摘要
旨在为生物柴油后处理阶段的超临界CO_(2)提纯工艺提供参考数据,以生物柴油生产过程中后处理阶段体系所含的油酸、无水乙醇及甘油为原料,通过在SYLG-01型超临界流体相平衡实验装置中,观察油酸-甘油-无水乙醇共混体系在温度为308 K下与CO_(2)达到相平衡状态的过程。结果表明,油酸-甘油-无水乙醇共混体系为液-液两相,与CO_(2)在相平衡实验装置内最开始是气-液-液态,随着压力的增加,当CO_(2)达到超临界状态时,不同相之间的流动性和传递性增强,共混体系变成了均一态。因此,改变超临界CO_(2)的压力,有望将体系中的游离脂肪酸和副产物甘油同时萃取分离。
Aiming to provide reference for the supercritical CO_(2)purification process in the post-treatment stage of biodiesel production,oleic acid,anhydrous ethanol,and glycerol contained in the system in the post-treatment stage of biodiesel production were used as raw materials,and the process of oleic acid-glycerol-anhydrous ethanol co-blended system reaching phase equilibrium in CO_(2)at a temperature of 308 K was observed in the SYLG-01 supercritical fluid phase equilibrium experimental device.The results showed that the oleic acid-glycerol-anhydrous ethanol co-blended system was a liquid-liquid phase,and it was gas-liquid-liquid state at the beginning with CO_(2)in the phase equilibrium experimental device,and as the pressure increasing,when CO_(2)reached the supercritical state,the mobility and transferability between different phases were enhanced and the co-blended system became homogeneous.Therefore,changing the pressure of supercritical CO_(2)could extract and separate the free fatty acids and by-products glycerol in the system at the same time.
作者
笪雄志
郝小红
张旗
杜肃
张森
DA Xiongzhi;HAO Xiaohong;ZHANG Qi;DU Su;ZHANG Sen(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《中国油脂》
CAS
CSCD
北大核心
2023年第5期116-119,共4页
China Oils and Fats
关键词
超临界流体
油酸
甘油
相平衡状态
supercritical fluid
oleic acid
glycerol
phase equilibrium state
作者简介
笪雄志(1999),男,硕士研究生,研究方向为动力工程(E-mail)1914489893@qq.com;通信作者:郝小红,副教授(E-mail)haoxh@usst.edu.cn。
