Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Investigation of Sr0.7Ca0.3FeO3 oxygen carriers with variable cobalt B-site substitution

Journal Article · · ChemSusChem
 [1];  [2];  [1];  [1];  [1];  [2];  [2]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA (United States). Leidos Research Support Team
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)

A-site and B-site substitution have shown to be effective methods towards improving well-studied oxygen carrier materials that are vital for emerging gasification technologies. This includes SrFeO3, which greatly benefits from the inclusion of calcium and/or cobalt, leading to reports regarding Sr0.8Ca0.2Fe0.4Co0.6O3 as the best-performing composition. In this work, we investigate systems with higher calcium and lower cobalt contents to lessen the societal and economic burdens of these dual-doped carriers. We perform density functional theory calculations to illustrate the Fe-O bonding and relaxation contributions towards the oxygen vacancy formation energy in Sr1-xCaxFe1-yCoyO3 systems (x = 0.1875, 0.25, 0.3125; y = 0.125, 0.25, 0.375, 0.5) and determine that an increased calcium A-site substitution requires the use of less cobalt B-site doping to reach the same oxygen vacancy formation.. Experimentally, we validate these findings by focusing our characterization on bulk Sr0.7Ca0.3Fe1-yCoyO3 materials using in situ and ex situ XRD, O2-TPD, and TGA. We find that Sr0.7Ca0.3Fe0.7Co0.3O3 has a similar O2 cycling efficiency to Sr0.8Ca0.2Fe0.4Co0.6O3 in our experiments. Additionally, both materials are outperformed by Sr0.7Ca0.3Fe1-yCoyO3 systems with y = 0-0.10 at 400-500 °C, which cycle 1.5 wt.% O2 in under ten minutes.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
89243318CFE000003
OSTI ID:
1843196
Alternate ID(s):
OSTI ID: 1804592
OSTI ID: 1783887
OSTI ID: 1890479
Report Number(s):
84
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Journal Issue: 8 Vol. 14; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

High temperature sorption separation of air for producing oxygen-enriched CO2 stream journal January 2006
Equilibrium of oxygen sorption on perovskite-type lanthanum cobaltite sorbent journal March 2003
A‐ and B‐site Codoped SrFeO 3 Oxygen Sorbents for Enhanced Chemical Looping Air Separation journal December 2019
Oxygen separation from air by the combined temperature swing and pressure swing processes using oxygen storage materials Y1−x(Tb/Ce)xMnO3+δ journal August 2020
Effect of synthesis method on oxygen adsorption/desorption properties of La–Sr–Co–Fe–O perovskite-type oxide journal July 2014
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Oxygen storage capacity of La1−xA′xBO3 perovskites (with A′=Sr, Ce; B=Co, Mn)—relation with catalytic activity in the CH4 oxidation reaction journal June 2005
Effective Ca2+-doping in Sr1-xCaxFeO3-δ oxygen carriers for chemical looping air separation: A theoretical and experimental investigation journal January 2021
Oxygen desorption behavior of sol-gel derived perovskite-type oxides in a pressurized fixed bed reactor journal September 2017
Electrical conductivity and thermal expansion of La0.8Sr0.2(Mn,Fe,Co)O3-δ perovskites journal October 2006
Evaluation of BaY1−Pr Mn2O5+δ oxides for oxygen storage technology journal September 2014
Oxygen storage capability in Co- and Fe-containing perovskite-type oxides journal April 2014
Sr 1– x Ca x FeO 3-δ as a New Oxygen Sorbent for the High-Temperature Pressure-Swing Adsorption Process journal March 2016
SrCo x Fe 1– x O 3−δ Oxygen Sorbent Usable for High-Temperature Pressure-Swing Adsorption Process Operating at Approximately 300 °C journal May 2016
Remarkable Oxygen Intake/Release Capability of BaYMn 2 O 5+δ : Applications to Oxygen Storage Technologies journal May 2010
High-Temperature Oxygen Sorption in a Fixed Bed Packed with Perovskite-Type Ceramic Sorbents journal September 2003
A- and B-Site Substituted Lanthanum Cobaltite Perovskite as High Temperature Oxygen Sorbent. 1. Thermogravimetric Analysis of Equilibrium and Kinetics journal November 2007
Redox chemistry of CaMnO 3 and Ca 0.8 Sr 0.2 MnO 3 oxygen storage perovskites journal January 2017
Isothermal relaxation kinetics for the reduction and oxidation of SrFeO 3 based perovskites journal January 2020
Materials design of perovskite solid solutions for thermochemical applications journal January 2019
Temperature tunability in Sr 1−x Ca x FeO 3−δ for reversible oxygen storage: a computational and experimental study journal January 2020
Substituted SrFeO 3 as robust oxygen sorbents for thermochemical air separation: correlating redox performance with compositional and structural properties journal January 2020
The optimal co-doping of SrFe 1−x Co x O 3−δ oxygen carriers in redox applications journal January 2020
An experimental and computational investigation of the oxygen storage properties of BaLnFe2O5+δ and BaLnCo2O5+δ (Ln = La, Y) perovskites journal January 2014
Evidence of ferroelectricity in SrFeO 3−δ journal December 2011
Density-Functional-Theory Modeling of Cation Diffusion in Bulk La 1 − x Sr x MnO 3 ± δ ( x = 0.0 – 0.25 ) for Solid-Oxide Fuel-Cell Cathodes journal October 2017
Special points for Brillouin-zone integrations journal June 1976
Ab initiomolecular dynamics for liquid metals journal January 1993
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Oxidation energies of transition metal oxides within the GGA + U framework journal May 2006
Ab initio energetics of La B O 3 ( 001 ) ( B = Mn , Fe, Co, and Ni) for solid oxide fuel cell cathodes journal December 2009
Generalized Gradient Approximation Made Simple journal October 1996
Cobalt in lithium-ion batteries journal February 2020
Reversible change in crystal structure of Ba(or Sr)FeO3-.DELTA. associated with oxygen sorption/desorption by pressure variation journal January 2010

Similar Records

Sr 1-x Ca x Fe 1-y Co y O 3-δ as facile and tunable oxygen sorbents for chemical looping air separation
Journal Article · Thu Apr 23 00:00:00 EDT 2020 · JPhys Energy · OSTI ID:1615873

On the cubic perovskites La{sub 0.2}Sr{sub 0.8}Cu{sub 0.4}M{sub 0.6}O{sub 3-y} (M = Co, Fe)
Journal Article · Tue Oct 31 23:00:00 EST 1995 · Journal of Solid State Chemistry · OSTI ID:486275