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Metal Oxide Reduction Using a Solar-Driven Vacuum Thermogravimeter

[+] Author Affiliations
Martina Neises-von Puttkamer, Michael Takacs, Philipp Haueter, Markus Maier

ETH Zurich, Zurich, Switzerland

Aldo Steinfeld

ETH Zurich, Zurich, SwitzerlandPaul Scherrer Institute, Villingen PSI, Switzerland

Paper No. ES2013-18050, pp. V001T10A003; 6 pages
doi:10.1115/ES2013-18050
From:
  • ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2013 7th International Conference on Energy Sustainability
  • Minneapolis, Minnesota, USA, July 14–19, 2013
  • Conference Sponsors: Advanced Energy Systems Division, Solar Energy Division
  • ISBN: 978-0-7918-5551-5
  • Copyright © 2013 by ASME

abstract

We present a kinetic study performed in a solar-driven vacuum thermogravimeter (solar-TG), in which solid reactants are directly exposed to high-flux irradiation while their weight change is continuously monitored. The system allows testing under a total vacuum pressure as low as 10 mbar. With this arrangement, the rate of thermochemical reactions can be examined under the same radiative heat transfer characteristics and heating rates typical of solar reactors. The solar-TG system is used to investigate metal oxides redox cycles for splitting H2O and CO2 and for high-temperature heat storage. Operation of the metal oxide reduction under vacuum pressures is of special interest because it eliminates the need for purge gas, thus simplifying the process and avoiding energy penalties associated with inert gas recycling.

Copyright © 2013 by ASME
Topics: Metals , Vacuum , Solar energy

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