Properties of Nb-doped SrCo0.8Fe0.2O3-d perovskites in oxidizing and reducing environments / Podyacheva O. Yu.,Ismagilov Z. R.,Shmakov A. N.,Ivanov M. G.,Nadeev A. N.,Tsybulya S. V.,Rogov V. A. // CATALYSIS TODAY. - 2009. - V. 147, l. 3-4, SI. - P. 270-274.

ISSN/EISSN:

0920-5861 / нет данных

Type:

Article

Abstract:

The phase stability of SrCo0.8Fe0.2O3-d perovskite doped with niobium was studied by in situ high-temperature X-ray diffraction in the temperature range of 30-1000 degrees C and oxygen partial pressure 0.2-10(-5) atm. The stability of the cubic perovskite structure in a wide range of oxygen partial pressures is the main advantage of SrCo0.8-xFe0.2NbxO3-d (x = 0.1-0.3) system in comparison with SrCo0.8Fe0.2O3-d. It is suggested I hat equilibrium of the thermal expansion with changes of the oxygen non-stoichiometry leading to the same lattice parameters in the oxidizing and reducing environments at the catalytic temperatures is a necessary requirement for stable operation of perovskite as an oxygen-conducting membrane. In the case of SrCo0.8-xFe0.2NbxO3-d perovskite this condition is met at x = 0.2. This makes the SrCo0.6Fe0.2Nb0.2O3-d composition promising for application as oxygen-conducting membrane. (C) 2009 Elsevier B.V. All rights reserved.

Author keywords:

Perovskite; Membrane; Oxygen non-stoichiometry; Partial oxidation of methane OXYGEN PERMEATION; PARTIAL OXIDATION; MEMBRANE REACTOR; METHANE; SYNGAS; STABILITY; BA0.5SR0.5CO0.8FE0.2O3-DELTA; PERMEABILITY; TEMPERATURE; DIFFRACTION

DOI:

10.1016/j.cattod.2009.01.017

Web of Science ID:

ISI:000270667500016

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	OXYGEN PERMEATION; PARTIAL OXIDATION; MEMBRANE REACTOR; METHANE; SYNGAS; STABILITY; BA0.5SR0.5CO0.8FE0.2O3-DELTA; PERMEABILITY; TEMPERATURE; DIFFRACTION
Research-Areas	Chemistry; Engineering
Web-of-Science-Categories	Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
Author-Email	pod@catalysis.ru
ResearcherID-Numbers	Podyacheva, Olga/D-5194-2013 ismagilov, zinfer/L-9981-2013
ORCID-Numbers	ismagilov, zinfer/0000-0002-1520-9216
Funding-Acknowledgement	SB RAS Integration {[}82]
Funding-Text	This work is a continuation of the NWO-RFBR project and authors thank Dr. H.J.M. Bouwmeester for fruitful discussions. The authors thank V.I. Zaikovskii for the TEM studies of the samples. This study was supported by the SB RAS Integration project No.82.
Number-of-Cited-References	18
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	18
Journal-ISO	Catal. Today
Doc-Delivery-Number	505DA