中文摘要：

采用Cu-ZnO/Al2O3催化剂,在高压搅拌釜中进行了醋酸乙酯加氢制乙醇气液固三相反应过程的研究,考察了溶剂效应、内外扩散和反应条件对醋酸乙酯转化率和乙醇选择性的影响。实验结果表明,醋酸乙酯在四乙二醇二甲醚溶剂中的转化率要高于在液体石蜡介质中的转化率。以四乙二醇二甲醚为溶剂,当催化剂粒径小于120μm,搅拌转速大于800r/min时,反应的内外扩散阻力可忽略;在最佳的反应条件（温度250℃,压力5.0MPa,醋酸乙酯液时空速1.0h^-1,氢气与醋酸乙酯的物质的量之比（氢酯比）10∶1,搅拌转速800r/min）下,醋酸乙酯的转化率为83.5%,乙醇的选择性为96.5%。在醋酸乙酯加氢制乙醇反应中引入液相介质,能够较好地解决气固相反应中催化剂床层的移热问题,且能有效降低反应的氢酯比。

英文摘要：

The gas-liquid-solid three-phase catalytic hydrogenation of ethyl acetate（EA） to ethanol was studied in a magnetically stirred autoclave with Cu-ZnO/Al2O3 as the catalyst. The effects of solvent, internal and external diffusion, and reaction conditions on the conversion of ethyl acetate and the selectivity to ethanol were investigated. The experimental results indicate that the conversion of ethyl acetate was higher in the solvent of tetraglyme than that in liquid paraffin. The internal and external diffusion resistance of the reaction could be ignored when the catalyst particle size was smaller than 120 μm and the stirring rate was higher than 800 r/rain in the solvent of tetraglyme. Under the optimal reaction conditions of 250 ℃,5.0 MPa,stirring rate of 800 r/min,LHSV of 1.0 h 1 and mole ratio of H2 to EA 10 ： 1,the conversion of ethyl acetate was 83.5 % and the selectivity to ethanol was 96.5 %. The introduction of the liquid medium to the hydrogenation of ethyl acetate to ethanol could solve the catalyst bed heat-removing problem of the gas-solid phase process and effectively reduce the mole ratio of H2 to EA.