Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Feature: Ceramics Processing through Energy Consumption Reduction (Green Processing): Technical reports
Carbon oxidation activity of complex oxides (Part 2)—Characteristics of La0.9Ag0.1FeOα synthesized at low temperature using co-precipitation method—
Susumu NAKAYAMARyushiro TOKUNAGAMasaki SHIOMITakahiro NAKA
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2013 Volume 121 Issue 1409 Pages 95-99

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Abstract

The perovskite oxide, LaFeO3, was synthesized by different preparation methods, i.e., the calcination of co-precipitated precursors [La(Ag)–Fe–CO3 and La–Fe–CO3] and a mixture of La2O3 and Fe2O3 (La–Fe–O). By using the solution of Ag, the formation temperature (600°C) of the LaFeO3 single phase obtained by the calcining of La(Ag)–Fe–CO3 was about 500°C lower than that of La–Fe–CO3. The formation temperature of the LaFeO3 single phase of La–Fe–O was 1100°C as well as that of La–Fe–CO3. Their carbon oxidations were investigated by DSC (differential scanning calorimetry) measurements. The DSC exothermic peak of La0.9Ag0.1FeOα obtained by the calcining of La(Ag)–Fe–CO3 at 700°C occurred at 409°C and showed a higher carbon oxidation activity when compared to LaFeO3 (477 and 562°C) obtained by the calcining of La–Fe–CO3 and La–Fe–O at 1100°C. The carbon oxidation activation energies observed for the non-catalyzed and catalyzed reactions (mixture of La0.9Ag0.1FeOα) were 160 and 130 kJ·mol−1, respectively.

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© 2013 The Ceramic Society of Japan
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