commercialization.
