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Gas separation properties of crosslinked and non-crosslinked carboxymethylcellulose (CMC) membranes

Miremadi, S. I ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2013
  3. Abstract:
  4. In this study, crosslinked and non-crosslinked carboxymethylcellulose (CMC) membranes were prepared with different concentrations of polymer. Then, the permeability of pure CO2, N2, and CH4 was measured through these membranes in dry state to investigate the influence 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 effects of crosslinking reaction on permeability and permselectivity. The ATR-FTIR test was applied, and the peak at about 1108 cm-1 confirmed 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 Robeson's plots, the prepared CMC membranes would have potential for commercialization
  5. Keywords:
  6. Permselectivity ; Crosslinking ; Gas permeability ; Gases ; Membranes ; Polymers ; Carboxy methylcellulose ; Crosslinked carboxymethylcellulose ; Crosslinking reaction ; Feed pressure ; Gas permeation tests ; Gas separations ; Permselectivities ; Polymer concentrations ; Gas permeable membranes ; Cellulose ; Concentration (composition) ; Membrane ; Methane ; Permeability ; Polymer ; Pressure effect
  7. Source: Scientia Iranica ; Volume 20, Issue 6 , 2013 , Pages 1921-1928 ; 10263098 (ISSN)
  8. URL: http://www.scientiairanica.com/en/ManuscriptDetail?mid=128