4.7 Article

Pervaporation separation of methanol/methyl tert-butyl ether mixtures using polyarylethersulfone with cardo membranes

Journal

SEPARATION AND PURIFICATION TECHNOLOGY
Volume 107, Issue -, Pages 211-218

Publisher

ELSEVIER
DOI: 10.1016/j.seppur.2013.01.039

Keywords

Pervaporation; Polyarylethersulfone with cardo; Methanol; Methyl tert-butyl ether

Funding

  1. National Nature Science Foundation of China [20976145, 21076170]
  2. Nature Science Foundation of Fujian Province of China [2009J01040, 2010I0013]
  3. research fund for the Doctoral Program of Higher Education [20090121110031]

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Membranes based on polyarylethersulfone with cardo (PES-C) were prepared for pervaporation (PV) separation of methanol (MeOH)/methyl tert-butyl ether (MTBE) mixtures. The membranes were characterized using wide angle X-ray diffraction (WAXRD), scanning electron microscopy (SEM) and contact angle metering. The swelling and mechanical properties of the membranes in MeOH/MTBE mixtures were studied. The degree of swelling (DS) was less than 7% originating from the good solvent proof and excellent mechanical properties of PES-C. N-methyl pyrrolidone (NMP) is found to be the optimum solvent for PES-C membrane preparation against N,N-dimethylformamide (DMF). The effect of annealing temperature and annealing time on the structure and PV performance of the PES-C membranes was thoroughly discussed. The results showed that increasing annealing temperature or annealing time would enhance MeOH permselectivity and reduce permeation flux. By varying feed MeOH content from 5 to 40 wt.%, permeation flux increased from 1.21 to 4.52 kg mu m m(-2) h(-1), and MeOH content in the permeate was almost constant. The permeation flux increased and MeOH permselectivity decreased with increasing feed temperature. (C) 2013 Elsevier B.V. All rights reserved.

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