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Formation of cellulose acetate membrane for gas separation from binary dope system: Effect of shear rate

Rahman, S.A. and Ismail , A.F. and Rahman, W.A.W.A (2004) Formation of cellulose acetate membrane for gas separation from binary dope system: Effect of shear rate. In: Proceedings of Regional Symposium on Membrane Science and Technology 2004, 21-25 April 2004, Puteri Pan Pacific Hotel, Johor Bharu, Malaysia.

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Abstract

The membranes were developed from a binary dope system consists of cellulose acetate and N- methyl pyrrolidone and fabricated using a dry/wet phase inversion process. The effect of shear rate on cellulose acetate membrane was studied for the separation of H2/N2. N-hexane was used as solvents for solvent exchange process. Pure H2 and N2 were used as test gases in the permeation experiment. Various casting speed were applied which represents different shear in order to investigate the effect of fabrication conditions on the performance of the newly developed membranes. The results showed that cellulose acetate membranes developed from a binary dope system. It also exhibited a very promising characteristic for gas separation processes. Increase shear rate increases the membrane performance, which could be related to an increase in molecular orientation on the skin layer of the membranes. The mean pressure-normalize flux and selectivity of H2 was about 0.0016 GPU. The selectivity of and H2/N2 was about 49.28 at shear rate of about 213.33 s-1.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Gas separation, phase inversion, asymmetric membrane, cellulose acetate, shear rate
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:1057
Deposited By: Pn Norazana Ibrahim
Deposited On:23 Feb 2007 09:37
Last Modified:01 Jun 2010 02:50

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