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Implications of Exceptional Material Kinetics on Thermochemical Fuel Production Rates

Davenport, Timothy C. and Yang, Chih-Kai and Kucharczyk, Christopher J. and Ignatowich, Michael J. and Haile, Sossina M. (2016) Implications of Exceptional Material Kinetics on Thermochemical Fuel Production Rates. Energy Technology, 4 (6). pp. 764-770. ISSN 2194-4288. http://resolver.caltech.edu/CaltechAUTHORS:20160229-162515327

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Abstract

Production of chemical fuels by solar-driven thermochemical cycling has recently generated significant interest for its potential as a highly efficient method of storing solar energy. Of particular interest is the thermochemical process using non-stoichiometric oxides, such as ceria. In this process a reactive oxide is cyclically exposed to an inert gas, typically at 1500 °C to induce the partial reduction of the oxide, and then exposed to an oxidizing gas of either H_2O or CO_2 at a temperature between 800–1500 °C to oxidize the oxide and release H_2 or CO. Conventional wisdom has held that material kinetics limit the fuel production rates. Herein we demonstrate that, instead, at 1500 °C the rates of both reduction and oxidation of ceria, and hence also the global fuel production rate, are limited only by thermodynamic considerations for any reasonable set of operating conditions. Thus, in terms of materials design, significant room exists for sacrificing material kinetics in favor of thermodynamic characteristics.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/ente.201500506DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/ente.201500506/abstractPublisherArticle
http://onlinelibrary.wiley.com/wol1/doi/10.1002/ente.201500506/suppinfoRelated ItemSupporting Information
ORCID:
AuthorORCID
Kucharczyk, Christopher J.0000-0002-4712-839X
Haile, Sossina M.0000-0002-5293-6252
Additional Information:© 2016 Wiley-VCH. Received: December 4, 2015. Version of Record online: 23 FEB 2016. This work was supported by the Advanced Research Projects Agency - Energy (award no. DE-AR0000182) of the U.S. Department of Energy and by the U.S. National Science Foundation (award no. CBET-1038307). Support for T.C.D. was provided by an EERE Postdoctoral Research Award. We gratefully acknowledge Prof. Jane H. Davidson for fruitful discussions and Stephen Wilke for assistance with equipment assembly.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AR0000182
NSFCBET-1038307
Energy Efficiency and Renewable Energy (EERE)UNSPECIFIED
Subject Keywords:ceria; fuels; mass transport; thermochemical cycle; water splitting
Record Number:CaltechAUTHORS:20160229-162515327
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160229-162515327
Official Citation:T. C. Davenport, C.-K. Yang, C. J. Kucharczyk, M. J. Ignatowich, S. M. Haile, Energy Technol. 2016, 4, 764.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64877
Collection:CaltechAUTHORS
Deposited By: SWORD User
Deposited On:01 Mar 2016 00:49
Last Modified:28 Apr 2017 16:06

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