Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (3): 513-519.DOI: 10.3724/SP.J.1088.2011.01124

• Research papers • Previous Articles    

Selective Hydrogenation of Crotonaldehyde over Pt/Ce0.8La0.2O1.9 Catalysts

CHEN Ping, XIE Guanqun, ZHENG Haiying, ZHU Lin, LUO Mengfei*   

  1. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
  • Received:2010-11-23 Revised:2011-01-06 Online:2011-03-04 Published:2014-08-01

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Abstract: The vapor-phase selective hydrogenation of crotonaldehyde was carried out over Pt/Ce0.8La0.2O1.9 catalysts prepared by impregnation. The catalysts were characterized by X-ray powder diffraction, temperature-programmed reduction, NH3 temperature- programmed desorption, and Raman spectroscopy. It was found that with increasing Pt loading in Pt/Ce0.8La0.2O1.9, both the activity (TOF) and selectivity for crotyl alcohol increased first and then decreased a little. The 3%Pt/Ce0.8La0.2O1.9 catalyst showed the highest activity (TOF) and selectivity for crotyl alcohol in hydrogenation of crotonaldehyde (4.01 × 10-3 s-1 and 53.6%, respectively). It was concluded that the catalytic performance of the catalysts depends on the surface acidity and the Pt particle size. Carbon deposition formed on the catalyst surface during the hydrogenaton process may account for the decrease in the catalytic activity and selectivity for crotyl alcohol.

Key words: platinum, supported catalyst, crotonaldehyde, selective hydrogenation, crotyl alcohol, carbon deposition