Mixed conducting materials for partial oxidation of hydrocarbons
authors Frade, JR; Kharton, VV; Yaremchenko, AA; Tsipis, EV; Shaula, AL; Naumovich, EN; Kovalevsky, AV; Marques, FMB
nationality International
journal BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
keywords ELECTROCHEMICAL PERMEABILITY; OXYGEN PERMEABILITY; CERAMIC MEMBRANES; STABILITY; TRANSPORT; PERMEATION; EXCHANGE; OXIDES; CO; CR
abstract Thermodynamic calculations with additional conditions for the conservation of carbon and hydrogen were used to predict the gas composition obtained by partial oxidation of methane as a function of oxygen partial pressure and temperature; this was used to assess the stability and oxygen permeability requirements of mixed conducting membrane materials proposed for this purpose. A re-examination of known mixed conductors shows that most materials with highest permeability still fail to fulfil the requirements of stability under reducing conditions. Other materials possess sufficient stability but their oxygen permeability is insufficient. Different approaches were thus used to attempt to overcome those limitations, including changes in composition in the A and B site positions of ABO(3) perovskites, and tests of materials with different structure types. Promising results were obtained mainly for some materials with perovskite or related K2NiF4-type structures. Limited stability of the most promising materials shows that one should rely mainly on kinetic limitations in the permeate side to protect the mixed conductor from severe reducing conditions.
publisher SOCIEDAD ESPANOLA CERAMICA VIDRIO
issn 0366-3175
year published 2004
volume 43
issue 3
beginning page 640
ending page 643
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000222515800006
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  impact metrics
journal analysis (jcr 2017):
journal impact factor 1.049
5 year journal impact factor 0.524
category normalized journal impact factor percentile 53.704
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