Study on performance of Ag-modified layered copper silicate catalyst for hydrogenation of dimethyl oxalate to methyl glycolate
Methyl glycolate (MG) is a high value-added chemical intermediate and widely used in the fields of medicine, chemical industry, fodder and dyes. A series of CuAg/SiO2 catalysts were prepared by sol-gel method for hydrogenation of dimethyl oxalate to MG. The structure of catalysts was characterized b...
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Published in | Journal of fuel chemistry and technology Vol. 50; no. 8; pp. 1014 - 1022 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2022
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Subjects | |
Online Access | Get full text |
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Summary: | Methyl glycolate (MG) is a high value-added chemical intermediate and widely used in the fields of medicine, chemical industry, fodder and dyes. A series of CuAg/SiO2 catalysts were prepared by sol-gel method for hydrogenation of dimethyl oxalate to MG. The structure of catalysts was characterized by XRD, N2-physical adsorption, FT-IR, TEM, H2-TPR, and XPS, and the influence of Ag loading on catalytic performance was investigated. The 5Ag-Cu/SiO2 catalyst with Ag loading of 5% exhibited the best catalytic performance with DMO conversion of 83.7% and MG selectivity of 72.2%. The characterization results showed that introducing appropriate amount of Ag not only improved the dispersion of copper species, but also increased the content of Cu+, thereby improving the catalytic activity of CuAg/SiO2 catalysts. In addition, the electron transfer between Ag and Cu could effectively stabilize Cu+, and eventually improved the stability of the catalyst. |
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ISSN: | 1872-5813 1872-5813 |
DOI: | 10.1016/S1872-5813(21)60011-2 |