Hydrogenation of Dimethyl Oxalate Using Extruded Cu/SiO2 Catalysts: Mechanical Strength and Catalytic Performance

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• 作者：Li Zhao ; Yujun Zhao ; Shengping Wang ; Hairong Yue ; Bo Wang ; Jing Lv ; Xinbin Ma
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：October 31, 2012
• 年：2012
• 卷：51
• 期：43
• 页码：13935-13943
• 全文大小：465K
• 年卷期：v.51,no.43(October 31, 2012)
• ISSN：1520-5045

文摘

In this work, the extrusion process of Cu/SiO₂ catalysts prepared by the ammonia-evaporation (AE) method has been investigated and optimized in order to obtain materials with convenient catalytic and mechanical properties for their application in the gas-phase hydrogenation reaction of dimethyl oxalate (DMO) to ethylene glycol (EG). Thereby, a variety of Cu/SiO₂ extrudates were prepared with different Cu loading. It has been observed that a special microstructure including defects, flaws, and discontinuities plays a significant role on the mechanical strength. Larger CuO grains may act as fracture origins, which negatively affect the mechanical strength. The 20Cu/SiO₂ extrudate with high Cu dispersion and high porosity is optimized for hydrogenation of DMO to EG, achieving a 98% conversion of DMO and 85% selectivity of EG under the liquid hourly space velocity (LHSV) of 1.0 h^鈥?.