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Alkylation of benzene with methanol over hierarchical porous ZSM-5: synergy effects of hydrogen atmosphere and zinc modification

机译：苯二烯与甲醇烷基化在等级多孔ZSM-5：氢气氛的协同效应和锌改性

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摘要

The competitive reaction of methanol to olefins is difficult to be suppressed in benzene alkylation with methanol over hierarchical porous ZSM-5. The influence of ZnO content and different atmospheres on the catalytic performance of hierarchical porous ZSM-5 catalyst was investigated. The results indicated that the introduction of ZnO could form the Lewis acid sites of zinc species (ZnOH+) at the expense of the Bronsted acid sites, and the reduction of strong Bronsted acid would help to suppress the side reaction of methanol to olefins. However, the presence of ZnOH+ could catalyze the dehydrogenation reaction of light hydrocarbons to olefins which would result in the formation of coke under the nitrogen atmosphere, while the hydrogen atmosphere could inhibit the dehydrogenation ability of ZnOH+.
机译：在分层多孔ZSM-5上苯烷基化致苯烷基化难以抑制甲醇对烯烃的竞争反应。 研究了ZnO含量和不同气氛对等级多孔ZSM-5催化剂催化性能的影响。 结果表明，ZnO的引入可以以伪造酸部位为代价形成锌种类（ZnOH +）的路易斯酸部位，并且强扁平酸的还原将有助于抑制甲醇对烯烃的副反应。 然而，ZnOH +的存在可以催化光烃对烯烃的脱氢反应，这将导致在氮气氛下形成焦炭，而氢气氛可以抑制ZnOH +的脱氢能力。

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  • 来源
    《RSC Advances》 |2015年第41期|共6页
  • 作者

    Hu Hualei; Lyu Jinghui; Wang Qingtao; Zhang Qunfeng; Cen Jie; Li Xiaonian;

  • 作者单位

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

    Zhejiang Univ Technol Ind Catalysis Inst State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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