Effect of Milling Time on the Cu/SiO<sub>2</sub> Monolithic Catalyst for Hydrogenation of Dimethyl Oxalate and the Adhesion of Washcoat

Abstract The Cu/SiO₂ monolithic catalyst was prepared by washcoating the slurry, which was obtained through milling the Cu/SiO₂ powder prepared by ammonia-evaporation method, onto the wall of the cordierite monoliths. Subsequently, the slurry and catalyst were characterized by laser particle size analyzer (LPSA), N₂ physical adsorption, mercury intrusion porosimetry (MIP), N₂O titration, X-ray diffraction (XRD), scanning electron microscope (SEM). The characterization results indicated that the milling time had little influence on the physicochemical properties and phase structure. However, increasing the milling time could modulate the particle size distribution of the slurry and improve the surface morphology of the catalyst. Then, the adhesion of washcoat was strengthened and the Cu/SiO₂ monolithic catalyst showed higher catalytic performance in hydrogenation of dimethyl oxalate to ethylene glycol.

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Keywords�� dimethyl oxalate�� ethylene glycol�� hydrogenation�� Cu/SiO₂�� monolithic�� milling time

Received 2013-05-21;

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Wang Bo, Zhao Shuo, Zhao Yujun, Wang Shengping, Ma Xinbin.Effect of Milling Time on the Cu/SiO₂ Monolithic Catalyst for Hydrogenation of Dimethyl Oxalate and the Adhesion of Washcoat[J] Chemcial Industry and Engineering, 2015,V32(2): 6-12

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