Reaction Kinetic Study of Solketal Production from Glycerol Ketalization with Acetone
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- 作者：Vinicius RossaYolanda da S. P. Pessanha ; Gisel Ch. Díaz ; Leôncio Diógenes Tavares Câmara ; Sibele B. C. Pergher ; Donato A. G. Aranda
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2017
- 出版时间：January 18, 2017
- 年：2017
- 卷：56
- 期：2
- 页码：479-488
- 全文大小：497K
- ISSN：1520-5045
文摘
The best conditions for the kinetic study of the ketalization reaction of glycerol with acetone for the production of solketal using zeolite H-BEA (SAR 19) as a catalyst were found through a fractional experimental design. To simplify the heterogeneous kinetics, by means of a smaller number of kinetic parameters to encompass all the kinetic terms toward the products and reagents, a reversible kinetic model was used. From the comparison between the experimental and calculated conversions, it was possible to analyze the accuracy of the estimations, providing a good way to apply statistical treatments to improve the calculated kinetic properties. Thereby, it is possible to calculate the equilibrium constants for a range of reactions performed across different temperatures (40–80 °C) as well as the forward reaction activation energy (44.77 kJ mol–1) and the reverse reaction activation energy (41.40 kJ mol–1). Moreover, 70–76% glycerol conversion was obtained using the same catalyst for five reactions, without wash or performing any other pretreatments in the catalyst between reactions. The solketal product has been studied as a green industrial solvent additive in gasoline and biofuels.