期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 47, 期 5, 页码 1453-1463出版社
AMER CHEMICAL SOC
DOI: 10.1021/ie071220p
关键词
-
The heterogeneous catalysis of lactic acid (88 wt %) esterification with ethanol in the presence of Amberlyst 15-wet was studied for catalyst loading of 1.2-3.9 wt %, initial molar ratio of reactants of 1.1-2.8, and temperature from 50 to 90 degrees C. In this work a methodology based on the UNIQUAC model was developed to determine the thermodynamic equilibrium constant since in the literature there is inconsistency concerning the temperature dependence of the thermodynamic equilibrium constant. A simplified Langmuir-Hinshelwood kinetic model was used to predict the experimental data. The proposed rate law is r = k(c)(aE(th)a(La) - a(EL)a(w)/K)/(1 + K(Eth)a(Eth) + K(w)a(w))(2); the kinetic parameters are the preexponential factor, k(c,0) = 2.70 x 10(7) mol.g(-1).min(-1), and the activation energy, E-a = 49.98 kJ/mol. The equilibrium reaction constant is K = 19.35 exp(-515.13/T (K)) with reaction enthalpy 4.28 kJ/mol. The model reasonably predicts the kinetic experimental data, and it will be very useful to apply to the design and optimization of industrial hybrid reactive separation processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据