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Catalysts 2017, 7(3), 75; doi:10.3390/catal7030075

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
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)
View Full-Text   |   Download PDF [2021 KB, uploaded 25 February 2017]   |  

Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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