Evaporation of the fragrance component, cinnamyl alcohol, using simultaneous TG–DTA

The thermal behavior of cinnamyl alcohol, which is used in the perfume industry to create a sweet, balsamic and hyacinth-like fragrance, was examined with a simultaneous thermogravimetric–differential thermal analysis (TG–DTA) unit. The sample was subjected to a controlled rising temperature regime under a regulated purge gas flow rate. The evaporation rates and coefficient of evaporation were calculated from TG–DTG data. From the DTG curve, it was found that the evaporation of cinnamyl alcohol is a zero-order process. The activation energy and enthalpy of vaporization for the evaporation process were determined by the use of the Arrhenius and Clausius–Clapeyron equations, respectively. The enthalpy value was calculated to be 68.10±0.84 kJ, while the energy of activation was found to be 66.34±0.84 kJ. The Langmuir equation was applied to the evaporation data, enabling the vapor pressure curves to be determined.