Effect of Ce on the structural features and catalytic properties of La(0.9−x)CexFeO3 perovskite-like catalysts for the high temperature water–gas shift reaction

✍ Scribed by Y. Sun; S.S. Hla; G.J. Duffy; A.J. Cousins; D. French; L.D. Morpeth; J.H. Edwards; D.G. Roberts

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 390 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.09.093

✦ Synopsis

La (0.9Àx) Ce x FeO 3 perovskite-like catalyst Ce promoter Hydrogen Coal-derived syngas a b s t r a c t La (0.9Àx) Ce x FeO 3 perovskite-like catalysts were investigated for the production of hydrogen from simulated coal-derived syngas via the wateregas shift reaction in the temperature range 450e600 C and at 1 atm. These catalysts exhibited higher activity at high temperatures (T ! 550 C), compared to that of a commercial high temperature ironechromium catalyst at 450 C. Addition of a low Ce content (x ¼ 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 ¼ 0.6) inhibits the formation of the LaFeO 3 perovskite structure and decreases catalyst activity.