What is carbon molecular sieve？
carbon molecular sieve - Adsorbent for metal heat treatment, etc. Carbon molecular sieve is a new type of adsorbent developed in the 1970s. It is a kind of excellent non-polar carbon-based cellulose material. Carbon Molecular Sieves (CMS) is used for separation and enrichment of air. Nitrogen adopts a normal temperature and low pressure nitrogen production process, which has the advantages of less investment cost, faster nitrogen production speed, and lower nitrogen cost than the traditional cryogenic high pressure nitrogen production process. Therefore, it is currently the preferred pressure swing adsorption (PSA) nitrogen-rich adsorbent for air separation in the engineering industry. This nitrogen is used in the chemical industry, oil and gas industry, electronics industry, food industry, coal industry, pharmaceutical industry, cable industry, and metal It is widely used in heat treatment, transportation and storage. R & D background In the 1950s, with the tide of the industrial revolution, the application of carbon materials became more and more extensive. Among them, the application field of activated carbon was PSA carbon molecular sieve for nitrogen production. The expansion is the fastest, from the initial filtration of impurities to the separation of different components. At the same time, with the advancement of technology, mankind's ability to process materials has become stronger and stronger. In this case, carbon molecular sieves have emerged. Main components of carbon molecular sieve The main component of carbon molecular sieve is elemental carbon, and the appearance is a black columnar solid. Because it contains a large number of micropores with a diameter of 4 angstroms, the micropores have a strong instantaneous affinity for oxygen molecules and can be used to separate oxygen and nitrogen in the air. The pressure swing adsorption device (PSA) is used in industry to produce nitrogen. Carbon molecular sieve has large nitrogen production capacity, high nitrogen recovery rate and long service life. It is suitable for various types of PSA nitrogen generators and is the first choice for PSA nitrogen generators. Carbon molecular sieve air separation nitrogen production has been widely used in petrochemical, metal heat treatment, electronics manufacturing, food preservation and other industries. working principle Carbon molecular sieve uses the characteristics of sieving to achieve the purpose of separating oxygen and nitrogen. When the molecular sieve adsorbs impurity gas, the macropores and mesopores only play the role of channels, transporting the adsorbed molecules to the micropores and submicropores, and the micropores and submicropores are the real adsorption volume. As shown in the previous figure, the carbon molecular sieve contains a large number of micropores. These micropores allow molecules with a small dynamic size to rapidly diffuse into the pores while restricting the entry of large-diameter molecules. Due to the difference in the relative diffusion rate of gas molecules of different sizes, the components of the gas mixture can be effectively separated. Therefore, when manufacturing carbon molecular sieves, according to the size of the molecules, the distribution of micropores inside the carbon molecular sieve should be 0.28 to 0.38 nm. Within the size range of the micropores, oxygen can quickly diffuse into the pores through the pores of the micropores, but it is difficult for nitrogen to pass through the pores of the micropores, thereby achieving oxygen and nitrogen separation. The pore size of the carbon molecular sieve is the basis for the separation of oxygen and nitrogen. If the pore size is too large, oxygen and nitrogen molecular sieves can easily enter the pores and cannot separate; and if the pore size is too small, neither oxygen nor nitrogen can enter. In the micropores, there is no separation effect. SLCMS-USP | Carbon Molecular Sieve PSA Nitrogen Equipment SLCMS-HP1 3A Molecular Sieve We are carbon molecular sieve,If you are interested in carbon molecular sieve,You can browse related products and initiate consultations on our website.
