化工学报 ›› 2018, Vol. 69 ›› Issue (8): 3452-3459.DOI: 10.11949/j.issn.0438-1157.20180027

• 催化、动力学与反应器 • 上一篇    下一篇

Ni/ZrO2-SiO2催化剂催化乙酰丙酸加氢合成γ-戊内酯

王杰, 张因, 郭健健, 赵丽丽, 赵永祥   

  1. 山西大学化学化工学院, 精细化学品教育部工程研究中心, 山西 太原 030006
  • 收稿日期:2018-01-09 修回日期:2018-05-21 出版日期:2018-08-05 发布日期:2018-08-05
  • 通讯作者: 张因
  • 基金资助:

    国家自然科学基金青年科学基金项目(21303097);国家国际科技合作专项(2013DFA40460)。

γ-Valerolactone synthesis from levulinic acid hydrogenation over Ni/ZrO2-SiO2 catalyst

WANG Jie, ZHANG Yin, GUO Jianjian, ZHAO Lili, ZHAO Yongxiang   

  1. Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi, China
  • Received:2018-01-09 Revised:2018-05-21 Online:2018-08-05 Published:2018-08-05
  • Supported by:

    supported by the National Natural Science Foundation of China(21303097) and the International S&T Cooperation Program of China(2013DFA40460).

摘要:

分别以ZrO2、SiO2及ZrO2-SiO2复合氧化物为载体,采用等体积浸渍法制备了Ni含量为10%(质量分数)的催化剂,考察了其催化乙酰丙酸液相加氢性能。采用N2-物理吸附、NH3-TPD、H2-TPR、XRD、TEM等表征手段对催化剂进行了表征。研究结果表明,在所制备的催化剂上,乙酰丙酸先经C=O加氢生成4-羟基戊酸,后者快速脱水酯化为γ-戊内酯。Ni/ZrO2-SiO2催化剂较Ni/ZrO2与Ni/SiO2催化剂具有高的金属分散度和丰富的表面酸性中心,表现出高的C=O加氢活性以及优异的乙酰丙酸加氢合成γ-戊内酯性能。在反应温度为200℃,氢气压力4 MPa的反应条件下,乙酰丙酸的转化率达到100%,γ-戊内酯的选择性大于99.9%。

关键词: 乙酰丙酸, &gamma, -戊内酯, 催化加氢, Ni/ZrO2-SiO2

Abstract:

ZrO2、SiO2 and ZrO2-SiO2 oxide composite supported Ni catalysts with Ni content of 10%(mass) were prepared by incipient impregnation method and characterized by N2 physical adsorption, NH3-TPD, H2-TPR, XRD, TEM. The catalysts were evaluated for liquid phase hydrogenation of levulinic acid. The results showed that levulinic acid was first hydrogenated to 4-hydroxy valeric acid via C=O hydrogenation and γ-valerolactone was then produced by immediate esterification of 4-hydroxy valeric acid. Compared to Ni/ZrO2 and Ni/SiO2 catalysts, Ni/ZrO2-SiO2 catalyst exhibited highest dispersion of metallic Ni and most surface acid sites. As a result, the Ni/ZrO2-SiO2 catalyst demonstrated highest activity for C=O hydrogenation and superior performance for synthesis of γ-valerolactone via levulinic acid hydrogenation. 100% levulinic acid conversion and over 99.9% γ-valerolactone selectivity were achieved under reaction temperature of 200℃ and hydrogen pressure of 4 MPa.

Key words: levulinic acid, γ-valerolactone, catalytic hydrogenation, Ni/ZrO2-SiO2

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