The difference between 3a, 4a, 5a molecular sieves
The difference between 3a, 4a, and 5a molecular sieves is mainly due to the different uses, such as the difference in bulk density and compressive strength. Many people who do not understand will think that the difference between these different molecular sieves is in diameter. In fact, this is wrong. Let’s compare the differences and similarities of these three molecular sieves. 3A molecular sieve The bulk density is 680Kg/m³, and the compressive strength (N)≧80/P. Mainly used in the drying of petroleum cracking gas, olefin, gas training field, oil field equipment, and industrial dryer for chemical industry, medicine, hollow spirit, etc. 4A molecular sieve The bulk density is 680Kg/m³, and the compressive strength (N)≧80/P. Mainly used for the drying of natural gas and various chemical gases and liquids, refrigerants, medicines, electronic materials, and abnormal substances. 5A molecular sieve , The bulk density is 680Kg/m³, the compressive strength (N)≧80/P. Mainly used for natural gas drying, desulfurization, carbon dioxide removal, nitrogen and hydrogen separation, production of oxygen, nitrogen and hydrogen, petroleum dewaxing, etc. Molecular sieve has 3A/4A/5A/10X/13X and other models, each model has diameters of 0.4-0.8mm, 1-2mm, 1.6-2.5mm, 2-4mm, 3-5mm and 4-6mm. Molecular sieve.
What is 4A molecular sieves？
4A molecular sieves The selective adsorption performance of water is higher than any Other molecules. It is one of the most used molecular sieve varieties in industry. 4A molecular sieve is an alkali metal aluminosilicate that can adsorb water, NH3, H2S, sulfur dioxide, carbon dioxide, C2H5OH, C2H6, C2H4 and other molecules with a critical diameter not greater than 4A. It is widely used in the drying of gases and liquids, and can also be used in the refining and purification of certain gases or liquids, such as the production of argon. .content_box { border: 1px solid #333; padding: 20px; } .content_box img { max-width: 100%; height: auto; } .content_box h3 { text-align: center; } SLCMS-G1.3 | molecular sieves | Molecular Sieves Supplier Cms Carbon Molecular Sieve SLUHP-100 SLCMS-USP | Carbon Molecular Sieve We are Top Quality 4a Molecular Sieves,If you are interested in 4A molecular sieves,You can browse related products and initiate consultations on our website. { "@context" : "//schema.org", "@type" : "Article", "headline": "What is 4A molecular sieves", "image":"https://qiniu.digood-assets-fallback.work/536/20200526/1590507026_3A.png", "name" : "What is 4A molecular sieves", "author" : { "@type" : "Person", "name" : "ShanLi", "url": "https://www.cms-psa.com/" }, "datePublished" : "2021-10-23", "articleSection" : "4A molecular sieves", "articleBody" : "The 4A molecular sieve has a pore size of 4A, which absorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, and propylene. It does not adsorb any molecules larger than 4A in diameter (including propane). The selective adsorption performance of water is higher than any Other molecules. It is one of the most used molecular sieve varieties in industry.", "url" : "https://www.cms-psa.com/article/what-is-4a-molecular-sieves.html" }
Introduction of molecular sieve material
In the context of carbon neutrality, molecular sieves, a new material for adsorption and catalysis, have gradually attracted attention. A few days ago, at the 7th Molecular Sieve Technology and Application Summit Forum of Jianlong Micronano, more than 200 guests including China Gas Industry Association and heads of well-known domestic gas equipment companies gathered to discuss the application of molecular sieves in the energy, chemical industry and environmental fields. Molecular sieve adsorbents screen the carbon dioxide, nitrogen and other components in the air through physical adsorption, so as to achieve the purpose of purifying the target gas. Because molecular sieve has the advantages of high adsorption capacity, strong selectivity, and high temperature resistance, it has been widely used in many fields such as petrochemical industry, coal chemical industry, air separation and purification, environmental management and so on. At present, there are four major paths for feasible carbon neutral technologies, namely, energy transition, carbon capture and utilization, low-carbon life, and plant carbon sink. Liu Yingshu, director of the Institute of Gas Separation Engineering, University of Science and Technology Beijing and director of the Group Standards Committee of the China Gas Association, introduced at the forum that the above-mentioned technical paths can be found in the application of molecular sieves. In terms of carbon capture and utilization, molecular sieve adsorbents and catalysts are used to collect and store carbon dioxide, so as to achieve industrial carbon emission reduction and utilization; in terms of plant transformation, zeolite water-retaining agents and repair agents are used to fix water for soil moisturizing