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" }
The specific role of activated carbons
After the house is renovated, many people will think of using activated carbons to purify the indoor air, but there are many activated carbons products on the market, and people who don’t know activated carbon don’t know how to choose. The following editor will introduce the role of activated carbons. 1. Activated carbons indoor deodorization: Put a few bags of activated carbons in the toilet, kitchen, refrigerator, shoe cabinet, and shoes, and the peculiar smell will disappear without a trace. 2. Indoor detoxification of activated carbons: It can adjust indoor air, absorb toxic and harmful chemical gases emitted by decorative materials such as ammonia, formaldehyde, volatile organic compounds, benzene, toluene, etc., and adjust indoor space humidity. 3. Activated carbons indoor environmental protection: Activated carbons can be placed in offices, offices, reception rooms, hotels, air-conditioned rooms, entertainment venues, new furniture, cars, etc., to deodorize, disinfect, and purify the air. 4. Fool-proof and mildew-proof activated carbons: Preserving ancient books and calligraphy can make precious ancient books and calligraphy always true and safe. The adsorption catalytic function can easily prevent the growth of mold, which not only solves the mold problem, but also eliminates the unpleasant musty smell. 5. Activated carbons indoor sterilization: It can effectively remove the large intestine, Staphylococcus aureus, white ringworm, mold, pyogenic bacteria, Pseudomonas aeruginosa and other bacteria, and inhibit the spread of enterovirus, influenza, filter diseases, and viruses.
Application of activated carbons in water treatment
According to statistics, the industrial wastewater discharged every year in my country is about 8×108 m3, which not only contains highly toxic components such as cyanide, but also contains metal ions such as chromium, zinc, and nickel. There are many wastewater treatment methods, mainly chemical precipitation method, electrolysis method and membrane treatment method, etc. This article introduces the activated carbons adsorption method. Activated carbon has a huge surface area and has high physical adsorption and chemical adsorption functions. Therefore, the activated carbon adsorption method is widely used in wastewater treatment. And it has the characteristics of high efficiency and good effect. Activated carbons is a specially treated carbon with numerous small pores and a huge surface area, with a surface area of 500-1500 square meters per gram of activated carbon. Activated carbon has strong physical adsorption and chemical adsorption functions, and it also has detoxification effects. The detoxification effect is to use its huge area to adsorb the poison in the micropores of the activated carbon, thereby preventing the absorption of the poison. At the same time, activated carbon can be combined with a variety of chemical substances to prevent the absorption of these substances. There are many types of activated carbon used in production. Generally made into powder or granular. Powdered activated carbon has strong adsorption capacity, is easy to prepare and low in price, but it is difficult to regenerate and generally cannot be reused. The granular activated carbon is more expensive, but it can be reused after regeneration, and the working conditions during use are better, and the operation and management are convenient. Therefore, granular activated carbon is often used in water treatment. Activated carbon adsorption refers to the use of the solid surface of activated carbon to adsorb one or more substances in water to achieve the purpose of purifying water.
Precautions for the use of activated carbons
1. Clean and remove dust before use, otherwise these black dust may temporarily affect the cleanliness of water quality. However, it is not recommended to wash it directly with fresh tap water, because once the porous activated carbon absorbs a large amount of chlorine and bleach in the tap water, it will damage the water quality when it is placed in the filter for use. I believe I don't need to say more. Remember to rinse the activated carbon with clean water about 4 times before putting it in the water to remove the activated carbons ash, so as not to stain the water tank and fish. Communicate with each other. The use of activated carbons can remove the fishy smell. 2. It is impossible to clean the clogged debris in the porous pores of activated carbons by simple cleaning in ordinary times. Therefore, the activated carbons must be replaced regularly to prevent the activated carbon from losing its effectiveness due to "saturation of adsorption". And the timing of the replacement is best not to wait for it to fail before replacing it, so as to ensure that the activated carbon can continuously remove the harmful substances in the water quality of the aquarium. It is recommended to replace it 1-2 times a month! 3. The efficiency of activated carbons to treat water quality is related to its treatment dosage, usually "the effect of treating water quality with more dosage is relatively good." 4. After the quantitative activated carbons is used, you should always observe the changes in water quality in the initial stage of use, and pay attention to the observation results, as the basis for judging the time for the replacement of activated carbons after failure. 5. When using medicines to treat fish diseases, the activated carbon should be temporarily taken out and the use should be suspended. In order to prevent the drug from being adsorbed by activated carbon and reducing the therapeutic effect. The efficiency of activated carbons depends on many factors. The shorter the aquarium installation time, the more frequent the replacement of activated carbon (about once a month). The longer the aquarium installation time, the more effective the activated carbon is in the aquarium. The longer it takes (about four months or more).
