高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (5): 1005-1012.doi: 10.7503/cjcu20180757

• 物理化学 • 上一篇    下一篇

CuO-WO3-ZrO2的结构和性质对苯甲醛加氢反应催化性能的影响

黄锐, 姚志龙(), 孙培永, 张胜红   

  1. 北京石油化工学院化学工程学院, 恩泽生物质精细化工北京市重点实验室, 北京 102617
  • 收稿日期:2018-11-09 出版日期:2019-04-18 发布日期:2019-04-18
  • 作者简介:

    联系人简介: 姚志龙, 男, 博士, 研究员, 主要从事生物质化工利用技术和石油化工技术方面的研究. E-mail: yaozl@bipt.edu.cn

  • 基金资助:
    国家自然科学基金青年基金(批准号: 21703012)和北京市教育委员会科技计划重点项目(批准号: KZ201010017001)资助.

Effect of Structure and Properties of CuO-WO3-ZrO2 on Hydrogenation Catalytic of Benzaldehyde

HUANG Rui, YAO Zhilong*(), SUN Peiyong, ZHANG Shenghong   

  1. College of Chemical Engineering, Beijing Key Laboratory of Enze Biomass Fine Chemicals, Beijing Institute of Petrochemical Technology, Beijing 102617, China
  • Received:2018-11-09 Online:2019-04-18 Published:2019-04-18
  • Contact: YAO Zhilong E-mail:yaozl@bipt.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation for Young Scholars of China(No.21703012) and the Scientific Research Project of Beijing Municipal Commission of Education, China(No.KZ201010017001)

摘要:

采用共沉淀法制备了不同CuO和WO3含量的CuO-WO3-ZrO2催化剂. 利用X射线衍射(XRD)、 扫描电子显微镜(SEM)、 X射线荧光光谱(XRF)、 N2气物理吸附、 氢气程序升温还原(H2-TPR)、 X射线光电子能谱(XPS)及程序升温脱附(TPD)等手段对催化剂的结构和表面性质进行了表征. 结果表明, WO3的引入可以调变ZrO2的晶型, 从而使催化剂的比表面积和孔径发生变化, 促进CuO在催化剂表面的分散, 并影响催化剂的酸碱性. 在苯甲醛加氢制备苯甲醇反应中, 以CuO质量分数为18%, WO3质量分数为10%的CuO-WO3-ZrO2为催化剂时苯甲醛单程转化率达到92.03%, 产物苯甲醇的选择性为94.76%.

关键词: CuO-WO3-ZrO2催化剂, 加氢, 苯甲醇, 苯甲醛

Abstract:

CuO-WO3-ZrO2 catalysts were prepared by co-precipitation method. Structures and surface properties of the catalysts were characterized by X-ray powder diffraction(XRD), scanning electron microscope(SEM), X-ray fluorescence(XRF), N2 physisorption, temperature programmed hydrogen reduction(H2-TPR), X-ray photoelectron spectroscopy(XPS) and temperature programmed desorption(TPD). Addition of WO3 into CuO-ZrO2 induced the transformation of ZrO2 from monoclinic to tetragonal phases, improved the dispersion of CuO species, changed the acid-base properties of the catalysts as well as the catalyst textural features such as surface area and the average pore diameter. As a consequence, the catalytic performance for the hydrogenation of benzaldehyde to benzyl alcohol was greatly promoted by the introduction of WO3. For the optimal catalyst containing 10%(mass fraction) CuO and 18%(mass fraction) WO3, the conversion of benzaldehyde and the selectivity to benzyl alcohol reached 94.76% and 92.03%, respectively.

Key words: CuO-WO3-ZrO2 Catalyst, Hydrogenation, Benzyl alcohol, Benzaldehyde

中图分类号: