Efficiency maximization in solar-Thermochemical fuel production: Challenging the concept of isothermal water splitting

Ivan Ermanoski, J. E. Miller, M. D. Allendorf

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Widespread adoption of solar-Thermochemical fuel production depends on its economic viability, largely driven by the efficiency of use of the available solar resource. Herein, we analyze the efficiency of two-step cycles for thermochemical hydrogen production, with emphasis on efficiency. Owing to water thermodynamics, isothermal H2 production is shown to be impractical and inefficient, irrespective of reactor design or reactive oxide properties, but an optimal temperature difference between cycle steps, for which efficiency is the highest, can be determined for a wide range of other operating parameters. A combination of well-targeted pressure and temperature swing, rather than either individually, emerges as the most efficient mode of operation of a two-step thermochemical cycle for solar fuel production.

Original languageEnglish (US)
Pages (from-to)8418-8427
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number18
DOIs
StatePublished - May 14 2014

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fuel production
water splitting
Water
cycles
reactor design
hydrogen production
Hydrogen production
viability
Oxides
economics
temperature gradients
resources
Thermodynamics
Temperature
thermodynamics
Economics
oxides
water

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Efficiency maximization in solar-Thermochemical fuel production : Challenging the concept of isothermal water splitting. / Ermanoski, Ivan; Miller, J. E.; Allendorf, M. D.

In: Physical Chemistry Chemical Physics, Vol. 16, No. 18, 14.05.2014, p. 8418-8427.

Research output: Contribution to journalArticle

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