Selective Hydrogenation of Citral over a Carbon-titania Composite Supported Palladium Catalyst  

作　　者：朱劼 鲁墨弘 李明时 朱建军 单玉华 

机构地区：[1]School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China

出　　处：《Chinese Journal of Chemistry》2011年第4期655-660,共6页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （No. 20976076） and the Natural Science Foundation of Jiangsu Province （No. BK2009536）.

摘　　要：A novel carbon-titania composite material, C/TiO2, has been prepared by growing carbon nanofibers （CNFs） on TiO2 surface via methane decomposition using Ni-Cu as a catalyst. The C/TiO2 was used for preparing supported palladium catalyst, Pd/C/TiO2. The support and Pd/C/TiO2 catalyst were characterized by BET, SEM, XRD and TG-DTG. Its catalytic performance was evaluated in selective hydrogenation of citral to citronellal, and compared with that of activated carbon supported Pd catalyst. It was found that the Pd/C/TiO2 catalyst contains 97% of mesopores. And it exhibited 88% of selectivity to citronellal at citral conversion of 90% in citral hydrogenation, which was much higher than that of activated carbon supported Pd catalyst. This result may be attributed to elimination of internal diffusion limitations, which were significant in activated carbon supported Pd catalyst, due to its microporous structure.A novel carbon-titania composite material, C/TiO2, has been prepared by growing carbon nanofibers （CNFs） on TiO2 surface via methane decomposition using Ni-Cu as a catalyst. The C/TiO2 was used for preparing supported palladium catalyst, Pd/C/TiO2. The support and Pd/C/TiO2 catalyst were characterized by BET, SEM, XRD and TG-DTG. Its catalytic performance was evaluated in selective hydrogenation of citral to citronellal, and compared with that of activated carbon supported Pd catalyst. It was found that the Pd/C/TiO2 catalyst contains 97% of mesopores. And it exhibited 88% of selectivity to citronellal at citral conversion of 90% in citral hydrogenation, which was much higher than that of activated carbon supported Pd catalyst. This result may be attributed to elimination of internal diffusion limitations, which were significant in activated carbon supported Pd catalyst, due to its microporous structure.

关 键 词：carbon-titania composite carbon nanofibers HYDROGENATION CITRAL internal diffusion 

分 类 号：TQ423.2[化学工程] TQ342.742