Abstract
A phase-inversion approach was used to manufacture Al2O3 hollow fibre supports, which were then sintered at 1723 K. The electroless plating technique is developed to prepare palladium-coated Al2O3 hollow fibre membranes for hydrogen separation. Three different scaling-up configurations were produced and tested: single membrane, membrane unit obtained by assembling three membranes, and advanced membrane module obtained by assembling twelve replaceable membranes. The hydrogen flux was investigated under vacuum and without vacuum using a feed gas of pure H2 (100%) and a binary feed gas mixture of H2 (80%) and CO2 (20%) at different feed gas pressures (100–800 kPa), feed gas rate (0.2–6.0 L min−1), and temperature (673–723 K). The hydrogen flux increases from 0.2162 mol m−2 s−1 (feed gas pressure = 600 kPa, feed gas rate = 0.2 L min−1) to 0.4487 mol m−2 s−1 (feed gas pressure = 800 kPa, feed gas rate = 6.0 L min−1) under the binary gas mixture at 723 K by switching from a single to the advanced membrane module, while the hydrogen purity remains above 97.5% throughout the experiment. Some aspects about the scalability of palladium-coated Al2O3 hollow fibre membranes for hydrogen separation are discussed.
Original language | English |
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Pages (from-to) | 391-401 |
Number of pages | 11 |
Journal | Journal of Industrial and Engineering Chemistry |
Volume | 114 |
DOIs | |
State | Published - 25 Oct 2022 |
Keywords
- AlO hollow fibre supports
- Electroless plating process
- Hydrogen separation properties
- Membrane module design
- Palladium coatings