By Lzh | 08 February 2023 | 0 Comments
Why molecular sieve has strong hygroscopic capacity?
What is molecular sieve?
Molecular sieve is a kind of aluminosilicate compound with a cubic lattice. The molecular sieve has a uniform microporous structure, and its hole diameter is uniform. These holes can adsorb molecules smaller than their diameter to the inside of the hole cavity and have preferential adsorption capacity for polar molecules and unsaturated molecules. Therefore, it is called a molecular sieve. Because molecular sieve has advantages such as high adsorption capacity, strong thermal stability, and other advantages that other adsorbents do not have, molecular sieve has been widely used.
Effect of Crystallization Temperature and Time on Synthesis of Molecular Sieve Molecular Sieve
For synthesizing zeolite molecular sieves, temperature is a very important factor. The temperature change will affect the pressure change of water in the reactor, the polymerization state and polymerization reaction of aluminosilicate, the formation and dissolution and transformation of gel, the nucleation and growth of molecular sieves, and the crystal transformation between metastable phases. The same system may get completely different phases at different temperatures. The higher the temperature, the smaller the size and pore volume of zeolite; the density of the crystal skeleton increases accordingly. Generally, under 150 ° C, the primary structure is often a four-member or six-member ring. In comparison, when the temperature is higher than 150 ° C, it is often the primary structural unit of a five-member ring. It can be seen that under high-temperature hydrothermal conditions, there is a close relationship between the pore-forming law of inorganic substances (mainly aluminosilicate species) and the crystallization temperature and water vapor pressure.
Characteristics of molecular sieve
A molecular sieve has a strong hygroscopic capacity (so it is widely used as a desiccant) and is used for gas purification treatment. It should be avoided to be directly exposed to the air during storage. A molecular sieve that has been stored for a long time and has been hygroscopic should be regenerated before use. Molecular sieves should avoid oil and liquid water. It should be avoided to contact oil and liquid water as much as possible during use. Gases dried in industrial production include air, hydrogen, oxygen, nitrogen, argon, etc. Two adsorption dryers are used in parallel; one works, while the other can be regenerated. Alternate work and regeneration can ensure continuous operation of the equipment. The dryer works at 8-12 ℃ and is heated to 350 ℃ for gas flushing regeneration. The regeneration temperature of molecular sieves of different specifications is slightly different. Molecular sieves have a good catalytic effect on some organic gas phase reactions.
Price of molecular sieve
Molecular sieve particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of the molecular sieve. A large amount of large amount will be lower. The Price of the molecular sieve can be found on our company's official website.
Molecular sieve supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molecular sieve, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for a high-quality and cost-effective molecular sieve, you are welcome to contact us or inquire at any time.
Molecular sieve is a kind of aluminosilicate compound with a cubic lattice. The molecular sieve has a uniform microporous structure, and its hole diameter is uniform. These holes can adsorb molecules smaller than their diameter to the inside of the hole cavity and have preferential adsorption capacity for polar molecules and unsaturated molecules. Therefore, it is called a molecular sieve. Because molecular sieve has advantages such as high adsorption capacity, strong thermal stability, and other advantages that other adsorbents do not have, molecular sieve has been widely used.
For synthesizing zeolite molecular sieves, temperature is a very important factor. The temperature change will affect the pressure change of water in the reactor, the polymerization state and polymerization reaction of aluminosilicate, the formation and dissolution and transformation of gel, the nucleation and growth of molecular sieves, and the crystal transformation between metastable phases. The same system may get completely different phases at different temperatures. The higher the temperature, the smaller the size and pore volume of zeolite; the density of the crystal skeleton increases accordingly. Generally, under 150 ° C, the primary structure is often a four-member or six-member ring. In comparison, when the temperature is higher than 150 ° C, it is often the primary structural unit of a five-member ring. It can be seen that under high-temperature hydrothermal conditions, there is a close relationship between the pore-forming law of inorganic substances (mainly aluminosilicate species) and the crystallization temperature and water vapor pressure.
Characteristics of molecular sieve
A molecular sieve has a strong hygroscopic capacity (so it is widely used as a desiccant) and is used for gas purification treatment. It should be avoided to be directly exposed to the air during storage. A molecular sieve that has been stored for a long time and has been hygroscopic should be regenerated before use. Molecular sieves should avoid oil and liquid water. It should be avoided to contact oil and liquid water as much as possible during use. Gases dried in industrial production include air, hydrogen, oxygen, nitrogen, argon, etc. Two adsorption dryers are used in parallel; one works, while the other can be regenerated. Alternate work and regeneration can ensure continuous operation of the equipment. The dryer works at 8-12 ℃ and is heated to 350 ℃ for gas flushing regeneration. The regeneration temperature of molecular sieves of different specifications is slightly different. Molecular sieves have a good catalytic effect on some organic gas phase reactions.
Price of molecular sieve
Molecular sieve particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of the molecular sieve. A large amount of large amount will be lower. The Price of the molecular sieve can be found on our company's official website.
Molecular sieve supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molecular sieve, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for a high-quality and cost-effective molecular sieve, you are welcome to contact us or inquire at any time.
Leave a Reply
Your email address will not be published.Required fields are marked. *