Magnesioferrites for solar thermochemical fuel production

Kelvin Randhir; Nathan R. Rhodes; Like Li; Nicholas AuYeung; David W. Hahn; Renwei Mei; James F. Klausner

doi:10.1016/j.solener.2017.12.006

Magnesioferrites for solar thermochemical fuel production

Kelvin Randhir, Nathan R. Rhodes, Like Li, Nicholas AuYeung, David W. Hahn, Renwei Mei, James F. Klausner

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Solid solutions of iron oxide in MgO, prepared using the solid state reaction method (SSR), were investigated for solar thermochemical water splitting/carbon dioxide splitting (STC-WS/CDS). Experimental results show that 20 mole% magnetite (Fe₃O₄) in MgO has a hydrogen (H₂) production capacity of 6.12 ± 0.22 cm³ g⁻¹_{total material} when thermally reduced at 1450 °C (T_red) under an inert environment and oxidized at 1200 °C (T_ox) with excess steam. This compares favorably with cerium dioxide (CeO₂), which has proven to be an excellent STC-WS/CDS material, with H₂ production 2.91 ± 0.15 cm³ g⁻¹_{total material} at T_red = 1450 °C and T_ox = 1200 °C, and 4.34 ± 0.2 cm³ g⁻¹_{total material} at T_red = 1500 °C and T_ox = 1200 °C. 20 mole% Fe₃O₄ in MgO has advantages of lower operating temperature and higher production capacity. The partial pressure of oxygen (P_O2) during thermal reduction is on the order of 10⁻⁴ atm, which can be achieved using existing industrial vacuum pump technology. These advantages make this material a viable option for further study in solar thermochemical fuel production applications.

Original language	English (US)
Pages (from-to)	1-15
Number of pages	15
Journal	Solar energy
Volume	163
DOIs	https://doi.org/10.1016/j.solener.2017.12.006
State	Published - Mar 15 2018
Externally published	Yes

Keywords

Magnesium oxide doping
Recyclability
Sintering inhibiter
Thermochemical fuel production

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science

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10.1016/j.solener.2017.12.006

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title = "Magnesioferrites for solar thermochemical fuel production",

abstract = "Solid solutions of iron oxide in MgO, prepared using the solid state reaction method (SSR), were investigated for solar thermochemical water splitting/carbon dioxide splitting (STC-WS/CDS). Experimental results show that 20 mole% magnetite (Fe3O4) in MgO has a hydrogen (H2) production capacity of 6.12 ± 0.22 cm3 g−1total material when thermally reduced at 1450 °C (Tred) under an inert environment and oxidized at 1200 °C (Tox) with excess steam. This compares favorably with cerium dioxide (CeO2), which has proven to be an excellent STC-WS/CDS material, with H2 production 2.91 ± 0.15 cm3 g−1total material at Tred = 1450 °C and Tox = 1200 °C, and 4.34 ± 0.2 cm3 g−1total material at Tred = 1500 °C and Tox = 1200 °C. 20 mole% Fe3O4 in MgO has advantages of lower operating temperature and higher production capacity. The partial pressure of oxygen (PO2) during thermal reduction is on the order of 10−4 atm, which can be achieved using existing industrial vacuum pump technology. These advantages make this material a viable option for further study in solar thermochemical fuel production applications.",

keywords = "Magnesium oxide doping, Recyclability, Sintering inhibiter, Thermochemical fuel production",

author = "Kelvin Randhir and Rhodes, {Nathan R.} and Like Li and Nicholas AuYeung and Hahn, {David W.} and Renwei Mei and Klausner, {James F.}",

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T1 - Magnesioferrites for solar thermochemical fuel production

AU - Randhir, Kelvin

AU - Rhodes, Nathan R.

AU - Li, Like

AU - AuYeung, Nicholas

AU - Hahn, David W.

AU - Mei, Renwei

AU - Klausner, James F.

PY - 2018/3/15

Y1 - 2018/3/15

N2 - Solid solutions of iron oxide in MgO, prepared using the solid state reaction method (SSR), were investigated for solar thermochemical water splitting/carbon dioxide splitting (STC-WS/CDS). Experimental results show that 20 mole% magnetite (Fe3O4) in MgO has a hydrogen (H2) production capacity of 6.12 ± 0.22 cm3 g−1total material when thermally reduced at 1450 °C (Tred) under an inert environment and oxidized at 1200 °C (Tox) with excess steam. This compares favorably with cerium dioxide (CeO2), which has proven to be an excellent STC-WS/CDS material, with H2 production 2.91 ± 0.15 cm3 g−1total material at Tred = 1450 °C and Tox = 1200 °C, and 4.34 ± 0.2 cm3 g−1total material at Tred = 1500 °C and Tox = 1200 °C. 20 mole% Fe3O4 in MgO has advantages of lower operating temperature and higher production capacity. The partial pressure of oxygen (PO2) during thermal reduction is on the order of 10−4 atm, which can be achieved using existing industrial vacuum pump technology. These advantages make this material a viable option for further study in solar thermochemical fuel production applications.

AB - Solid solutions of iron oxide in MgO, prepared using the solid state reaction method (SSR), were investigated for solar thermochemical water splitting/carbon dioxide splitting (STC-WS/CDS). Experimental results show that 20 mole% magnetite (Fe3O4) in MgO has a hydrogen (H2) production capacity of 6.12 ± 0.22 cm3 g−1total material when thermally reduced at 1450 °C (Tred) under an inert environment and oxidized at 1200 °C (Tox) with excess steam. This compares favorably with cerium dioxide (CeO2), which has proven to be an excellent STC-WS/CDS material, with H2 production 2.91 ± 0.15 cm3 g−1total material at Tred = 1450 °C and Tox = 1200 °C, and 4.34 ± 0.2 cm3 g−1total material at Tred = 1500 °C and Tox = 1200 °C. 20 mole% Fe3O4 in MgO has advantages of lower operating temperature and higher production capacity. The partial pressure of oxygen (PO2) during thermal reduction is on the order of 10−4 atm, which can be achieved using existing industrial vacuum pump technology. These advantages make this material a viable option for further study in solar thermochemical fuel production applications.

KW - Magnesium oxide doping

KW - Recyclability

KW - Sintering inhibiter

KW - Thermochemical fuel production

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Magnesioferrites for solar thermochemical fuel production

Abstract

Keywords

ASJC Scopus subject areas

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