Research Progress in Separation Organics from Aqueous Solution by Pervaporation
LI Xing1,2, DENG Lisheng1,2, HE Zhaohong1,2, HUANG Hongyu1,2
1.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640 2.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640
Abstract: Pervaporation is a novel selective membrane separation technology used for liquid mixture separation. It has the advantages of high efficiency, economy, safety and cleanliness, and it is suitable for the separation of a similar boiling point mixture which is difficult to be separated by distillation. This technology is mainly applied to the removal of trace water from organic solvents and the separation of small amounts of organic compounds from aqueous solutions at present. However, the researches on the removal of trace water from organic solvents by pervaporation is the most developed, most mature and the first to be used in industry, but the studies on the separation of small amounts of organic compounds from aqueous solutions by pervaporation are few, not mature enough, and the application in industry is still in the preliminary stage, which is an important development direction in the future. Compared to the separation of water from organic solvents by pervaporation, the separation of organic compounds from aqueous solutions by pervaporation needs to be treated more complex, the requirements on the selectivity and adaptability of pervaporation membranes are higher. So the study of the separation of organic compounds from aqueous solutions by pervaporation including the preparation of different pervaporation membrane to separate different organic compounds in water, and changing the technological conditions of pervaporation process and the membrane preparation conditions. Thus, the effects of various factors on the properties of pervaporation in the process of pervaporation were studied, thus the separation of organic compounds from water by pervaporation are optimized. There are many factors influencing the separation of organic compounds from water by pervaporation, including two aspects: technological conditions and membrane conditions. In terms of technological conditions, the effects of concentration of organic compound, temperature and per-meation pressure on pervaporation performance were investigated, because this factors were easy to control and adjust in pervaporation process, and the effect was obvious. The study found that when a single organic compound was separated from water, with the increased of the concentration of organic compound, the permeation flux of organic compound would increase, but the separation factor of organic compound might increase or decrease. With the increased of temperature, the permeation flux of organic compound would increase, but the separation factor of organic compound might increase or decrease. With the increased of permeation pressure, the performance of the pervaporation would be improved. In terms of membrane conditions, the main researches were to prepare some new priority permeable organic membranes, or modify the existing priority permeable organic membranes, thus to separate the different organic compounds from the water. The affinity and selectivity of the membrane to organic compound were improved, by optimizing the preparation conditions, structure and properties of the membrane, and the pervaporation performances were improved. In this paper, the characteristics, the principle and the related research progress in separation organics from aqueous solution by pervaporation were introduced, and the effects of different pervaporation membranes and technological conditions on the pervaporation properties of separation organics from aqueous solution were reviewed, and some experimental results on the separation of organic compounds from water by pervaporation were summarized, and the application prospect of separation organics from aqueous solution by pervaporation was prospected.
李兴,邓立生,何兆红,黄宏宇. 渗透汽化分离水中有机物的研究进展[J]. 材料导报, 2019, 33(15): 2610-2616.
LI Xing, DENG Lisheng, HE Zhaohong, HUANG Hongyu. Research Progress in Separation Organics from Aqueous Solution by Pervaporation. Materials Reports, 2019, 33(15): 2610-2616.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2019, Vol. 33 
