Kinetics Study on Synthesis of Ethyl Acrylate via Heterogeneous Catalytic Reaction

• Main Authors: Che-Wei Lin, 林哲緯
• Other Authors: Ho-mu Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/43z8dh

碩士 === 國立臺灣科技大學 === 化學工程系 === 94 === The heterogeneous kinetics and adsorption behavior for synthesis of ethyl acrylate were investigated with a packed-bed reactor over an acidic cation-exchange resin, Amberlyst 35. The esterification was performed at temperatures from 318.15 K to 348.15 K. In addition to temperature, the effects of molar ratios of alcohol to acid in the feed stream (θB0) and the mass transfer resistance were also studied. The equilibrium conversion of acrylic acid was found to increase with increasing both temperature and the composition of feedθB0. The relative adsorption strengths for the reacting species were determined by adsorption experiments. The results indicated that the magnitude of adsorption strengths followed the order of water > acrylic acid > ethanol > ethyl acrylate. The kinetic data were correlated with the ideal-quasi-homogeneous, the non- ideal-quasi-homogeneous, the Langmuir-Hinshelwood-Hougen-Waston (LHHW), the Eley-Rideal (ER) models, the modified LHHW (M-LHHW) and the modified ER (M-ER). The optimal values of the kinetic parameters were thus determined from the data fitting. The M-LHHW model yielded the best representation for the kinetic behavior of heterogeneous catalytic synthesis of ethyl acrylate.