Thermopervaporation with a Porous Condenser for Triethylene Glycol Dehydration

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2022-08-14 DOI:10.1134/S2517751622040047

G. S. Golubev, A. V. Balynin, I. L. Borisov, A. V. Volkov

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Abstract

For the task of triethylene glycol (TEG) dehydration by thermopervaporation with a porous condenser (TPV-PC), the transport and separation characteristics of known commercial composite membranes with hydrophobic and hydrophilic properties are experimentally studied with respect to both the individual components (water, triethylene glycol) and TEG–water binary mixtures with various compositions. It is found that the most effective membrane for the TPV-PC dehydration of TEG is a PolyAn hydrophobic membrane (PolyAn GmbH, Germany) which demonstrates the maximum values of the permeate flux and pervaporation separation index. During the thermopervaporation separation of a TEG–water mixture (the water content in TEG of 30 wt %), a PolyAn membrane demonstrates the values of the water/TEG separation factor of 74 000 and permeate flux of 0.95 kg m⁻² h⁻¹. A long-term experiment on drying of 5 kg of a TEG–water solution is for the first time carried out using a PolyAn membrane. It turns out to be possible to reduce the water content from 30 down to 5 wt % over 113 hours of the thermopervaporation experiment on the dehydration of TEG.

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用多孔冷凝器进行三甘醇脱水的热过蒸发

对于用多孔冷凝器(TPV-PC)热蒸发脱水三甘醇(TEG)的任务，实验研究了已知的具有疏水性和亲水性的商用复合膜在单个组分(水，三甘醇)和不同组分的TEG -水二元混合物中的运输和分离特性。结果表明，对于TEG的TPV-PC脱水最有效的膜是PolyAn疏水膜(PolyAn GmbH, Germany)，其渗透通量和渗透蒸发分离指数均达到最大值。在TEG -水混合物(TEG中含水量为30 wt %)的热蒸发分离过程中，PolyAn膜的水/TEG分离系数为74000，渗透通量为0.95 kg m−2 h−1。首次使用聚安膜进行了5kg teg水溶液的长期干燥实验。结果表明，通过113小时的热蒸发脱水实验，可以将TEG的含水量从30%降低到5%。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.