Ni-La@mSiO2催化剂的制备及其在二苯酮加氢反应中的性能

doi:10.3969/j.issn.1000-1565.2016.04.007

河北大学学报(自然科学版) ›› 2016, Vol. 36 ›› Issue (4): 369-373.DOI: 10.3969/j.issn.1000-1565.2016.04.007

Ni-La@mSiO₂催化剂的制备及其在二苯酮加氢反应中的性能

牛立博,褚晓宁,张淼,褚海龙,白国义

收稿日期:2016-04-28 出版日期:2016-07-25 发布日期:2016-07-25
通讯作者: 白国义(1975—),男,回族,河北沧州人,河北大学教授,博士,主要从事精细化工和催化领域研究.E-mail:baiguoyi@hotmail.com
作者简介:牛立博(1984—),男,河北保定人,河北大学讲师,博士,主要从事纳米催化剂的制备与性能研究. E-mail:libo_niu@126.com
基金资助:
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)

Preparation of Ni-La@mSiO₂ catalyst and its catalytic performance in benzophenone hydrogenation

NIU Libo,CHU Xiaoning,ZHANG Miao,CHU Hailong,BAI Guoyi

College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China

Received:2016-04-28 Online:2016-07-25 Published:2016-07-25

摘要/Abstract

摘要： 采用水合肼还原法制备了镍核,并结合Stöber法制备了镧改性的核壳结构镍基纳米催化剂Ni-La@mSiO₂,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@mSiO₂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120 min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.

关键词: 核壳结构, 加氢, 二苯酮, 稳定性

Abstract: The La modified Ni-La@mSiO₂ core-shell catalyst was prepared by hydration hydrazine reduction and Stöber method.The catalytic performance of the as-prepared catalyst was tested by hydrogenation of benzophenone to benzhydrol.BET,XRD and TEM were used to investigate the structure characteristics 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 benzhydrol 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.

Key words: core-shell, hydrogenation, benzophenone, stability

中图分类号:

O614

牛立博,褚晓宁,张淼,褚海龙,白国义. Ni-La@mSiO₂催化剂的制备及其在二苯酮加氢反应中的性能[J]. 河北大学学报(自然科学版), 2016, 36(4): 369-373.

NIU Libo,CHU Xiaoning,ZHANG Miao,CHU Hailong,BAI Guoyi. Preparation of Ni-La@mSiO₂ catalyst and its catalytic performance in benzophenone hydrogenation[J]. Journal of Hebei University (Natural Science Edition), 2016, 36(4): 369-373.

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Ni-La@mSiO₂催化剂的制备及其在二苯酮加氢反应中的性能

Preparation of Ni-La@mSiO₂ catalyst and its catalytic performance in benzophenone hydrogenation

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