油脂氢化的动力学模型

给出了油脂氢化反应中活化态氢与甘三酯分子反应的动力学模型。H_2吸附在催化剂上形成活化态氢。它分别与甘三酯中的三烯酸(酯)、二烯酸(酯)、单烯酸(酯)发生反应。采取类似Ridel-Langmuir的方法, 导出了油酯氢化动力学方程式。对该公式进行了验证, 理论值与实验值相当一致。本文公式可概括半经验的Albright公式、Allen公式和Moharir公式。

A KINETIC MODEL OF THE HYDROGENATION OF OIL AND FAT

A kinetic model of fat and oil hydrogenation is given in this paper. Hydrogenis adsorbed at the surface of catalyst M forming activated H.It reacts with linolenate,Linoleate and oleat respectively. Adopting Ridel-Langmuir's method, we establishedthe kinetic equation. (4)--(11) Using refined soybean oil, pure hydrogen, self-made catalyst, we carried out aseries of hydrogenation experiments in a high pressure reactor (FDW-01), the fattyacid chromatographer (GC-9A). From the results, straght lines were obtained thusthe model has been proved. The pseudofirst order reaction rate constant (k_i N_H)and fatty acid composition of the original oil can be obtained from the figures. Allcalculated results are coincident with the experimental data The allen's empirical formula can be obtained from the present kinetic equations.if k_1 was replaced by Arrhenius formula and N_H replaced by eqs.8.If linolenate=0,the present equation will change into the Moharir's formula. If N_H=1, Eqs. (9)-(11)will change into semiempirical formula of Albright.