Hydrogen production from a DME reforming-membrane reactor using stainless steel-supported Knudsen membranes with high permeability

Sang Jun Park, Dong Wook Lee, Chang Yeol Yu, Kwan Young Lee, Kew Ho Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Stainless steel-supported composite membranes with the Knudsen-dominated permeation behavior were synthesized via the dipping-rolling-freezing-fast drying (DRFF) and soaking-rolling-freezing-fast drying (SRFF) method. A dimethyl ether (DME) steam reforming was performed in a membrane reactor using the stainless steel-supported Knudsen membrane (SKM) with remarkably high permeability. The Knudsen membrane with high permeability was used to improve DME conversion and hydrogen recovery. Compared to a conventional reactor, the DME conversion was improved up to 48% and the hydrogen recovery was 37-38% in the temperature range of 250-450 °C. Moreover, the DME steam reforming-membrane reactor was combined with water-gas shift (WGS) reaction in the permeate side of the membrane reactor to obtain high CO removal efficiency. As a result, the CO concentrations was significantly reduced to below 20 ppm in the permeate side of the membrane reactor via the WGS reaction in the temperature range of 300-450 °C.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalJournal of Membrane Science
Volume318
Issue number1-2
DOIs
Publication statusPublished - 2008 Jun 20

Keywords

  • DME steam reforming
  • Knudsen membranes
  • Water-gas shift reaction

ASJC Scopus subject areas

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

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