Macroporous SO42-/ZrO2-SiO2 Solid Superacid Catalyst: Preparation and Catalytic Property

作者：Hou Lin Xi^*; Yin Xi Jun; Long Neng Bing; Yang Shen Ji; Zhang Rui Feng

来源：Chinese Journal of Inorganic Chemistry, 2012, 28(2): 239-244.

• solid superacid
• SiO2 support
• ZrO2
• esterification
• macroporous material

A macroporous SO42-/ZrO2-SiO2 solid superacid catalyst was prepared by using a macroporous SiO2 as a support and by introduction of ZrO2 via the dipping-hydrolysis method. The physicochemical properties of the composite materials were characterized by SEM, FTIR and XRD. The results show that the silica support have a strong capillary effect. This effect favors the formation of thin film ZrO2 cover on the 3D silica layer and delays the growth and phase transition of ZrO2. Furthermore, the silica support with connected macroporous pores provides the composite material with double active sites, higher permeability and larger specific surface area. The material calcined at 550 degrees C is estimated to have H-0<-13.75, indicating a solid superacid catalyst. The results of esterification for n-butanol with acetic acid under different conditions show that the SO42-/ZrO2-SiO2 catalyst exhibits a better activity of esterification, and the better yield of n-butyl acetate (97%) is obtained with the H2SO4 concentration of 1.5 mol.L-1 and the calcination temperature of 550 degrees C.

• 出版日期2012-2-10
• 单位宁波大学