H2O splitting via a two-step solar thermoelectrolytic cycle based on non-stoichiometric ceria redox reactions: Thermodynamic analysis

被引：19

作者：

Schieber, Garrett L. ^{[1
]}

Stechel, Ellen B. ^{[2
,3
]}

Ambrosini, Andrea ^{[4
]}

Miller, James E. ^{[4
]}

Loutzenhiser, Peter G. ^{[1
]}

机构：

[1] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA

[2] LightWorks, Tempe, AZ USA

[3] Arizona State Univ, Sch Mol Sci, Tempe, AZ 85281 USA

[4] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 30期

关键词：

H-2; production; Ceria; Solar thermoelectrolytic cycle; THERMOCHEMICAL HYDROGEN-PRODUCTION; SYNGAS PRODUCTION; SYSTEM EFFICIENCY; WATER; CO2; CONVERSION; REDUCTION; HEAT;

D O I：

10.1016/j.ijhydene.2017.06.098

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

H-2 production via a novel two-step solar thermoelectrolytic cycle based on non-stoichiometric ceria reduction/oxidation reactions is thermodynamically analyzed. The two-step cycle encompasses (1) the solar thermoelectrolytic reduction of ceria using a combination of concentrated solar irradiation, reduced partial pressure, and electricity from a photovoltaic array to increase the oxygen vacancy concentration in the sublattice and (2) the non-solar oxidation of non-stoichiometric ceria with H2O to produce H-2, or CO2 to produce CO. The re-oxidized ceria is returned to the first step to complete the cycle. A thermodynamic analysis that imposes first and second law constraints to determine optimal performance predicts a solar-to-fuel efficiency of 31.1% for a reduction temperature of 1424 K and a maximum oxygen vacancy concentration of 0.229. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：18785 / 18793

页数：9

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