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首页> 外文期刊>Chemistry: A European journal >Gallium Modified HUSY Zeolite as an Effective Co-support for NiMo Hydrodesulfurization Catalyst and the Catalyst's High Isomerization Selectivity
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Gallium Modified HUSY Zeolite as an Effective Co-support for NiMo Hydrodesulfurization Catalyst and the Catalyst's High Isomerization Selectivity

机译：镓改性侯西沸石作为Nimo加氢脱硫催化剂的有效共同载体和催化剂的高异构化选择性

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摘要

The effects of metal-modified acidic co-supports on the hydrodesulfurization (HDS) activity and isomerization selectivity of highly refractory organosulfur compounds such as 4,6-dimethyldibenzothiophene have been investigated. Y zeolite crystals with high Si/Al ratios and small crystallite sizes were successfully synthesized by a new hydrothermal synthesis approach. The synthesized Y zeolite crystals were ion-exchanged and stabilized. The prepared samples were then modified with different gallium contents using an impregnation method to adjust their acidity properties, and these modified samples were used as co-supports for NiMo sulfide HDS catalysts. The catalyst containing 10 wt.% zeolite Y modified by 2 wt.% gallium (NiMo/2GaY-ASA-A) exhibited the highest HDS activity, with 4,6-dimethyldibenzothiophene (4,6-DMDBT) conversion nearly double the rate of the catalyst without zeolite at 563 K, 4.0 MPa and liquid hourly space velocity (LHSV) of 40 h-1. NiMo/2GaY-ASA-A also exhibited superior isomerization ability, with 3,4'-DMBP, 4,4'DMBP, and 3,6-DMDBT as the main products, indicating that the isomerization pathway was the main reaction route over NiMo/ 2GaY-ASA-A. The superior catalytic performance is related to the synergistic effect of the proper amount of medium and strong Br?nsted acid sites. The compounds 3,6-DMDBT and 3,7-DMDBT (isomers of 4,6-DMDBT) and 3,4,6-TMDBT and tetra-methyl-DBT (transmethyl products) were detected simultaneously in the HDS product of 4,6-DMDBT for the first time over NiMo/GaY-ASA-A catalysts. Finally, a new reaction network over NiMo/2GaY-ASA-A was proposed.
机译：研究了金属改性酸性共同载体对高耐火有机脲化合物如4,6-二甲基二苯甲酸等加氢脱硫（HDS）活性和异构化选择性的影响。通过新的水热合成方法成功地合成了具有高Si ​​/ Al比率和小微晶尺寸的Zeolite晶体。合成的Y沸石晶体是离子交换和稳定的。然后使用浸渍方法改性制备的样品用不同的镓含量调节它们的酸度性能，并使用这些改性样品作为用于Nimo硫化物HDS催化剂的共同载体。含有10重量％的催化剂。％沸石Y改性2重量％镓（Nimo / 2gay-ASA-A）表现出最高的HDS活性，4,6-二甲基二苯甲酸噻吩（4,6-DMDBT）转化几乎增加了速率没有沸石的催化剂，在563k，4.0MPa和40h-1的液体时空速度（LHSV）。 Nimo / 2gay-ASA-A也表现出优异的异构化能力，3,4'-DMBP，4,4'DMBP和3,6-DMDBT作为主要产品，表明异构化途径是NIMO的主要反应路线/ 2gay-asa-a。优异的催化性能与适量培养基和强BRα的中间酸位点的协同效应有关。在4的HDS产物中同时检测化合物3,6-DMDBT和3,7-DMDBT（异构体4,6-DMDBT）和3,4,6-TMDBT和四甲基-DBT（衍生乙基产物），在Nimo / Gay-ASA-A催化剂上首次进行6-DMDBT。最后，提出了一种新的反应网络，提出了NIMO / 2Gay-ASA-A的新反应网络。

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  • 来源
    《Chemistry: A European journal》 |2017年第39期|共14页
  • 作者

    Wenwu Zhou; Yasong Zhou; Qiang Wei; Lin Du; Sijia Ding; Shujiao Jiang; Yanan Zhang; Qing Zhang;

  • 作者单位

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

    State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 (P. R. China);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    4; 6-DMDBT hydrodesulfurization; gallium-modified HUSY; isomerization; selectivity; transmethylation;

    机译：4;6-DMDBT加氢脱硫;镓改性的HALY;异构化;选择性;换甲基化;

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