Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3273-3277.doi: 10.3866/PKU.WHXB20101216
• CATALYSIS AND SURFACE STRUCTURE •
ZHENG Hai-Ying, XIE Guan-Qun, WANG Xiao-Xia, JIN Ling-Yun, LUO Meng-Fei
The project was supported by the Zhejiang Provincial Natural Science Foundation (Y4100300).
Pt catalysts supported on high specific surface area ZrO2 were prepared by the impregnation method and applied to the hydrogenation of crotonaldehyde in the gas phase at atmospheric pressure. The effects of Pt loading and reduction temperature on the catalytic properties of the Pt/ZrO2 catalysts were investigated. It was found that the 3Pt/ZrO2 catalyst with a mass fraction of 3% Pt and at a reduction temperature of 500 °C exhibited favorable catalytic performance for the selective hydrogenation of crotonaldehyde. The selectivity for crotyl alcohol reached 55% at 27% crotonaldehyde conversion. The catalysts were characterized by X-ray powder diffraction (XRD), CO chemisorption, and NH3 temperature programmed desorption (NH3-TPD). The results indicated that the catalytic performance depended on the strong Lewis acidic sites on the catalyst surface and a proper Pt particle size of ca 8 nm for the selective hydrogenation of crotonaldehyde to crotyl alcohol.