Abstract
Development of high performance hydrogen-selective inorganic membrane has become an important requisite for the production of hydrogen, an energy carrier that could cater the ongoing energy revolution. This paper describes a novel, hybrid method to process high performance hydrogen perm-selective membranes by the rapid CVD modification of a sol-gel silica layer. The initial N2 permeance values through a membrane were brought down by four orders of magnitude to 2.74 × 10-10 mol m-2 s-1 Pa-1 within 5 min of CVD, while maintaining the H2 permeance values as high as 6.43 × 10-7 mol m-2 s-1 Pa-1 (H2/N2 = 2300). It is likely that the reduction in the CVD zone thickness achieved by the presence of pre-existing sol-gel silica layer is the reason for the rapid modification of the pore structure to high performance membranes.
Original language | English |
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Pages (from-to) | 5-9 |
Number of pages | 5 |
Journal | Journal of Membrane Science |
Volume | 297 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2007 Jul 5 |
Externally published | Yes |
Keywords
- CVD
- Hydrogen separation
- Membrane reactor
- Silica membranes
- Sol-gel
ASJC Scopus subject areas
- Biochemistry
- Materials Science(all)
- Physical and Theoretical Chemistry
- Filtration and Separation