The influence of composition on the functionality of hybrid CuO-ZnO-Al2O3/HZSM-5 for the synthesis of DME from CO2 hydrogenation

被引：25

作者：

Hu, Yubing ^{[1
]}

Zhang, Yajing ^{[1
]}

Du, Jie ^{[1
]}

Li, Chunyan ^{[1
]}

Wang, Kangjun ^{[1
]}

Liu, Lidong ^{[1
]}

Yu, Xinrui ^{[1
]}

Wang, Kai ^{[1
]}

Liu, Nan ^{[1
]}

机构：

[1] Shenyang Univ Chem Technol, Coll Chem Engn, Shenyang 110142, Liaoning, Peoples R China

来源：

RSC ADVANCES | 2018年 / 8卷 / 53期

关键词：

DIMETHYL ETHER SYNTHESIS; METHANOL SYNTHESIS; BIFUNCTIONAL CATALYST; HIGH-PERFORMANCE; SOLID-ACID; SYNGAS; CUO-ZNO-ZRO2; NANOCATALYST; CONVERSION; AL2O3;

D O I：

10.1039/c8ra04814b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of CuO-ZnO-Al2O3/HZSM-5 hybrid catalysts with different Cu/Zn ratios and disparate Al2O3 doping were prepared and characterized by XRD, BET, H-2-TPR, NH3-TPD and XPS techniques. The optimal Cu/Zn ratio is 7:3, and the introduction of a suitable amount of Al2O3 to form hybrid catalysts increased the BET specific area and micropore volume, facilitated the CuO dispersion, decreased the CuO crystallite size, increased the interaction between CuO and ZnO, enhanced the number of weak acid sites, altered the copper chemical state and improved the catalytic performance consequently. The highest CO2 conversion, DME selectivity and DME yield of 27.3%, 67.1% and 18.3%, respectively, were observed over the CZA(7)H catalyst. The suitable temperature of 260 degrees C and the appropriate space velocity of 1500 h(-1) for one-step synthesis of dimethyl ether (DME) from carbon dioxide (CO2) hydrogenation were also investigated. The 50 h stability of the CZA(7)H catalyst was also tested.

引用

页码：30387 / 30395

页数：9

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