Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 56, Issue 2, Pages 479-488Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.6b03581
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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 degrees 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.
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