Megawati, FT Teknik Kimia (2019) Kinetics of mace (Myristicae arillus) essential oil extraction using microwave assisted hydrodistillation: Effect of microwave power. Industrial Crops & Products, 131. pp. 315-322. ISSN 0926-6690

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Abstract

Mace essential oil extractions were carried out using hydrodistillation (HD) and microwave assisted hydro- distillation (MAHD). The powers used were varied from 300, 600, and 800 W. The amounts of oil from dew resulted from condensation were measured every 1 min. The condensation was done using 12 °C cold water. From the experimental results, MAHD is seen to be superior to HD. The extraction using MAHD at 800 W stopped after 20 min (8.63% yield), while the one using HD stopped after 73 min (7.03% yield). The power used affected the yields of essential oils obtained. From the various powers used, in 10 min, the yields obtained were 2.68, 4.56, 5.41%, in 15 min 4.12, 6.20, 6.83%, and in 20 min 5.13, 7.39, 6.83% at 300, 600, and 800 W, respectively. It can also be seen that time has a significant effect on the essential oil yields obtained. The main components of the essential oil obtained from HD and MAHD were beta pinene, alpha pinene, myristicin, 4-terpineol, and gamma terpinene. The mechanism of mace essential oil mass transfer using HD and MAHD methods was con- trolled by intra-particle diffusion following the Fick’s law. The diffusion coefficient (De) of HD was 4.98 × 10−14 m2 /s and the diffusion coefficients of MAHD were 9.17 × 10−14, 1.39 × 10−13, and 1.65 × 10−13 m2 /s at 300, 600, and 800 W, respectively. The empirical correlation of diffusion coefficient and MAHD power can be approximated by De = 3.02 × 10−15 × P0.5985.

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