物理化学学报 >> 1992, Vol. 8 >> Issue (06): 789-794.doi: 10.3866/PKU.WHXB19920614

研究论文 上一篇    下一篇

油脂氢化的动力学模型

艾宏韬; 黄道惠; 张玉军; 王水兴   

  1. 郑州粮食学院油脂精细化工研究室,郑州 450052
  • 收稿日期:1990-10-16 修回日期:1992-05-25 发布日期:1992-12-15
  • 通讯作者: 艾宏韬

A Kinetic Model of the Hydrogenation of Oil and Fat

Ai Hong-Tao; Huang Dao-Hui; Zhang Yu-Jun; Wang Shui-Xing   

  1. Fat and Oil Laboratory of Fine chemical Engineering Zhengzhou Grain College, Zhengzhou 450052
  • Received:1990-10-16 Revised:1992-05-25 Published:1992-12-15
  • Contact: Ai Hong-Tao

摘要: 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。

关键词: 油脂氢化, 活化态氢, 动力学方程式

Abstract: A kinetic model of fat and oil hydrogenation is given in this paper. Hydrogen is adsorbed at the surface of catalyst M forming activated H.It reacts with linolenate, Linoleate and oleat respectively. Adopting Ridel-Langmuir's method, we established the kinetic equation.(4)—(11)
Using refined soybean oil, pure hydrogen, self-made catalyst, we carried out a series of hydrogenation experiments in a high pressure reactor (FDW-01), the fatty acid chromatographer (GC-9A). From the results, straght lines were obtained thus the model has been proved. The pseudofirst order reaction rate constant (k_iN_H) and fatty acid composition of the original oil can be obtained from the figures. All calculated results are coincident with the experimental data.
The allen's empirical formula can be obtained from the present kinetic equations. if k_i 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.

Key words: Fat and oil hydrogenation, Activated H, Kinetic equation