期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 39, 期 25, 页码 13114-13117出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.06.143
关键词
Hydrogen; Thermochemical; Solar fuels; Carbon dioxide
资金
- U.S. Department of Energy Fuel Cell Technologies Program via the Solar Thermochemical Hydrogen (STCH) directive
- United States Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
Efficient two-step solar-thermochemical fuel production requires vacuum pumping or inert gas sweeping to lower the oxygen pressure in the thermal reduction step. Pumping is hampered by large oxygen volumetric flows, whereas sweeping is energy-intensive, requiring heat recovery at high temperature, and a dedicated inert gas purification plant. A novel pumping approach-using a cascade of chambers at successively lower pressures-is analyzed and shown to lead to over an order of magnitude pressure decrease compared to a single-chambered design. The resulting efficiency gains are substantial, and represent an important step toward practical and efficient solar fuel production on a large scale. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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