Highly Selective Hydrodeoxygenation of Dibenzofuran into Bicyclohexane over Hierarchical Pt/ZSM-5 Catalysts,Industrial & Engineering Chemistry Research

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Highly Selective Hydrodeoxygenation of Dibenzofuran into Bicyclohexane over Hierarchical Pt/ZSM-5 Catalysts
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-02-10 , DOI: 10.1021/acs.iecr.0c05488
Xiaoxue Li _{1,

2} , Xiaopo Niu _{1,

2} , Shuaikang Zhu _{1,

2} , Shuang Xu _{1,

2} , Zheyuan Wang _{1,

2} , Xiangwen Zhang _{1,

2} , Qingfa Wang _{1,

2}

Affiliation

Fabricating zeolite-supported catalysts with excellent catalytic performance for hydroconversion of bio-oils into high-quality fuels is still a great challenge. Herein, hierarchical ZSM-5 zeolites were successfully synthesized with 3-[(trimethoxysilyl) propyl] octadecyldimethylammonium chloride as a mesoporous template. The hierarchical ZSM-5 supported Pt catalysts (Pt/HZ-x) were used to enhance the hydrodeoxygenation of dibenzofuran into bicyclohexane, and the influence of acidity distribution on the reaction pathways was investigated by tailoring the Si/Al molar ratios (50, 75, and 100). For all catalysts, cycloalkanes were produced via the partial hydrogenation of the aromatic rings to generate tetrahydrodibenzofuran, followed by the cleavage of C—O bond. The optimal bicyclohexane selectivity (86.8%) was obtained on Pt/HZ-75 catalyst due to the good synergistic effect between metal dispersion and acid distribution. This catalyst also showed excellent stability because of its strong metal–support interactions. Even after reused five times, the catalytic activity was almost unchanged compared with the fresh one. Furthermore, the possible reaction pathways for conversion of dibenzofuran into bicyclohexane over Pt/HZ-x catalysts were developed.

中文翻译：

分层Pt / ZSM-5催化剂上二苯并呋喃的高选择性加氢脱氧成双环己烷

制备具有优异的催化性能以将生物油加氢转化为高质量燃料的沸石负载催化剂仍然是一个巨大的挑战。在此，以3-[（（三甲氧基甲硅烷基）丙基]十八烷基二甲基氯化铵作为中孔模板成功地合成了分级的ZSM-5沸石。分级ZSM-5负载的Pt催化剂（Pt / HZ- x）用于增强二苯并呋喃的加氢脱氧成双环己烷，并通过调整Si / Al摩尔比（50、75和100）研究了酸度分布对反应路径的影响。对于所有催化剂，通过芳族环的部分氢化以生成四氢二苯并呋喃，然后裂解CO键来产生环烷烃。由于Pt / HZ-75催化剂在金属分散液和酸分布之间具有良好的协同作用，因此获得了最佳的双环己烷选择性（86.8％）。该催化剂还具有出色的金属-载体相互作用，因此具有出色的稳定性。即使重复使用五次，其催化活性也与新鲜的相比几乎没有变化。此外，在Pt / HZ-上二苯并呋喃转化为双环己烷的可能反应途径x催化剂被开发出来。

更新日期：2021-02-24

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