4.7 Article

Cascading pressure thermal reduction for efficient solar fuel production

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

  1. U.S. Department of Energy Fuel Cell Technologies Program via the Solar Thermochemical Hydrogen (STCH) directive
  2. United States Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]

向作者/读者索取更多资源

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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