Bifunctional Catalysts for One-Step Conversion of Syngas into Aromatics with Excellent Selectivity and Stability

被引：512

作者：

Cheng, Kang ^{[1
]}

Zhou, Wei ^{[1
]}

Kang, Jincan ^{[1
]}

He, Shun ^{[1
]}

Shi, Shulin ^{[1
]}

Zhang, Qinghong ^{[1
]}

Pan, Yang ^{[2
]}

Wen, Wu ^{[2
]}

Wang, Ye ^{[1
]}

机构：

[1] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Natl Engn Lab Green Chem Product Alcohols Ethers, State Key Lab Phys Chem Solid Surfaces,Coll Chem, Xiamen 361005, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

来源：

CHEM | 2017年 / 3卷 / 02期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

FISCHER-TROPSCH SYNTHESIS; SYNTHESIS GAS; METHANOL SYNTHESIS; LOWER OLEFINS; PROPANE AROMATIZATION; PRODUCT SELECTIVITY; ZIRCONIUM DIOXIDE; CO2; CONVERSION; ACTIVE-SITES; LIQUID FUELS;

D O I：

10.1016/j.chempr.2017.05.007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Syngas (CO/H-2) is a key platform for chemical utilization of non-petroleum carbon resources. Among syngas transformation routes, the direct synthesis of aromatics, which are among the most important bulk chemicals, is less successful because of the limited selectivity and poor catalyst stability. We report a successful design of bifunctional catalysts composed of Zn-doped ZrO2 nanoparticles dispersed on zeolite H-ZSM-5 for one-step conversion of syngas to aromatics with high selectivity and stability. Aromatics with 80% selectivity at CO conversion of 20% were achieved, and there was no catalyst deactivation in 1,000 hr. Methanol and dimethyl ether were formed as major intermediates on Zn-doped ZrO2, which were subsequently converted into aromatics on H-ZSM-5 via olefins. We discovered a self-promotion mechanism of CO in the selective formation of aromatics. As well as being a reactant, CO facilitates the removal of hydrogen species formed on H-ZSM-5 in the dehydrogenative aromatization of olefins.

引用

页码：334 / 347

页数：14

共 70 条

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