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Dual Template Preparation of MFI Zeolites with Tuning Catalytic Properties in Alkylation of Mesitylene with Benzyl Alcohol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-14 , DOI: 10.1021/acs.iecr.8b04783 Xin Yan 1 , Baoyu Liu 2 , Jiajin Huang 2 , Ying Wu 1 , Huiyong Chen 3 , Hongxia Xi 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-14 , DOI: 10.1021/acs.iecr.8b04783 Xin Yan 1 , Baoyu Liu 2 , Jiajin Huang 2 , Ying Wu 1 , Huiyong Chen 3 , Hongxia Xi 1
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Meso- and microporous ZSM-5 zeolites were synthesized through combination of the tetrapropylammonium hydroxide (TPAOH) and single quaternary ammonium surfactant (Cph–ph–10–6) as dual templates. The structure-directing ability of Cph–ph–10–6 and TPA+ was investigated by density functional theory (DFT) calculation. By tuning the molar ratios of Cph–ph–10–6/TPAOH from 5/0 to 5/8, the structure-directing effects between Cph–ph–10–6 and TPA+ could be systematically modulated, resulting in the morphology of the mesoporous ZSM-5 zeolites changed from ultrathin nanosheets, through splint-like nanosheets, to condensed packing plates. In addition, the hierarchical ZSM-5 zeolites exhibited a greater catalytic activity in alkylation of mesitylene with benzyl alcohol compared with conventional ZSM-5 zeolite. The fine control of meso- and microporous structures of ZSM-5 zeolites by a simple one-step dual template synthesis approach allows the design of the desired catalysts for a green and sustainable future.
中文翻译：
MFI分子筛的双模板制备及其在苯甲醇与亚甲基苯烷基化反应中的催化性能
中孔和微孔ZSM-5沸石是通过将四丙基氢氧化铵（TPAOH）和单一季铵表面活性剂（C ph–ph–10-6）作为双重模板而合成的。通过密度泛函理论（DFT）计算研究了C ph–ph–10–6和TPA +的结构导向能力。通过将C ph–ph–10–6 / TPAOH的摩尔比从5/0调整为5/8，C ph–ph–10–6和TPA +之间的结构导向作用可以系统地调节分子筛，从而导致介孔ZSM-5沸石的形态从超薄纳米片，通过夹板状纳米片，变为浓缩的填充板。另外，与常规ZSM-5沸石相比，分级ZSM-5沸石在均三甲苯与苄醇的烷基化中表现出更大的催化活性。通过简单的一步式双模板合成方法对ZSM-5分子筛的介孔结构和微孔结构进行精细控制，可以设计出所需的催化剂，从而实现绿色，可持续的未来。
更新日期：2019-02-15
中文翻译：
MFI分子筛的双模板制备及其在苯甲醇与亚甲基苯烷基化反应中的催化性能
中孔和微孔ZSM-5沸石是通过将四丙基氢氧化铵（TPAOH）和单一季铵表面活性剂（C ph–ph–10-6）作为双重模板而合成的。通过密度泛函理论（DFT）计算研究了C ph–ph–10–6和TPA +的结构导向能力。通过将C ph–ph–10–6 / TPAOH的摩尔比从5/0调整为5/8，C ph–ph–10–6和TPA +之间的结构导向作用可以系统地调节分子筛，从而导致介孔ZSM-5沸石的形态从超薄纳米片，通过夹板状纳米片，变为浓缩的填充板。另外，与常规ZSM-5沸石相比，分级ZSM-5沸石在均三甲苯与苄醇的烷基化中表现出更大的催化活性。通过简单的一步式双模板合成方法对ZSM-5分子筛的介孔结构和微孔结构进行精细控制，可以设计出所需的催化剂，从而实现绿色，可持续的未来。
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