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The functionalities of Pt-Mo catalysts in hydrotreatment reactions

机译:Pt-Mo催化剂在加氢处理反应中的功能

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摘要

The catalytic functionalities of bimetallic Pt-Mo/γ-Al_2O_3 catalysts in hydrotreatment were studied by performing simultaneous and independent dibenzothiophene (DBT) hydrodesulfurization (HDS) and naphthalene hydrodearomatization (HDA) reactions as a function of the activating agent and the MoO_3 content. Pt-Mo/γ-Al_2O_3 catalysts always displayed a higher selectivity to both the direct route of desulfurization (DDS) of DBT and to HDS over HDA than the one exhibited by conventional C0M0 and NiMo/γ-Al_2O_3. It was established that for the Pt-Mo catalytic system, the selectivity DDS to the hydrogenation route of desulfurization of DBT can be indirectly described by the selectivity HDS/ HDA in simultaneous HDS-HDA catalytic tests. The model of an active phase composed of separated metallic Pt particles, PtS_x species, and sulfided Mo which can either act as independent or cooperative active centers seems to be suitable to explain both the observed kinetic trends and the synergy effect between Pt and Mo.
机译:通过同时和独立地进行二苯并噻吩(DBT)加氢脱硫(HDS)和萘加氢脱芳香化(HDA)反应作为活化剂和MoO_3含量的函数,研究了双金属Pt-Mo /γ-Al_2O_3催化剂在加氢处理中的催化功能。与传统的C0M0和NiMo /γ-Al_2O_3相比,Pt-Mo /γ-Al_2O_3催化剂对DBT的直接脱硫(DDS)和通过HDA的HDS始终显示出更高的选择性。已经确定,对于Pt-Mo催化系统,在同时进行的HDS-HDA催化试验中,选择性DDS可以通过选择性HDS / HDA间接描述对DBT脱硫加氢路线的选择性DDS。由分离的金属Pt颗粒,PtS_x物种和硫化的Mo组成的活性相模型既可以充当独立的活性中心,也可以充当合作的活性中心,这似乎既可以解释观察到的动力学趋势,又可以解释Pt和Mo之间的协同效应。

著录项

  • 来源
    《Fuel》 |2010年第5期|p.1012-1018|共7页
  • 作者单位

    Centro de Investigaciones en Catalisis (CICAT), Escuela de Ingenieria Quimica, Universidad Industrial de Santander (UIS), A.A. 678 Bucaramanga, Colombia;

    Centro de Investigaciones en Catalisis (CICAT), Escuela de Ingenieria Quimica, Universidad Industrial de Santander (UIS), A.A. 678 Bucaramanga, Colombia;

    Centro de Investigaciones en Catalisis (CICAT), Escuela de Ingenieria Quimica, Universidad Industrial de Santander (UIS), A.A. 678 Bucaramanga, Colombia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    HDS; HDA; direct route of desulfurization; selectivity; activating agent;

    机译:HDS;HDA;脱硫的直接途径;选择性活化剂;

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