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Open AccessArticle

Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate

1
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
2
School of Chemistry and Chemical Engineering of Shihezi University, Shihezi 832000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Adam F. Lee, Jean-Philippe Dacquin and Karen Wilson
Catalysts 2017, 7(3), 75; https://doi.org/10.3390/catal7030075
Received: 6 January 2017 / Revised: 15 February 2017 / Accepted: 20 February 2017 / Published: 25 February 2017
(This article belongs to the Special Issue Mesostructured Materials and Their Catalytic Applications)
Cu/x-SiO2 catalysts with 4, 10, and 20 nm silica sols as supports was produced by ammonia evaporation method and characterized. Different nano-sized silica sols as supports significantly affected the structure and catalytic properties of the copper catalysts for ethylene glycol synthesis from dimethyl oxalate. Compared with Cu/20-SiO2 and Cu/4-SiO2 catalysts, the catalytic performance and stability of Cu/10-SiO2 catalyst were greatly enhanced. The Cu/10-SiO2 catalyst showed 99.9% conversion with 94% EG selectivity and a lifetime of over 3080 h if it is calculated by industrial weight liquid hourly space velocity (WLHSV) of 0.5 h−1. The Cu/10-SiO2 catalyst has one of the longest lifetimes among the catalysts and is a good alternative catalyst for this reaction. Improvement in the catalytic performance and stability of Cu/10-SiO2 is attributed to the proper SBET, Dp and larger dispersion of copper. In addition, the supports of Cu/10-SiO2 catalyst have smaller particles than that of Cu/20-SiO2; thus, the migration and growth of copper species in catalysts are restrained during the reaction. View Full-Text
Keywords: silica sol; ethylene glycol; hydrogenation; stability; lifetime silica sol; ethylene glycol; hydrogenation; stability; lifetime
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MDPI and ACS Style

Zhang, C.; Wang, D.; Zhu, M.; Yu, F.; Dai, B. Effect of Different Nano-Sized Silica Sols as Supports on the Structure and Properties of Cu/SiO2 for Hydrogenation of Dimethyl Oxalate. Catalysts 2017, 7, 75.

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