Preparation and characterization of SiO2 composite membranes for purification of hydrogen for PEMFC

Dong Wook Lee, Bongkuk Sea, Kwan Young Lee, Kew Ho Lee

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11 Citations (Scopus)

Abstract

Silica composite membranes were prepared for CO removal from products of methanol steam reforming. A porous stainless steel (SUS) support was used to improve the mechanical strength of the membrane. Supports were prepared by coating Ni-powder SiO2 sols with a particle size of 500 and 150 nm in turns on SUS. Silica top layer was coated on the modified support using a colloidal sol with nanoparticles or a polymeric sol. Density of the membrane surface was controlled by repeating dipping-drying or the whole process of dipping-drying-calcination, and the nanostructure of the top layer was controlled by changing the top layer material. As a result of a mixture gas permeation test of the silica composite membrane using H2(99%)/CO-(1%), the CO concentration of 10 000 ppm was reduced to under 81 ppm. The permeation mechanism through the membrane was mainly molecular sieving.

Original languageEnglish
Pages (from-to)3594-3600
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number15
Publication statusPublished - 2002 Jul 24

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ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

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