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Nanoflower‐like Cu/SiO 2 Catalyst for Hydrogenation of Ethylene Carbonate to Methanol and Ethylene Glycol: Enriching H 2 Adsorption
Author(s) -
Zhang Mengjiao,
Yang Youwei,
Li Antai,
Yao Dawei,
Gao Yueqi,
Fayisa Busha Assaba,
Wang MeiYan,
Huang Shouying,
Lv Jing,
Wang Yue,
Ma Xinbin
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202000365
Subject(s) - nanoflower , ethylene glycol , methanol , catalysis , selectivity , adsorption , dimethyl carbonate , ethylene , chemical engineering , chemistry , inorganic chemistry , materials science , organic chemistry , engineering
The hydrogenation of ethylene carbonate (EC) to produce methanol and ethylene glycol (EG) is one of the key steps in the promising route for CO 2 utilization on a large scale. However, the high H 2 /EC ratio in feed (usually as 200∼300) is generally required to achieve favorable catalytic activity, inducing the high cost for H 2 circulation in the industrial application. Here, we report a series of nanoflower‐like catalysts with curved fibers and open ends, among which the catalyst with the highest fiber density exhibited nearly 98 % EC conversion, 75 % methanol selectivity and over 99 % EG selectivity when the H 2 /EC ratio was decreased to 60. Combining the characterizations of active species distribution and high‐pressure H 2 adsorption, it is demonstrated that the nanoflower‐like morphology with dense fibers could remarkably enrich the hydrogen adsorption, consequently, accelerate the reaction rate and present an excellent performance at a low H 2 /EC ratio. These insights may provide instructive suggestions for further design of catalysts for the hydrogenation reactions.