Abstract
The equilibrium constants for the liquid-phase dehydration reaction between 1-octanol and ethanol to 1-ethoxyoctane (EOE) and water and the dehydration reaction between two ethanol molecules to ethoxyethane (DEE) and water were determined over Amberlyst 70 in the temperature range (410 to 463) K in a batch reactor. Both reactions were greatly shifted to products at the chemical equilibrium. In particular, product concentrations found for EOE synthesis were higher than those measured for DEE formation. Besides, both liquid-phase etherification reactions proved to be exothermic, with a reaction enthalpy change of (−18.9 ± 1.3) kJ·mol–1 for EOE synthesis and (−13.1 ± 0.9) kJ·mol–1 for DEE one, at 298 K. The EOE standard formation enthalpy value of (−436 ± 7) kJ·mol–1, in good agreement with the estimated value by a modified Benson method, and the EOE standard molar entropy value in the liquid phase of (434 ± 11) J·mol–1·K–1, slightly underestimated by the Benson method, are found.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call