Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 38, Pages 17746-17759Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b03725
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Funding
- FEDER funds through COMPETE2020-Programa Operational Competitividade e Internacionalizack (POCI) [PTDC/QE-Q: ERQ/2698/2014 POCI-01-0145-FEDER-016866]
- FCT-Fundacao para a Ciencia e a Tecnologia
- NORTE2020 through PT2020 [NORTE-01-0145-FEDER-000006]
- NORTE2020 through ERDF [NORTE-01-0145-FEDER-000006]
- Associate Laboratory - FCT/MCTES (PIDDAC) [LSRE-LCM-UID/EQU/50020/2019]
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In this work, the main results of a thermodynamic and kinetic study of glycerol ketalization to produce solketal in the presence of a solvent are presented. A catalyst and a solvent screening was carried out leading to the selection of Amberlyst-35 ion-exchange resin and ethanol as the most suitable materials for this reaction. A parametric study allowed one to determine reaction equilibrium and kinetic parameters in a batch reactor in the absence of external mass-transfer limitations. Regarding reaction thermodynamic equilibrium, a standard enthalpy of -20.1 +/- 1.1 kJ mol(-1) and a Gibbs free energy of 1.4 +/- 0.3 kJ mol(-1) were obtained. Reaction kinetics was studied assuming different reaction rate laws to fit the experimental data obtained: Pseudo-Homogeneous (PH), Langmuir-Hinshelwood-Hougen-Watson (LHHW), and Eley-Rideal (ER). The experimental results revealed that the reaction kinetics behavior could be accurately described by the LHHW reaction rate law, considering the presence of internal mass-transfer resistances. The activation energy for the overall reaction was found to be 69.0 +/- 6.6 kJ mol(-1).
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