Abstract
A series of Cu–Zn–Ce catalysts were prepared by coprecipitation method and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, temperature programmed reduction, and N2 adsorption. The catalytic activities of the Cu–Zn–Ce catalysts in gas phase hydrogenation of maleic anhydride in the presence of n-butanol were studied at 220–280 °C and 1 MPa. The conversion of maleic anhydride was more than 97%. After reduction, CuO species present in the calcined Cu–Zn–Ce catalysts were converted to metallic copper (Cu°). The presence of ZnO in the Cu–Zn–Ce catalysts was beneficial to stabilizing the catalytic activity in maleic anhydride hydrogenation to γ-butyrolactone. At the same time, n-butanol was dehydrogenated to butyl aldehyde, then to butyl butyrate via reactions, such as disproportionation and esterification. Cu–Zn–Ce catalysts are beneficial to the H2 compensation in the coupling process of hydrogenation and dehydrogenation.
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Acknowledgments
The work was financially supported by Jiangsu Province, China (200470) and Zhenjiang Science and Technology Bureau (CZ2006006). Authors sincerely thank Professor Jianxin Wu at University of Science and Technology, China, for XPS measurement and Professor Kangmin Chen at Jiangsu University for XRD measurement.
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Zhang, D., Yin, H., Zhang, R. et al. Gas Phase Hydrogenation of Maleic Anhydride to γ-Butyrolactone by Cu–Zn–Ce Catalyst in the Presence of n-Butanol. Catal Lett 122, 176–182 (2008). https://doi.org/10.1007/s10562-007-9366-4
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DOI: https://doi.org/10.1007/s10562-007-9366-4