Kinetic modelling of esterification of glycerol with acetic acid catalyzed by lewatite

1st International Symposium of Indonesian Chemical Engineering 2018

Setyaningsih, L.^1 ; Mutiara, T.^1 ; Chafidz, A.^1 ; Zulkania, A.^1 ; Andrianto, M.A.^1 ; Farikha, N.L.^1

Department of Chemical Engineering, Islamic University of Indonesia, Yogyakarta, Indonesia^1

关键词: Atmosphere pressure;    Effect of temperature;    Esterification reactions;    Glycerol esterifications;    High thermal stability;    Kinetic modelling;    Model performance;    Pseudo-homogeneous modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/543/1/012008/pdf
DOI  :  10.1088/1757-899X/543/1/012008

来源: IOP

【 摘 要 】

One of the ester product of glycerol and acetic acid is triacetin which has wide industrial aplication. In this study the esterification of glycerol with acetic acid over Lewatite catalyst to produce triacetin, were carried out. Lewatite is one of ion exchange resin, the use of ion exchange resins as catalyst will not produce waste, not corrosive, high thermal stability and has good selectivity. The esterification reaction of glycerol with acetic acid were performed in a three-neck flask with stirrer (175 rpm) at temperature (90 °C, 100 °C and 110 °C) and atmosphere pressure. A 9.66 % selectivity of triacetin with conversion (77.4 %) was achieved at 100 °C within 90 minutes of reaction time. This research aimed to report experimental data and kinetic modeling of glycerol esterification with acetic acid to evaluate and compare model performance and capability. A kinetic model was developed using a first order pseudo-homogeneous model according to the experimental data. The surface reaction of acetic acid with glycerol was assumed to be rate-controlling. The effect of temperature to rate of reaction constants can be expressed as follows: