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What is a pervaporation membrane and what are its characteristics

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I don't know if everyone is familiar with pervaporation membranes. Simply put, pervaporation is an emerging membrane separation technology. The membrane material is the key to achieving energy-saving, high-efficiency and other characteristics in the PV process. So what is a pervaporation membrane and what are its characteristics? Today, the editor will help everyone summarize the relevant knowledge.
Pervaporation process (PV) is the process of separating or enriching a portion of an organic mixture by utilizing the selective absorption and desorption of each component in the mixed solution by a polymer membrane, as well as the different diffusion rates of each component within the membrane. Its outstanding advantage: it can achieve separation tasks that are difficult to complete by traditional methods such as distillation, extraction, and adsorption with low energy consumption, especially suitable for the separation of near boiling point, constant boiling point mixtures, isomers, and compounds with poor thermal stability that are difficult or cannot be separated by ordinary distillation. The removal of trace amounts of water from organic solvents and mixed solvents, as well as the separation of small amounts of organic pollutants from wastewater, has significant economic and technological advantages and has been widely used in many industrial production fields such as petroleum, chemical, pharmaceutical, and environmental protection.
Characteristics and classification of pervaporation membranes
1. Compared with traditional separation technologies such as distillation and reverse osmosis, pervaporation membranes have the following characteristics:
(1) Efficient, with a high separation coefficient, approximately twice that of the reverse osmosis method.
(2) Low energy consumption, saving 12-1/3 energy compared to azeotropic distillation method.
(3) The process is simple, with minimal additional processing and easy operation.
(4) The process does not introduce other reagents, and the product and environment will not be contaminated; (6) Facilitate coupling and integration with other processes for amplification.
2. Classification of Pervaporation Membranes
According to the composition of the separation system, pervaporation membranes can be divided into: water prioritized membrane, organic liquid prioritized membrane, and organic liquid/organic liquid selective separation membrane.
According to the morphology of the membrane, pervaporation membranes can be divided into flat membrane, hollow cellulose membrane, and tubular membrane. Currently, flat membrane is mainly used
According to the material of the membrane, it can be divided into organic membrane and inorganic membrane.
I don't know how much knowledge everyone has learned after reading the summary and introduction of the characteristics and classification of pervaporation membranes mentioned above. Actually, this knowledge is helpful for many unfamiliar people, so if you want to reserve more relevant knowledge, take a look at all of the above knowledge.