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A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification

Ethylene glycol (EG) is an essential reagent in the chemical industry including polyester and antifreeze manufacture. In view of the constantly expanding field of EG applications, the search for and implementation of novel economical and environmentally friendly technologies for the separation of or...

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Autores principales: Rostovtseva, Valeriia, Faykov, Ilya, Pulyalina, Alexandra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8956067/
https://www.ncbi.nlm.nih.gov/pubmed/35323787
http://dx.doi.org/10.3390/membranes12030312
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author Rostovtseva, Valeriia
Faykov, Ilya
Pulyalina, Alexandra
author_facet Rostovtseva, Valeriia
Faykov, Ilya
Pulyalina, Alexandra
author_sort Rostovtseva, Valeriia
collection PubMed
description Ethylene glycol (EG) is an essential reagent in the chemical industry including polyester and antifreeze manufacture. In view of the constantly expanding field of EG applications, the search for and implementation of novel economical and environmentally friendly technologies for the separation of organic and aqueous–organic solutions remain an issue. Pervaporation is currently known to significantly reduce the energy and resource consumption of a manufacturer when obtaining high-purity components using automatic, easily scalable, and compact equipment. This review provides an overview of the current research and advances in the pervaporation of EG-containing mixtures (water/EG and methanol/EG), as well as a detailed analysis of the relationship of pervaporation performance with the membrane structure and properties of membrane materials. It is discussed that a controlled change in the structure and transport properties of a membrane is possible using modification methods such as treatment with organic solvents, introduction of nonvolatile additives, polymer blending, crosslinking, and heat treatment. The use of various modifiers is also described, and a particularly positive effect of membrane modification on the separation selectivity is highlighted. Among various polymers, hydrophilic PVA-based membranes stand out for optimal transport properties that they offer for EG dehydrating. Fabricating of TFC membranes with a microporous support layer appears to be a viable approach to the development of productivity without selectivity loss. Special attention is given to the recovery of methanol from EG, including extensive studies of the separation performance of polymer membranes. Membranes based on a CS/PVP blend with inorganic modifiers are specifically promising for methanol removal. With regard to polymer wettability properties, it is worth mentioning that membranes based on hydrophobic polymers (e.g., SPEEK, PBI/PEI, PEC, PPO) are capable of exhibiting much higher selectivity due to diffusion limitations.
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spelling pubmed-89560672022-03-26 A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification Rostovtseva, Valeriia Faykov, Ilya Pulyalina, Alexandra Membranes (Basel) Review Ethylene glycol (EG) is an essential reagent in the chemical industry including polyester and antifreeze manufacture. In view of the constantly expanding field of EG applications, the search for and implementation of novel economical and environmentally friendly technologies for the separation of organic and aqueous–organic solutions remain an issue. Pervaporation is currently known to significantly reduce the energy and resource consumption of a manufacturer when obtaining high-purity components using automatic, easily scalable, and compact equipment. This review provides an overview of the current research and advances in the pervaporation of EG-containing mixtures (water/EG and methanol/EG), as well as a detailed analysis of the relationship of pervaporation performance with the membrane structure and properties of membrane materials. It is discussed that a controlled change in the structure and transport properties of a membrane is possible using modification methods such as treatment with organic solvents, introduction of nonvolatile additives, polymer blending, crosslinking, and heat treatment. The use of various modifiers is also described, and a particularly positive effect of membrane modification on the separation selectivity is highlighted. Among various polymers, hydrophilic PVA-based membranes stand out for optimal transport properties that they offer for EG dehydrating. Fabricating of TFC membranes with a microporous support layer appears to be a viable approach to the development of productivity without selectivity loss. Special attention is given to the recovery of methanol from EG, including extensive studies of the separation performance of polymer membranes. Membranes based on a CS/PVP blend with inorganic modifiers are specifically promising for methanol removal. With regard to polymer wettability properties, it is worth mentioning that membranes based on hydrophobic polymers (e.g., SPEEK, PBI/PEI, PEC, PPO) are capable of exhibiting much higher selectivity due to diffusion limitations. MDPI 2022-03-10 /pmc/articles/PMC8956067/ /pubmed/35323787 http://dx.doi.org/10.3390/membranes12030312 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Rostovtseva, Valeriia
Faykov, Ilya
Pulyalina, Alexandra
A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title_full A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title_fullStr A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title_full_unstemmed A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title_short A Review of Recent Developments of Pervaporation Membranes for Ethylene Glycol Purification
title_sort review of recent developments of pervaporation membranes for ethylene glycol purification
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8956067/
https://www.ncbi.nlm.nih.gov/pubmed/35323787
http://dx.doi.org/10.3390/membranes12030312
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