Abstract
Cu/SiO2 catalysts were prepared by separate impregnation and deposition precipitation methods for the hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). XRD, TEM, H2-TPR, SEM, EDS and N2 physisorption were performed to characterize the textural and structural properties of the catalysts. The results showed that Cu particles from the deposition precipitation preparation were homogeneously dispersed on the support and their sizes were found to be smaller than those from the impregnation method and the catalyst produced by the deposition precipitation method gave higher EG yields at lower reaction temperatures and lower H2/DMO mole ratio. XRD patterns of Cu/SiO2 catalysts prepared by two methods a Cu/SiO2 (I) after calcination, b Cu/SiO2 (I) after reduction, c Cu/SiO2 (DP) after calcination, d Cu/SiO2 (DP) after reduction.
Published Version
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