应用化学 ›› 2020, Vol. 37 ›› Issue (11): 1285-1292.DOI: 10.11944/j.issn.1000-0518.2020.11.200109

• 研究论文 • 上一篇    下一篇

CuZn/Al2O3催化γ-戊内酯加氢制1,4-戊二醇

刘强a,b, 赵振波a*, 张弨b, 赵凤玉b*   

  1. a长春工业大学化学与生命科学学院 长春 130012;
    b中国科学院长春应用化学研究所,电分析化学国家重点实验室 长春 130022
  • 收稿日期:2020-04-15 修回日期:2020-04-30 接受日期:2020-06-09 出版日期:2020-11-01 发布日期:2020-11-04
  • 通讯作者: 赵振波,教授; Tel:0431-85716671; E-mail:1710229261@qq.com; 研究方向:催化材料
    共同通讯联系人:赵凤玉,研究员; Tel:0431-85262410; E-mail:zhaofy@ciac.ac.cn; 研究方向:多相催化

Catalytic Conversion of γ-Valerolactone to 1,4-Pentanediol on CuZn/Al2O3 Catalyst

LIU Qianga,b, ZHAO Zhenboa*, ZHANG Chaob, ZHAO Fengyub*   

  1. aSchool of Chemistry and Life Science,Changchun University of Technology,Changchun 130012,China;
    bState Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2020-04-15 Revised:2020-04-30 Accepted:2020-06-09 Published:2020-11-01 Online:2020-11-04
  • Contact: ZHAO Zhenbo, professor; Tel:0431-85716671; E-mail:1710229261@qq.com; Research interests:catalytic materials
    Co-corresponding author:ZHAO Fengyu, professor; Tel:0431-85262410; E-mail:zhaofy@ciac.ac.cn; Research interests:heterogeneous catalysis

摘要: 生物质利用是缓解能源及环境危机的有效途径。 本文利用共沉积法制备了一系列CuZn/Al2O3催化剂,通过电感耦合等离子光谱(ICP)、X射线粉末衍射(XRD)、透射电子显微镜(TEM)、二氧化碳程序升温脱附(CO2-TPD)等表征技术对催化剂的结构及性质进行了表征。 重点讨论了还原温度对CuZn/Al2O3催化γ-戊内酯加氢反应催化性能的影响,研究发现还原温度显著影响催化剂的活性和选择性。 高温还原有利于γ-戊内酯加氢生成1,4-戊二醇,440 ℃还原的CuZn/Al2O3催化剂对1,4-戊二醇的选择性可高可达98%;而200 ℃还原的催化剂,在相似的转化率下1,4-戊二醇选择性仅为71%。 结合催化剂的结构分析,高温有利于ZnO的还原,促使催化剂表面生成新的活性位点,并改变了催化剂表面的酸碱性,促进了1,4-戊二醇的生成。

关键词: Cu基催化剂, 戊内酯, 戊二醇, 还原温度, 碱性位, 选择性

Abstract: Biomass conversion is one of the most effective ways for alleviating the energy and environmental crisis. A series of CuZn/Al2O3 catalysts was prepared by co-precipitation method and the structure and properties of the catalysts obtained were characterized by several techniques such as inductively coupled plasma (ICP), X-ray diffraction (XRD), transmission electron microscopy (TEM), and CO2-temperature programmed desorption (TPD). We focused our attention on the effects of reduction temperature on the catalytic performances of CuZn/Al2O3 catalysts in γ-valerolactone hydrogenation. It is found that reduction of temperature significantly influences the activity and selectivity of CuZn/Al2O3 catalysts, that is, the larger reduction temperature benefits for the formation of 1,4-pentanediol, and a high selectivity of 98% is achieved over the catalyst at 440 ℃, while it is only 71% on the catalyst reduced at 200 ℃. Based on the structure analysis of the catalyst, it is concluded that the high reduction temperature can promote the reduction of ZnO and generate new surface active sites and vary the surface basic-acid properties, thus result in the improvement of 1,4-pentanediol selectivity.

Key words: Cu-based catalysts, valerolactone, pentanediol, reduction temperature, basic sites, selectivity

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