Recent developments in fuel‐processing and proton‐exchange membranes for fuel cells |
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Authors: | He Bai WS Winston Ho |
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Affiliation: | William G Lowrie Department of Chemical and Biomolecular Engineering and Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210‐1178, USA |
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Abstract: | In recent years, great progress has been made in the development of proton‐exchange membrane fuel cells (PEMFCs) for both mobile and stationary applications. This review covers two types of new membranes: (1) carbon dioxide‐selective membranes for hydrogen purification and (2) proton‐exchange membranes; both of these are crucial to the widespread application of PEMFCs. On hydrogen purification for fuel cells, the new facilitated transport membranes synthesized from incorporating amino groups in polymer networks have shown high CO2 permeability and selectivity versus H2. The membranes can be used in fuel processing to produce high‐purity hydrogen (with less than 10 ppm CO and 10 ppb H2S) for fuel cells. On proton‐exchange membranes, the new sulfonated polybenzimidazole copolymer‐based membranes can outperform Nafion® under various conditions, particularly at high temperatures and low relative humidities. Copyright © 2010 Society of Chemical Industry |
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Keywords: | hydrogen purification facilitated transport membrane carbon dioxide removal water gas shift membrane reactor proton‐exchange membrane fuel cell |
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