and repair, so as to achieve deserts. Fixed water afforestation, saline-alkali land restoration, etc. Data shows that steel plants across the country need a total of 130,000 tons of molecular sieve for oxygen production each year. In addition, in the field of hydrogen production, molecular sieves can not only be used for the recovery and purification of hydrogen in various industrial hydrogen-containing tail gas, but also help to reduce environmental pollution caused by tail gas emissions or direct combustion of tail gas. In addition to the above fields, molecular sieves also play an important role in the utilization of nuclear energy. According to Liu Zhihui, director of the Nuclear and Radiation Safety Center of the Ministry of Ecology and Environment of China, as an inorganic ion exchanger, molecular sieves have the advantages of high radiation resistance, mechanical, thermal and ionization stability. Molecular sieves were used in the treatment of radioactive waste water in the nuclear accident at the Fukushima nuclear power plant in Japan, and good results have been achieved. It is predicted that with the continuous growth of the oil and gas industry in emerging economies, the compound annual growth rate of the global molecular sieve market from 2020 to 2025 will be 5.65%, and it will reach 4.39 billion US dollars in 2025. On this subdivision track, there are already some listed companies with considerable strength. Molecular Sieve Material
Features of portable nitrogen generator
There is cryogenic nitrogen production, which uses low temperature to turn all the air into a liquid state, and then uses the different boiling points of different components of the gas to separate in the process of heating. The characteristics are: relatively large scale, relatively high purity, and large area. Long start-up time; Nitrogen production at room temperature is the use of adsorbents to separate oxygen and nitrogen in the air. The characteristic is that it requires a certain pressure, which occupies a small area, has a fast start-up speed, is small in scale, and has relatively low purity. Portable Nitrogen Generator
Method of remove hydrogen sulfide
Including iron hydroxide method, activated carbon method, Claus method and zinc oxide method. ① Iron hydroxide: Mix iron chips and wet wood chips thoroughly, add 0.5% calcium oxide to make a desulfurizer, with a humidity of 30-40%. The hydrogen sulfide reacts with the desulfurizer to be removed, and the regenerated iron hydroxide can be used continuously. The response is as follows: 2Fe(OH)3 3H2S─→Fe2S3 6H2O 2Fe2S3 6H2O 3O2─→4Fe(OH)3 6S This method has high desulfurization efficiency and is suitable for purifying gases with low hydrogen sulfide content. However, the equipment occupies a large area. Replacement by wet method, or combined with wet method for deep desulfurization. ②Activated carbon method: Activated carbon is used to absorb hydrogen sulfide, and oxygen is converted into monomer sulfur and water. The sulfur is washed away with amine sulfide, and the activated carbon can be used continuously. This method is not suitable for gas containing tar. ③ Claus process: Firstly, 1/3 of the hydrogen sulfide is converted into sulfur dioxide, and then it is reacted with the remaining hydrogen sulfide in the reformer to directly produce high-quality molten sulfur from the gas phase. ④Zinc oxide method: Granular zinc oxide reacts with hydrogen sulfide to produce zinc sulfide and water. Mainly used to purify waste gas with low hydrogen sulfide content. This method is more efficient, but not economical Remove Hydrogen Sulfide
Why can silica be used as a desiccant | Silica Drying Agent
Silica gel desiccant is a kind of high-activity adsorption material, the main component is silica, it is a kind of high-activity adsorption material. It is usually prepared by reacting sodium silicate with sulfuric acid and undergoing a series of post-treatment processes such as aging and acid foaming. Silica gel is an amorphous substance, its shape is transparent and irregular side sphere, and its chemical formula is mSiO2.nH2O. The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. The inside of silica gel desiccant is a very fine pore network structure. These pores can absorb water and retain water through its physical attraction. As a desiccant, it is widely used in aviation parts, computer devices, electronic products, and leather. Dry and moisture-proof in industries such as products, medicine and food. Even if the silica gel desiccant is completely immersed in water, it will not soften or liquefy. It has the characteristics of non-toxic, odorless, non-corrosive and non-polluting, so it can be in direct contact with any object. The most suitable hygroscopic environment for silica gel desiccant is room temperature (20~32℃), high temperature (60~90℃), it can reduce the relative humidity of the environment to about 40%, so the desiccant application range is very wide. Silica Drying Agent
