Enhanced hydrogenation of dimethyl oxalate to ethylene glycol over indium promoted Cu/SiO2
2019
Yu, Xinbin | Vest, Trey A. | Gleason-Boure, Nicolas | Karakalos, Stavros G. | Tate, Gregory L. | Burkholder, Michael | Monnier, John R. | Williams, Christopher T.
Hydrogenation of dimethyl oxalate (DMO) on Cu/SiO₂ catalysts is the final reaction step in a growing industrial syngas to ethylene glycol (StEG) process. In the present work, indium species are found to dramatically enhance the performance of a Cu/SiO₂ catalyst prepared by urea-assisted gelation for the conversion of DMO to EG. Characterization reveals that indium species have negligible effect on the content of Cu⁺ species on the surface. Rather, the promotional effect likely originates from interactions between reduced indium species and Cu⁰ species though enhanced ability of the latter to activate H₂.
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