| Summary: | 碩士 === 明志科技大學 === 化學工程系碩士班 === 105 === The heterogeneous kinetic behavior for the synthesis of amyl acetate from acetic acid with pentanol over acidic cation-exchange resin, (Amberlyst39) was investigated by using a batch reactor. The kinetic experiments were performed at temperatures between 313.2 K and 348.2 K, and molar ratio of pentanol to acid in the feed stream from 1 to 10. Additionally, the mass transfer resistances on the catalytic reaction, and the different levels of catalyst loadings were also observed.
The reaction rate of acid increased with increase of reaction temperature, molar ratio of pentanol to acid in the feed stream, catalyst loading, and rotational speed. Moreover, the equilibrium conversion of acid increased with increase of reaction temperature and molar ratio of pentanol to acid in the feed stream. The relative adsorption strengths of the reacting species were determined by adsorption experiment. The results indicated that the magnitude of adsorption strengths of Amberlyst 39 followed the order of water > pentanol > acetic acid > amyl acetate.
The kinetic data of the synthesis of amyl acetate were correlated with the ideal-quasi-homogeneous (IQH), the non-ideal-quasi-homogeneous (NIQH) ,the Eley-Rideal(ER)and the Langmuir-Hinshelwood-Hougen-Watson (LHHW) models, respectively. The optimal values of the kinetic parameters were determined from the data fitting. The NRTL model was used to calculate the activity coefficients for each reacting species. The LHHW model, which consider the effect of adsorption was the best representation for the kinetic behavior of heterogeneous catalytic synthesis of amyl acetate.
Keyword: Amberlyst 39, amyl acetate, heterogeneous, kinetic models
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