载体对肉桂醛选择性加氢钴基催化剂的影响

以肉桂醛选择性加氢制肉桂醇为探针反应,通过反应筛选出对催化作用有利的载体,并确定催化剂的最佳负载量。催化剂表征结果表明,酸性载体较碱性载体好,在酸性载体中硅藻土具有更好的助催化作用,钴负载在硅藻土上的最佳负载质量分数为12%,载体存在颗粒效应及催化剂金属与载体存在强相互作用,载体影响催化剂的分布、晶体的形状及活性中心的多少。

Influence of carriers on performance of Co based catalysts for cinnamaldehyde selective hydrogenation

The carriers of Co based catalysts for cinnamaldehyde selective hydrogenation were selected and the optimal Co loadings on the catalysts were investigated using the reaction of cinnamaldehyde selec- tive hydrogenation to cinnamyl alcohol as a probe. The experimental results showed that acidic carriers were better than alkaline carriers;the diatomite had the best promoting effect of catalysis in acidic carriers and the optimal Co loading on the diatomite was 12% （mass fraction） ; the carriers possessed particle effects and there was the strong interaction force between the metal in catalysts and the carriers ; the carri- ers had influence on the distribution of catalyst, crystal shape and the number of active sites.