| Summary: | 碩士 === 中國文化大學 === 化學工程與材料工程學系奈米材料碩士班 === 105 === In this study, we used the supercritical carbon dioxide fluid to extract essential oil from the Antrodia cinnamomea, and study the effects of pressure, temperature and flow rate on the yield of essential oil. In the experimental planning, we have introduced the central composite design (CCD) for fitting the second-order response surface model. Because CCD takes the axial points into account, this results five levels in each experimental factor. This design include 8 corner points, 6 axial points, and repeat 6 central points, so total has 20 cases. In the experiment the pressure condition is 2000 psi, 2405 psi, 3000 psi, 3595 psi and 4000 psi, the temperature condition is 35 °C, 39 °C, 45 °C, 51 °C and 55 °C, and the flow rate condition is 90 L/hr, 108 L/hr, 135 L/hr, 162 L/hr and 180 L/hr. To study the significance of the interaction among each factor and find out the best extraction condition, we calculated the yield of each case by using the weight percentage formula, analyzed the results by using the second order model, and drew the data, which from the second order model, into the reaction surface chart and contour chart by using MATLAB software. Later we checked whether the results from supercritical carbon dioxide fluid extraction is as same as the results from the soxhlet extraction, and used the Portable FT-IR to check whether the composition of essential oil from these two extractions is the same.
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