Preparation of Thin Palladium Composite Membranes and Application to Hydrogen/Nitrogen Separation* * Supported by the National Natural Science Foundation of China (No.20425619).

Ke ZHANG, Huiyuan GAO, Zebao RUI, Jerry Lin, Yongdan LI

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Abstract

Thin palladium composite membranes were prepared by modified electroless plating method on α-alumina supports and a dense Pd/α-Al2O3 composite membrane with high hydrogen flux, good selectivity for hydrogen was obtained. It was tested in a single gas permeation system for hydrogen permeance and hydrogen selectivity over nitrogen. The hydrogen permeance of the corresponding membrane was as high as 2.45 × 10-6mol · m-2 · s-1 · Pa-1 and H2/N2 selectivity over 700 at 623K and a pressure difference of 0.1MPa. The main resistance of the composite membrane to H2 permeation lies in the aluminum ceramic support rather than the thin Pd layer.

Original languageEnglish (US)
Pages (from-to)643-647
Number of pages5
JournalChinese Journal of Chemical Engineering
Volume15
Issue number5
DOIs
StatePublished - Oct 1 2007

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Keywords

  • hydrogen separation
  • non-electrical plating
  • palladium membrane

ASJC Scopus subject areas

  • Environmental Engineering
  • Biochemistry
  • Chemistry(all)
  • Chemical Engineering(all)

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