Research article
Vol 2 No 1 (2008): Volume 2, Number 1, 2008
Studi kinerja katalisator lewatit monoplus s-100 pada reaksi esterifikasi antara etanol dan asam asetat
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sultan Ageng Tirtayasa Jl. Jendral Sudirman KM.3 Cilegon, Banten
Abstract
Sulfuric acid is common catalyst in producing ethyl acetate. Despite of high conversion, using sulfuric acid as catalyst is appearing a lot of problems. The use of solid catalyst is expected to solve the problem. Utilizing of lewatit monoplus s-100 in the esterification of ethanol and acetic acid was investigated in this work. The experiments were carried out in a reactor on the hot plate equipped with magnetic stirrer. The reactant ratio was 1.2 gmol acetic acid / gmol ethanol and lewatit monoplus s-100 as catalyst. Samples were taken at initial and after 60 minutes, then the samples were analyzed by using gas chromatograph. The same experiments were conducted at different temperatures and catalyst concentrations. Based on the experimental result, lewatit monoplus s-100 performed well as solid catalyst in the esterification. It was shown that the higher the temperature, the higher the reaction rate, meanwhile increasing the catalyst concentration, the conversion was lower. The highest conversion was 87.3%, when the temperature was 358 K, and a catalyst concentration was 0.8 g. resin /g. ethanol.
References
Choi, J. I., Hong, W. H., and Cham, H.N., 1996. ”Reaction kinetics of Lactic Acid with Methanol Catalyzed by Acid Resins”, Int. J. Chem. Kinet. 28, 37-41.
Fogler, S.H., 2006. ”Elements Of Chemical Reaction Engineering,” 4th Edition Prentice Hall International Series in the Physical and Chemical Engineering Sciences.
Kirbaslar, S.I., Baykal, Z.B., and Dramur, U., 2001. ”Esterification of Acetic Acid with Ethanol Catalysed by an Acidic Ion-Exchange Resin,” Turk. J. Environ. Sci. 25, 569-577.
Kolah, A.K., Astana , N. S., Vu, D. T, Lira, C.T., and Miller, D.J., 2007. ”Reaction Kinetics of the Catalytic Esterification of Citric Acid with Ethanol”, Ind. Eng. Chem. Res. 46, 3180- 3187.
Marchetti J.M. and Errazu A.F., 2008. ”Esterification of free fatty acid using sulfuric acid as catalyst in the presence of triglycerides”, Biomass and Energy 32, 892-895.
Nemec, D., and Van Gemert, R., 2005. ”Performing Esterification Reaction by Combining Heterogeneous Catalysis and Pervaporation in a Batch
Process”, Ind. Chem. Res. 44, 9718-9726.
Popken, T., Gotze, L., and Gmehling, J., 2000. ”Reaction Kinetics and Chemical Equilibrium of hamogeneously and Heterogeneously catalyzed a
Acetic Acid Esterification with Methanol and Methyl Acetate Hydrolysis”, Ind. Chem. Res. 39, 2601-2611.
Smith, J.M., 1981. ”Chemical Engineering Kinetics”, McGraw Hill International Book Co., Singapore.
www.wikipedia.org/etil_asetat, diunduh tanggal 29 November 2008.