Insight into the positive effect of Cu0/Cu+ ratio on the stability of Cu-ZnO-CeO2 catalyst for syngas hydrogenation

被引：51

作者：

Si, Congcong ^{[1
]}

Ban, Hongyan ^{[1
]}

Chen, Kuo ^{[1
]}

Wang, Xiaoyue ^{[1
]}

Cao, Ruiwen ^{[1
]}

Yi, Qun ^{[1
]}

Qin, Zhifeng ^{[1
]}

Shi, Lijuan ^{[1
]}

Li, Zhong ^{[1
]}

Cai, Weijie ^{[2
]}

Li, Congming ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Key Lab Coal Sci & Technol, Minist Educ & Shanxi Prov, Taiyuan 030024, Shanxi, Peoples R China

[2] Dalian Polytech Univ, Fac Light Ind & Chem Engn, Dalian 116023, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2020年 / 594卷

基金：

中国国家自然科学基金;

关键词：

Methanol; Syngas hydrogenation; CZCe; Cu-0/Cu+; Stability; VAPOR-PHASE HYDROGENATION; UNSUPPORTED COPPER-CATALYSTS; METHANOL SYNTHESIS; CO2; HYDROGENATION; DIMETHYL OXALATE; CU/ZNO/ZRO2; CATALYSTS; ACTIVE-SITES; METAL-IONS; SURFACE; CU;

D O I：

10.1016/j.apcata.2020.117466

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cu-ZnO based catalysts are of industrial importance for methanol synthesis. In this work, Cu-ZnO-CeO2 (CZCe) catalyst has been prepared via conventional co-precipitation technique and applied for syngas hydrogenation to methanol with the purpose to study the effect of reversible redox metal oxide (ceria) on the distribution of valence state of active Cu species. Herein, CZCe catalyst exhibited the outstanding catalytic performance with initial methanol yield as high as 0.665 g.g(-1) cat. .h(-1) and the STYMEOH could well be maintained with a high value (0.600 g.g(-1) cat. .h(-1)) at 230 degrees C after 70 h of evaluation, which exceeded the reference Cu-ZnO-Al2O3 (CZAl) catalyst prepared by the same method. The excellent performance could be attributed to ceria doping tended to dynamically tune the distributions and/or concentrations of Cu+ and Cu degrees species on the catalyst surfaces and retard the conversion of Cu delta+ (delta < 2) to Cu2+ in the process of reaction.

引用

页数：10