VLE and LLE for the binary system of 1,3-dichloro-2-propanol and water

• Main Authors: Tseng,Yu Min, 曾郁閔
• Other Authors: Jang,Shi Shang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/00185972362854307291

碩士 === 國立清華大學 === 化學工程學系 === 104 === Recently, the strong growth of biodiesel production has determined the availability of a great amount of the byproduct glycerol, resulting in a direct process to prepare 1,3-DCH consisting of the chlorination of glycerol with hydrochloric acid was developed. Most of the thermodynamic parameters of this process could not be obtained from the literature. Therefore, this study embarked on the thermodynamic equilibrium experiments in order to increase the applicability of the process simulations. The process of the glycerol chlorination existed in the binary azeotrope of 1,3-DCH and water, which would affect the accuracy of the design process. Therefore, it needed more accurate thermodynamic data to design the process completely. In this work, the vapor-liquid equilibrium and liquid-liquid equilibrium data for the binary system of 1,3-DCH and water were conducted in a modified Othmer type equilibrium still at atmospheric pressure. The experimental results exhibited azeotropic behavior and positive deviations from Raoult’s law. The thermodynamic consistency of the new binary VLE data had been confirmed by the area tests. The measured VLE and LLE data were regressed by the activity coefficient model of NRTL. Our regressed results showed that the correlation by the NRTL model was in good agreement with the experimental data for VLE. And for LLE, the deviation existed in experimental data of organic phase