SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (11): 1570-1576.DOI: 10.1016/j.cjche.2016.04.032

• 第25届中国过程控制会议专栏 • 上一篇    下一篇

Effects of porous oxide layer on performance of Pd-based monolithic catalysts for 2-ethylanthraquinone hydrogenation

Xin Shi1, Enxian Yuan1, Guozhu Liu1,2, Li Wang1,2   

  1. 1 Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China
  • 收稿日期:2016-03-12 修回日期:2016-04-24 出版日期:2016-11-28 发布日期:2016-12-06
  • 通讯作者: Li Wang
  • 基金资助:

    Supported by the Sinopec Corp. Scientific Research Projects (414076).

Effects of porous oxide layer on performance of Pd-based monolithic catalysts for 2-ethylanthraquinone hydrogenation

Xin Shi1, Enxian Yuan1, Guozhu Liu1,2, Li Wang1,2   

  1. 1 Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China
  • Received:2016-03-12 Revised:2016-04-24 Online:2016-11-28 Published:2016-12-06
  • Contact: Li Wang
  • Supported by:

    Supported by the Sinopec Corp. Scientific Research Projects (414076).

摘要: Pd/oxide/cordieritemonolithic catalysts (oxide=Al2O3, SiO2 and SiO2-Al2O3)were prepared by the impregnation method. The results of ICP, XRD, SEM-EDX, XPS and N2 adsorption-desorption measurements revealed that the Pd penetration depth increased with increasing the thickness of oxide layer, and the catalysts with Al2O3 layers had the larger pore size than those with SiO2 and SiO2-Al2O3 layers. Catalytic hydrogenation of 2-ethylanthraquinone (eAQ), a key step of the H2O2 production by the anthraquinone process, over the various monolithic catalysts (60℃, atmosphere pressure) showed that themonolithic catalystwith the moderate thickness of Al2O3 layer (about 6 μm) exhibited the highest conversion of eAQ (99.1%) and hydrogenation efficiency (10.0 g·L-1). This could be ascribed to the suitable Pd penetration depth and the larger pore size,which provides a balance between the distribution of Pd and accessibility of active sites by the reactants.

关键词: Monolith, Catalyst, Hydrogenation, Anthraquinone, Hydrogen peroxide, Pd

Abstract: Pd/oxide/cordieritemonolithic catalysts (oxide=Al2O3, SiO2 and SiO2-Al2O3)were prepared by the impregnation method. The results of ICP, XRD, SEM-EDX, XPS and N2 adsorption-desorption measurements revealed that the Pd penetration depth increased with increasing the thickness of oxide layer, and the catalysts with Al2O3 layers had the larger pore size than those with SiO2 and SiO2-Al2O3 layers. Catalytic hydrogenation of 2-ethylanthraquinone (eAQ), a key step of the H2O2 production by the anthraquinone process, over the various monolithic catalysts (60℃, atmosphere pressure) showed that themonolithic catalystwith the moderate thickness of Al2O3 layer (about 6 μm) exhibited the highest conversion of eAQ (99.1%) and hydrogenation efficiency (10.0 g·L-1). This could be ascribed to the suitable Pd penetration depth and the larger pore size,which provides a balance between the distribution of Pd and accessibility of active sites by the reactants.

Key words: Monolith, Catalyst, Hydrogenation, Anthraquinone, Hydrogen peroxide, Pd