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 language | English |
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Pages (from-to) | 123-128 |
Number of pages | 6 |
Journal | Journal of Membrane Science |
Volume | 318 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2008 Jun 20 |
Keywords
- DME steam reforming
- Knudsen membranes
- Water-gas shift reaction
ASJC Scopus subject areas
- Biochemistry
- General Materials Science
- Physical and Theoretical Chemistry
- Filtration and Separation