Ni-La@mSiO_2催化剂的制备及其在二苯酮加氢反应中的性能  

Preparation of Ni-La@mSiO_2 catalyst and its catalytic performance in benzophenone hydrogenation

作　　者：牛立博[1] 褚晓宁 张淼[1] 褚海龙[1] 白国义[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2016年第4期369-373,386,共6页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21376060);河北省自然科学基金资助项目(B2016201167);河北省高等学校科学技术研究项目(QN2015037);保定市科学技术研究与发展指导计划(15ZG001)

摘　　要：采用水合肼还原法制备了镍核,并结合Stber法制备了镧改性的核壳结构镍基纳米催化剂NiLa@mSiO_2,应用于二苯酮的选择性加氢反应.应用BET、XRD和TEM等测试手段对所制备催化剂的结构特征进行了表征.考察了反应时间对Ni-La@mSiO_2作用下二苯酮选择性加氢性能的影响,发现在氢压2.5 MPa,反应温度120℃、反应时间120min的条件下,二苯酮的转化率和二苯甲醇的选择性都达到90%以上;同时,催化剂经5次套用,二苯酮的转化率和二苯甲醇的选择性均没有发生明显下降,表明该催化剂具有良好的稳定性.The La modified Ni-La@mSiO2 core-shell catalyst was prepared by hydration hydrazine re- duction and St6ber method.The catalytic performance of the as-prepared catalyst was tested by hydrogena- tion of benzophenone to benzhydrol.BET,XRD and TEM were used to investigate the structure character- istics of the catalyst.The influence of the reaction time on the selective hydrogenation of benzophenone over Ni-La @mSiO2 were investigated and optimized. The conversion of benzophenone and selectivity of henzhydrol were both over 90% ,while the hydrogen pressure was 2.5 MPa,the reaction temperature was 120 ℃ and the reaction time was 120 min. Furthermore, there was no significant decline of the catalyst when it was recycled for five runs, indicating the good stability of this catalyst.

关 键 词：核壳结构 加氢 二苯酮 稳定性 

分 类 号：O614[理学—无机化学]