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Sonohydrodistillation: Innovative approach for isolation of essential oil from the bark of cinnamon

Piyush I. Modi, Jigisha K. Parikh, Meghal A. Desai
Industrial crops and products 2019 v.142 pp. 111838
Cinnamomum verum, bark, carbon dioxide, cinnamon, cinnamon oil, energy, experimental design, greenhouse gas emissions, heat, hydrodistillation, mechanism of action, particle size, sonication, ultrasonics
Ultrasound was incorporated with hydrodistillation to enhance the efficiency for extracting essential oil from the bark of Cinnamon (Cinnamomum zeylanicum L.) and compared with hydrodistillation. Critical parameters such as solid loading, average particle size, extraction time, amplitude, heating mantle power, and pulse ratio were assessed to observe their impact on the yield of essential oil and cinamaldehyde. Using Box-Behnken design, yield of cinnamon oil was found to be 4.64% (w/w) and fraction of cinamaldehyde was 0.94 at 25 g solid loading, 1000 μm average particle size, 20 min extraction time, 60% amplitude, 500 W heating power, and 27:33 pulse ratio. The mechanism of action of ultrasound and thermal heating on plant materials was explained with the help of micrographs. It was possible to reduce energy consumption and CO2 emission using sonohydrodistillation when compared with hydrodistillation. Hence, it was possible to achieve process improvement by combining sonication with hydrodistillation.