RETRACTED: Microwave hydrodistillation for extraction of essential oil from Pogostemon cablin Benth: Analysis and modelling of extraction kinetics

Abstract

Abstract In this study the extraction of essential oil from Pogostemon cablin Benth done by using microwave hydrodistillation. In the patchouli oil extraction with microwave hydrodistillation method is studied the effect of the size of the material (intact and chopped leaves) and the effect of the ratio of raw material to be extracted with a solvent to the yield of patchouli oil. Besides it also studied the effect of microwave power to the yield of patchouli oil and kinetics during the extraction process. Then, a microwave hydrodistillation model based on the assumption of a second-order mechanism was developed to predict the rate constant of extraction, the saturated extraction capacity and the initial extraction rate with various temperatures in two microwave powers, 400 and 600 W. Furthermore, the activation energies were determined as based on the second-order rate constants of extraction used for the model building. The values resulting from these calculations and experiments were compared and discussed.