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Ni/SiO2催化剂上月桂腈的加氢反应 预览 被引量:4

Hydrogenation of Lauronitrile over Ni/SiO2 Catalyst
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摘要 用溶胶-凝胶法制备了一系列负载型Ni/SiO2催化剂,采用X射线衍射、透射电子显微镜、低温N2吸附-脱附和H2吸附技术对催化剂进行了表征,并考察了该系列催化剂用于月桂腈加氢反应的性能。表征结果显示,载体SiO2及催化剂试样的孔径为5~10nm,Ni以金属单质或氧化态形式均匀分散在载体表面,颗粒粒径为5~15nm。活性评价结果表明,当Ni/SiO2催化剂中Ni的质量分数为28%时,催化活性最高,在H2分压2MPa、反应温度80℃、反应时间30min、搅拌转速700r/min的优化反应条件下,月桂腈的转化率为91.6%,伯胺的选择性为99.4%;该催化剂的稳定性好,反应20次后,月桂腈的转化率由91.6%降为88.5%,伯胺的选择性维持在98.0%以上。 A series of Ni/SiO2 catalysts were prepared by sol-gel method and used in hydrogenation of lauronitrile. Their structures and properties were characterized by means of XRD, TEM, low temperature N2 adsorption and desorption, and HE adsorption techniques. Pore size distributions of both SiO2 support and Ni/SiO2 catalyst were in the range of 5 - 10 nm. Nickel was evenly dispersed in the elementary and oxidized states on surface of support. Size distribution of the dispersed particles was in the range of 5 - 15 nm. Ni/SiO2 catalyst with Ni mass fraction 28% was the most active. Under optimal reaction conditions: hydrogen partial pressure 2 MPa, reaction temperature 80℃, reaction time 30 min and stirring speed 700 r/min, conversion of lauronitrile was 91.6% and selectivity to product primary dodecylamine was 99.4%. After the catalyst recycle for 20 times, conversion of lauronitrile was 88.5% and selectivity to primary amine was more than 98.0%.
作者 于清跃 武文良 Yu Qingyue, Wu Wenliang (1. State key Laboratory of Materials-Oriented Chemical Engineering ,College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing Jiangsu 210009, China;2. Nanjing College of Chemical Technology, Applied Chemical Engineering Centre of Jiangsu, Nanjing Jiangsu 210048, China)
出处 《石油化工》 CAS CSCD 北大核心 2009年第3期 304-309,共6页 Petrochemical Technology
基金 [基金项目]江苏省高校自然科学重大基础研究项目(07KJA53013) 江苏省高技术产业发展项目(JHZD05-007).
关键词 镍催化剂 硅胶 月桂腈 月桂胺 加氢 nickel catalyst silica gel lauronitrile dodecylamine hydrogenation
作者简介 于清跃(1970-),男,江苏省海安县人,硕士,讲师,电话15905160669,电邮qingyueyunj@126.com。 联系人:武文良,电话13851401998,电邮wwl@njut.edu.cn。
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参考文献16

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二级参考文献41

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同被引文献48

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