An A- and B-Site Substitutional Study of SrFeO3–δ Perovskites for Solar Thermochemical Air Separation
Abstract
An A- and B-site substitutional study of SrFeO3–δ perovskites (A’xA1–xB’yB1–yO3–δ, where A = Sr and B = Fe) was performed for a two-step solar thermochemical air separation cycle. The cycle steps encompass (1) the thermal reduction of A’xSr1–xB’yFe1–yO3–δ driven by concentrated solar irradiation and (2) the oxidation of A’xSr1–xB’yFe1–yO3–δ in air to remove O2, leaving N2. The oxidized A’xSr1–xB’yFe1–yO3–δ is recycled back to the first step to complete the cycle, resulting in the separation of N2 from air and concentrated solar irradiation. A-site substitution fractions between 0 ≤ x ≤ 0.2 were examined for A’ = Ba, Ca, and La. B-site substitution fractions between 0 ≤ y ≤ 0.2 were examined for B’ = Cr, Cu, Co, and Mn. Samples were prepared with a modified Pechini method and characterized with X-ray diffractometry. The mass changes and deviations from stoichiometry were evaluated with thermogravimetry in three screenings with temperature- and O2 pressure-swings between 573 and 1473 K and 20% O2/Ar and 100% Ar at 1 bar, respectively. A’ = Ba or La and B’ = Co resulted in the most improved redox capacities amongst temperature- and O2 pressure-swing experiments.
- Authors:
-
[1];
[1];
[2];
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1725851
- Report Number(s):
- SAND-2020-12937J
Journal ID: ISSN 1996-1944; 692385
- Grant/Contract Number:
- AC04-94AL85000; EE0034250; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 22; Journal ID: ISSN 1996-1944
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; SrFeO3–δ; air separation; concentrated solar
Citation Formats
Farr, Tyler P., Nguyen, Nhu Pailes, Bush, H. Evan, Ambrosini, Andrea, and Loutzenhiser, Peter G. An A- and B-Site Substitutional Study of SrFeO3–δ Perovskites for Solar Thermochemical Air Separation. United States: N. p., 2020.
Web. doi:10.3390/ma13225123.
Farr, Tyler P., Nguyen, Nhu Pailes, Bush, H. Evan, Ambrosini, Andrea, & Loutzenhiser, Peter G. An A- and B-Site Substitutional Study of SrFeO3–δ Perovskites for Solar Thermochemical Air Separation. United States. https://doi.org/10.3390/ma13225123
Farr, Tyler P., Nguyen, Nhu Pailes, Bush, H. Evan, Ambrosini, Andrea, and Loutzenhiser, Peter G. Fri .
"An A- and B-Site Substitutional Study of SrFeO3–δ Perovskites for Solar Thermochemical Air Separation". United States. https://doi.org/10.3390/ma13225123. https://www.osti.gov/servlets/purl/1725851.
@article{osti_1725851,
title = {An A- and B-Site Substitutional Study of SrFeO3–δ Perovskites for Solar Thermochemical Air Separation},
author = {Farr, Tyler P. and Nguyen, Nhu Pailes and Bush, H. Evan and Ambrosini, Andrea and Loutzenhiser, Peter G.},
abstractNote = {An A- and B-site substitutional study of SrFeO3–δ perovskites (A’xA1–xB’yB1–yO3–δ, where A = Sr and B = Fe) was performed for a two-step solar thermochemical air separation cycle. The cycle steps encompass (1) the thermal reduction of A’xSr1–xB’yFe1–yO3–δ driven by concentrated solar irradiation and (2) the oxidation of A’xSr1–xB’yFe1–yO3–δ in air to remove O2, leaving N2. The oxidized A’xSr1–xB’yFe1–yO3–δ is recycled back to the first step to complete the cycle, resulting in the separation of N2 from air and concentrated solar irradiation. A-site substitution fractions between 0 ≤ x ≤ 0.2 were examined for A’ = Ba, Ca, and La. B-site substitution fractions between 0 ≤ y ≤ 0.2 were examined for B’ = Cr, Cu, Co, and Mn. Samples were prepared with a modified Pechini method and characterized with X-ray diffractometry. The mass changes and deviations from stoichiometry were evaluated with thermogravimetry in three screenings with temperature- and O2 pressure-swings between 573 and 1473 K and 20% O2/Ar and 100% Ar at 1 bar, respectively. A’ = Ba or La and B’ = Co resulted in the most improved redox capacities amongst temperature- and O2 pressure-swing experiments.},
doi = {10.3390/ma13225123},
journal = {Materials},
number = 22,
volume = 13,
place = {United States},
year = {Fri Nov 13 00:00:00 EST 2020},
month = {Fri Nov 13 00:00:00 EST 2020}
}
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