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Effect of Ce on the structural features and catalytic properties of La(0.9− x)CexFeO3perovskite-like catalysts for the high temperature water–gas shift reaction

Authors
Journal
International Journal of Hydrogen Energy
0360-3199
Publisher
Elsevier
Publication Date
Volume
36
Issue
1
Identifiers
DOI: 10.1016/j.ijhydene.2010.09.093
Keywords
  • High Temperature Water–Gas Shift (Ht-Wgs) Catalyst
  • La(0.9− X)Cexfeo3Perovskite-Like Catalyst
  • Ce Promoter
  • Hydrogen
  • Coal-Derived Syngas

Abstract

Abstract La (0.9− x) Ce x FeO 3 perovskite-like catalysts were investigated for the production of hydrogen from simulated coal-derived syngas via the water–gas shift reaction in the temperature range 450–600 °C and at 1 atm. These catalysts exhibited higher activity at high temperatures ( T ≥ 550 °C), compared to that of a commercial high temperature iron–chromium catalyst at 450 °C. Addition of a low Ce content ( x = 0.2), has little influence on the formation of the LaFeO 3 perovskite structure, but enhances catalytic activity especially at high temperatures with 19.17% CO conversion at 550 °C and 40.37% CO conversion at 600 °C. The LaFeO 3 perovskite structure and CeO 2 redox properties play an important role in enhancing the water-gas shift activity. Addition of a high Ce content ( x = 0.6) inhibits the formation of the LaFeO 3 perovskite structure and decreases catalyst activity.

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