Synthesis and properties of A-type zeolite membranes by secondary growth method with vacuum seeding

Aisheng Huang, Y. S. Lin, Weishen Yang

Research output: Contribution to journalArticle

149 Scopus citations

Abstract

A-type zeolite membranes were successfully synthesized on tubular α-Al 2O 3 supports by secondary growth method with vacuum seeding. In the seeding process, a thin, uniform and continuous seeding layer was closely attached to the support surface by the pressure difference between the two sides of the support wall. The effects of seed particle size, suspension concentration, coating pressure difference and coating time on the membrane and its pervaporation properties were investigated. The as-synthesized membranes were characterized by XRD and SEM. The quality of the membranes was evaluated by the pervaporation dehydration of 95 wt.% isopropanol/water mixture at 343 K. High quality A-type zeolite membranes can be reproducibly prepared by the secondary growth method with vacuum seeding under the conditions: seed particle size of 500-1200 nm, suspension concentration of 4-8 g/l, coating pressure difference of 0.0100-0.0250 MPa and coating time of 45-180 s.

Original languageEnglish (US)
Pages (from-to)41-51
Number of pages11
JournalJournal of Membrane Science
Volume245
Issue number1-2
DOIs
StatePublished - Dec 1 2004
Externally publishedYes

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Keywords

  • A-type zeolite membrane
  • Coating
  • Hydrothermal synthesis
  • Pervaporation
  • Vacuum seeding

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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