Kinetics of the water-gas shift reaction over a La0.7Ce0.2FeO3 perovskite-like catalyst using simulated coal-derived syngas at high temperature

✍ Scribed by San Shwe Hla; Y. Sun; G.J. Duffy; L.D. Morpeth; A. Ilyushechkin; A. Cousins; D.G. Roberts; J.H. Edwards

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 598 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.10.015

✦ Synopsis

The kinetics of the water-gas shift (WGS) reaction over a novel La 0.7 Ce 0.2 FeO 3 perovskitelike catalyst is investigated using simulated coal-derived syngas at temperatures of 550 C and 600 C which are higher than the maximum operating temperature limit for conventional high temperature WGS catalysts. The influences of CO, CO 2 , H 2 O and H 2 concentration on WGS reaction rate are determined using selected gas compositions that might be encountered in a coal-based gasification system. An empirical power-law rate model used in this study is found to correlate well with experimental data with good accuracy. Kinetics parameters over La 0.7 Ce 0.2 FeO 3 obtained in this study are mostly in agreement with those previously measured using FeeCr based commercial catalysts in a range of relatively lower temperatures (300e500 C).