多级孔ZSM-5分子筛的加氢脱硫性能

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英文篇名：Hydrodesulfurization performance of hierarchical ZSM-5 zeolites 作者：吴莉芳 ; 贺海明 英文作者：Wu Lifang;He Haiming;Dongying Vational College of Science and Technology; 关键词：催化化学 ; 多级孔 ; ZSM-5分子筛 ; 4 ; 6-二甲基二苯并噻吩 ; 加氢脱硫 英文关键词：catalytic chemistry;;hierarchical pore;;ZSM-5 zeolites;;4,6-dimethyldibenzothiophene;;hydrodesulfurization 中文刊名：GYCH 英文刊名：Industrial Catalysis 机构：东营科技职业学院; 出版日期：2019-05-15 出版单位：工业催化 年：2019 期：v.27;No.248 语种：中文; 页：GYCH201905013 页数：7 CN：05 ISSN：61-1233/TQ 分类号：65-71

摘要

以四头聚季铵盐为模板合成的多级孔ZSM-5分子筛为载体、Pd为金属组分制备新型介孔分子筛基Pd催化剂,考察其对4,6-二甲基二苯并噻吩的加氢脱硫活性,并与其他催化剂进行对比。结果表明,与常规ZSM-5分子筛基Pd催化剂和γ-Al_2O_3基Pd催化剂相比,以多级孔ZSM-5分子筛为载体制备的Pd催化剂表现出更高的加氢脱硫活性。该催化剂同时具有介孔和B酸中心,为4,6-二甲基二苯并噻吩的异构化和脱硫反应提供了更多的活性中心,使其能够发生甲基异构化反应,生成3,6-二甲基二苯并噻吩后进行氢解脱硫。
        Pd catalysts with hierarchical ZSM-5 zeolites prepared from multi-head group quaternary ammonium surfactants templates as supports were prepared and tested in hydrodesulfurization( HDS) of4,6-dimethyldibenzothiophene( 4,6-DM-DBT). Reaction results showed that compared with conventional ZSM-5-based Pd catalyst and γ-Al_2 O_3-based Pd catalyst,Pd catalysts with hierarchical porous ZSM-5 zeolites as support showed higher HDS activity. Mesopores and B acid centers in the as-prepared catalysts provided more active sites for HDS and isomerizaiton of 4,6-DM-DBT. 4,6-DM-DBT was converted to 3,6-dimethyldibenzothiophene by methyl isomerization and then desulfurized by hydrogenation.

引文

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