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Support Effect in Supported Ni Catalysts on Their Performance for Methane Partial Oxidation

Support Effect in Supported Ni Catalysts on Their Performance for Methane Partial Oxidation Supported nickel catalysts were prepared by impregnation of La2O3, MgO and ZrO2 substrates and tested in the partial oxidation of methane to synthesis gas at atmospheric pressure. Nickel interacted strongly with La2O3 forming a deficient LaNiO3-δ perovskite structure upon calcination. Upon reduction at 973 K, the Ni/La2O3 catalysts that resulted were highly active and selective for syngas production. By contrast, a separate and readily reducible NiO phase was formed on the ZrO2 support. Because the interaction of metallic nickel particles on ZrO2 is weak, the catalysts underwent deactivation by sintering of metal particles during on-stream operation as confirmed by photoelectron spectroscopy. The relatively high activity of the Ni/MgO systems was associated with the formation of a highly stable cubic Ni-Mg-O solid solution, in which nickel remains highly dispersed during the methane partial oxidation reaction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Catalysis Letters Springer Journals

Support Effect in Supported Ni Catalysts on Their Performance for Methane Partial Oxidation

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References (26)

Publisher
Springer Journals
Copyright
Copyright © 2003 by Plenum Publishing Corporation
Subject
Chemistry; Physical Chemistry; Industrial Chemistry/Chemical Engineering; Pharmacy
ISSN
1011-372X
eISSN
1572-879X
DOI
10.1023/A:1023407609626
Publisher site
See Article on Publisher Site

Abstract

Supported nickel catalysts were prepared by impregnation of La2O3, MgO and ZrO2 substrates and tested in the partial oxidation of methane to synthesis gas at atmospheric pressure. Nickel interacted strongly with La2O3 forming a deficient LaNiO3-δ perovskite structure upon calcination. Upon reduction at 973 K, the Ni/La2O3 catalysts that resulted were highly active and selective for syngas production. By contrast, a separate and readily reducible NiO phase was formed on the ZrO2 support. Because the interaction of metallic nickel particles on ZrO2 is weak, the catalysts underwent deactivation by sintering of metal particles during on-stream operation as confirmed by photoelectron spectroscopy. The relatively high activity of the Ni/MgO systems was associated with the formation of a highly stable cubic Ni-Mg-O solid solution, in which nickel remains highly dispersed during the methane partial oxidation reaction.

Journal

Catalysis LettersSpringer Journals

Published: Oct 6, 2004

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