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首页> 外文期刊>Journal of industrial and engineering chemistry >Selective hydrogenation of maleic anhydride to 7-butyrolactone and tetrahydrofuran by Cu-Zn-Zr catalyst in the presence of ethanol
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Selective hydrogenation of maleic anhydride to 7-butyrolactone and tetrahydrofuran by Cu-Zn-Zr catalyst in the presence of ethanol

机译：Cu-Zn-Zr催化剂在乙醇存在下将马来酸酐选择性加氢成7-丁内酯和四氢呋喃

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摘要

A series of Cu-Zn-Zr catalysts were prepared by a coprecipitation method and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, temperature programmed reduction, and N2 adsorption. The catalytic activity of the Cu-Zn-Zr catalyst in the hydrogenation of maleic anhydride using ethanol as a solvent was studied at 220-280 °C and 1 MPa. Maleic anhydride was mainly hydrogenated to 7-butyrolactone and tetrahydrofuran while ethanol dehydrogenated to ethyl acetate. After reduction, CuO species present in the calcined Cu-Zn-Zr catalysts were converted to metallic copper (Cu°). The presence of ZrO2 favored the deep hydrogenation of 7-butyrolactone to tetrahydrofuran while the presence of ZnO was beneficial to the formation of the intermediate product 7-butyrolactone. The molar ratios of the hydrogen produced in ethanol dehydrogenation to the hydrogen consumed in maleic anhydride hydrogenation increased with the increase of the reaction temperature.
机译：通过共沉淀法制备了一系列的Cu-Zn-Zr催化剂，并通过X射线衍射，X射线光电子能谱，程序升温还原和N2吸附进行了表征。研究了Cu-Zn-Zr催化剂在220-280℃和1 MPa条件下，以乙醇为溶剂对马来酸酐加氢反应的催化活性。马来酸酐主要被氢化为7-丁内酯和四氢呋喃，同时乙醇被脱氢为乙酸乙酯。还原后，煅烧后的Cu-Zn-Zr催化剂中存在的CuO物种转化为金属铜（Cu°）。 ZrO2的存在有利于7-丁内酯深度氢化为四氢呋喃，而ZnO的存在有利于中间产物7-丁内酯的形成。乙醇脱氢中产生的氢与马来酸酐加氢中消耗的氢的摩尔比随着反应温度的升高而增加。

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