Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (1): 121.

• Preface • Previous Articles     Next Articles

Selective Hydrogenation of Acetic Acid to Acetaldehyde over SBA-15 Supported Iron Oxide Catalysts

ZHANG Xue-Zheng, YUE Ying-Hong, GAO Zi   

  1. Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
  • Received:2002-03-26 Online:2003-01-24 Published:2003-01-24

Abstract: A series of SBA-15 supported α-Fe2O3 catalysts were prepared and characterized. The influence of iron oxide loading, reduction temperature and reaction temperature on the catalytic activity and selectivity for the selective hydrogenation of acetic acid to acetaldehyde was investigated. The highest yield of acetaldehyde over the supported catalysts is 42.7%, whereas that over non-supported α-Fe2O3 is only 32.2%. The hydrogenation catalysts need to be prereduced before reaction. The optinum reduction temperatures for α-Fe2O3 and the supported catalyst are 873 and 923 K, respectively. The selective hydrogenation to acetaldehyde is favored when Fe3O4 and Fe0 coexist on the catalyst surface, and acetaldehyde is likely formed via a Mars-van Krevelen reaction mechanism.

Key words: Iron oxide, SBA-15 molecular sieve, Selective hydrogenation, Acetic acid, Acetaldehyde

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