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Effect of Calcination Temperature and Reaction Conditions on Methane Partial Oxidation Using Lanthanum-based Perovskite as Oxygen Donor by Xiaoping DAI; Changchun YU; Ranjia LI; Qiong WU; Kaijiao SHI; Zhengping HAO is a Materials Science article available to read on EtoBox.

What is Effect of Calcination Temperature and Reaction Conditions on Methane Partial Oxidation Using Lanthanum-based Perovskite as Oxygen Donor about?

We investigated the effect of calcination temperature, reaction temperature, and different amounts of replenished lattice oxygen on the partial oxidation of methane (POM) to synthesis gas using perovskite-type LaFeO 3 oxide as oxygen donor instead of gaseous oxygen, which was prepared by the sol-gel method, and the oxides were characterized by XRD, TG/DTA, and BET. The results indicated that the particle size increased with the calcination temperature increasing, while BET and CH 4 conversion declined with the calcination temperature increasing using LaFeO 3 oxide as oxygen donor in the absence of gaseous oxygen. CO selectivity remained at a high level such as above 92%, and increased slightly as the calcination temperature increased. Exposure of LaFeO 3 oxides to methane atmosphere enhanced the oxygen migration of in the bulk with time online owing to the loss of lattice oxygen and reduction of the oxidative stated Fe ion simultaneously. The high reaction temperature was favorable to the migration of oxygen species from the bulk toward the surface for the synthesis gas production with high CO selectivity. The product distribution and evolution for POM by sequential redox reaction

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Author

Xiaoping DAI; Changchun YU; Ranjia LI; Qiong WU; Kaijiao SHI; Zhengping HAO

Publisher

Elsevier Science; Elsevier ; The Metallurgical Industry Press; Elsevier BV (ISSN 1002-0721)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)