Effect of Surface Hydroxyl Content of Support on the Activity of Cu/ZSM-5 Catalyst for Low-Temperature Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

doi:10.1007/s10562-022-03980-x

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	Effect of Surface Hydroxyl Content of Support on the Activity of Cu/ZSM-5 Catalyst for Low-Temperature Hydrogenation of Dimethyl Oxalate to Ethylene Glycol
	Yun, Hongfei 1; Zhao, Yu 1,2; Kan, Xian 1; Li, Guixian 1,2
刊名	CATALYSIS LETTERS
	2022
关键词	Surface hydroxyl group Cu/ZSM-5 catalyst Dimethyl oxalate Hydrogenation Ethylene glycol
ISSN号	1011-372X
DOI	10.1007/s10562-022-03980-x
英文摘要	Cu/SiO2 catalyst prepared by the ammonia-evaporation (AE) method is the potential preferred catalyst for hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). Although significant advancements have been obtained in the confirmation and influence factors of active species in the hydrogenation process, the relationship between the catalytic activity and the sensitive factors in the preparation or pretreatment process of the catalyst is still uncertain. In this paper, Cu/ZSM-5 catalysts for DMO hydrogenation to EG were prepared by the AE method using ZSM-5 molecular sieve with high silicon-alumina ratio (1500) as a support. The ZSM-5 support was pretreated by drying at 393 K for different hours and it was found that the surface hydroxyl group of the support had significant influence on the structure and catalytic hydrogenation performance of the prepared Cu/ZSM-5 catalyst. The distribution of surface hydroxyl groups could be significantly changed by pre-drying the carrier, which further resulted in the change of the copper dispersion and surface properties of subsequent copper-supported catalysts. With the decrease of hydroxyl content on the surface of the ZSM-5 support, the prepared reduced Cu/ZSM-5 catalyst possessed smaller Cu-0 particles size, higher copper dispersion, higher surface area of Cu-0 and Cu+ species, but weakened surface acidity of the catalyst, which resulted in the great improvement of the catalytic activity. The DMO conversion and EG selectivity could reach 100% and 93% even under the low reaction temperature at 448 K over the Cu/ZSM-5-24 catalyst (based on the ZSM-5 support pretreated by drying for 24 h). In addition, the catalytic activity did not show obvious change after 300 h of reaction, probably due to the low temperature reaction and suitable surface properties of the catalyst. [GRAPHICS] .
WOS研究方向	Chemistry
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000772742400001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158096]
专题	石油化工学院
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yun, Hongfei,Zhao, Yu,Kan, Xian,et al. Effect of Surface Hydroxyl Content of Support on the Activity of Cu/ZSM-5 Catalyst for Low-Temperature Hydrogenation of Dimethyl Oxalate to Ethylene Glycol[J]. CATALYSIS LETTERS,2022.
APA	Yun, Hongfei,Zhao, Yu,Kan, Xian,&Li, Guixian.(2022).Effect of Surface Hydroxyl Content of Support on the Activity of Cu/ZSM-5 Catalyst for Low-Temperature Hydrogenation of Dimethyl Oxalate to Ethylene Glycol.CATALYSIS LETTERS.
MLA	Yun, Hongfei,et al."Effect of Surface Hydroxyl Content of Support on the Activity of Cu/ZSM-5 Catalyst for Low-Temperature Hydrogenation of Dimethyl Oxalate to Ethylene Glycol".CATALYSIS LETTERS (2022).