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为探寻可替代传统粮食发酵法制乙醇的新工艺,本文选用管式等温积分反应器,在180~230℃、1.0~5.0MPa、乙酸乙酯的质量液时空速(LHSV)0.7~1.9 g/(g·h)和氢酯比(以物质的量计)20~50的条件下,对某CuZn/Al2O3催化剂上乙酸乙酯加氢制乙醇的本征动力学特性进行了实验研究。以四阶五级龙格-库塔-费尔贝格(Runge-Kutta-Felhberg)法为数值积分方法,以列文伯格-马夸特(Levenberg-Marquardt)法为最优化算法,对动力学实验数据进行非线性拟合,建立了乙酸乙酯催化加氢制乙醇的幂律型本征动力学模型。数理统计和残差分布检验结果表明,模型计算值与实验测定值良好相容,能够恰当地描述此反应的本征动力学特性。
In order to explore a new technology that can replace the traditional ethanol fermentation of foodstuffs, this paper selected a tubular isothermal integration reactor at 180 ~ 230 ℃, 1.0 ~ 5.0MPa, mass hourly space velocity of ethyl acetate (LHSV) 0.7 ~ 1.9g / ( g · h) and hydrogenate ratio (in terms of the amount of substance) 20 ~ 50 under the conditions of a CuZn / Al2O3 catalyst ethyl acetate hydrogenation of ethanol kinetic characteristics of the experimental study. Taking the fourth-order Runge-Kutta-Felhberg method as numerical integration method and the Levenberg-Marquardt method as the optimization algorithm, According to the experimental data, the power law intrinsic kinetic model of ethyl alcohol catalyzed hydrogenation to ethanol was established. The results of mathematical statistics and residual distribution test show that the calculated values of the model are in good agreement with the experimental values and the intrinsic kinetic properties of the reaction can be properly described.