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 Zeolite honeycomb molecular sieve
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Henan high-quality liquid phase honeycomb activated carbon manufacturer

2020-07-13
 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Liquid phase honeycomb activated carbon high quality Due to its large pore size, mesoporous materials have become a good carrier for molecular reaction with large size. However, the pore wall of mesoporous materials is amorphous, so their hydrothermal stability and thermal stability cannot meet the harsh conditions required for petrochemical applications. Because there are metal ions with low electricity price and large ion radius and water in the combined state, water molecules are continuously lost after heating, but the crystal skeleton structure remains unchanged, forming many cavities with the same size. The cavities are connected by many micropores with the same diameter. These tiny holes have uniform diameters, which can adsorb molecules smaller than the diameter of the hole into the interior of the hole, By excluding molecules larger than pores, molecules with different shapes, diameters, polarities, boiling points and saturation levels can be separated, Liquid phase honeycomb activated carbon manufactor It has the function of "screening" molecules, so it is called molecular sieve. At present, molecular sieves are widely used in metallurgy, chemical industry, electronics, petrochemical industry, natural gas and other industries.

 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Because there are uniform small internal pores in the molecular sieve structure, Liquid phase honeycomb activated carbon Henan When the molecular linear degree of reactants and products is close to the pore size of the crystal, the selectivity of catalytic reaction often depends on the corresponding size of the molecule and pore size. This selectivity is called shape selective catalysis. There are two mechanisms leading to shape selectivity. One is caused by the difference of diffusion coefficient of molecules participating in the reaction in the pore cavity, which is called mass transfer selectivity; The other is caused by the space limitation of the transition state of the catalytic reaction, which is called transition state selectivity. Molecular sieve has clear pore cavity distribution, extremely high internal surface area (600m2/s), good thermal stability (1000 ℃), and adjustable acid site center. The acidity of molecular sieve mainly comes from three coordinated aluminum atoms and aluminum ions (AlO)+on the framework and in the pores. The OH based acid sensitive site center on the molecular sieve HY obtained by ion exchange, and the aluminum ion outside the framework will strengthen the acid site, forming the L acid site center. Polyvalent cations such as Ca2+, Mg2+and La3+can show the acid site center after exchange. The reduction of transition metal ions such as Cu2+and Ag+can also form acid site centers. In general, the higher the Al/Si ratio, the higher the specific activity of OH group. The modification of zeolite acidity can introduce protons through direct exchange of dilute hydrochloric acid. Liquid phase honeycomb activated carbon high quality This method often leads to dealumination of molecular sieve framework. So NaY will become NH4Y and then HY.

 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Honeycomb zeolite molecular sieve is an efficient molecular sieve carrier with good adsorption performance, no secondary pollution and high temperature regeneration. It is widely used in the fields of adsorption, separation, catalysis and environment, Liquid phase honeycomb activated carbon high quality It is more suitable for the treatment of organic waste gas with large air volume and low concentration. It is widely used in the production of basic organic chemical industry and petrochemical industry, as well as in the treatment of harmful gases, SO2 NOx、CO、CO2,NH3,CCl4、 Purification of water vapor and gaseous hydrocarbon waste gas. Strong adsorption selectivity: molecular sieve materials with different properties and pore sizes are configured for the product according to the different components of organic waste gas, so as to achieve targeted and selective treatment of organic waste gas, meet the design requirements and meet the emission standards. 2. Strong adsorption capacity: even if the gas composition concentration is very low at the mg level, it still has the adsorption capacity. The efficiency is 50% higher than that of similar activated carbon. 3. Wide adaptability of adsorption temperature: at a higher temperature, it still has a large adsorption capacity, while other adsorbents are greatly affected by temperature, so under the same temperature, the adsorption capacity of molecular sieve is large. 4. Good regeneration temperature resistance: the concentration ratio of pollutants after adsorption and concentration by molecular sieve can reach 15 to 20 times, and the concentrated waste gas can be condensed and recovered or burned at high temperature as required 5. High strength: Liquid phase honeycomb activated carbon manufactor Products coming to the company use special framework materials to make the positive pressure strength of honeycomb zeolite reach more than 3Mpa, which can reduce damage during transportation and installation.

 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Honeycomb zeolite molecular sieve is a kind of aluminosilicate material containing alkali metal or alkaline earth metal oxide with open framework and regular pore cage structure. It has been widely used since it was discovered by Swedish scientists in 1956, and then it has been widely used in petrochemical industry, environmental protection, bioengineering and other fields due to its special physical characteristics. Liquid phase honeycomb activated carbon high quality And with the gradual expansion of the demand for zeolite molecular sieves, researchers began to expand a variety of synthetic methods of zeolite molecular sieves to meet the needs of various fields. Zeolite molecular sieve has super strong adsorption performance, which is due to a "surface force" generated by molecular gravity on the solid surface. When the fluid flows, some molecules in the fluid collide with the adsorbent surface due to irregular movement, resulting in molecular concentration on the surface, reducing the number of such molecules in the fluid to separation Purposes of clearing. Liquid phase honeycomb activated carbon manufactor Since the adsorption does not undergo chemical changes, as long as the molecules concentrated on the surface are managed to drive away, the zeolite molecular sieve will have the adsorption capacity again. This process is the reverse process of adsorption, which is called the resolution or regeneration process.

 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Molecular sieve has clear pore cavity distribution, extremely high internal surface area (600m2/s), good thermal stability (1000 ℃), and adjustable acid site center. The acidity of molecular sieve mainly comes from three coordinated aluminum atoms and aluminum ions (AlO)+on the framework and in the pores. OH based acid sensitive site center on molecular sieve HY obtained by ion exchange, Liquid phase honeycomb activated carbon Henan The aluminum ions outside the framework will strengthen the acid site and form the L acid site center. Polyvalent cations such as Ca2+, Mg2+and La3+can show the acid site center after exchange. The reduction of transition metal ions such as Cu2+and Ag+can also form acid site centers. In general, the higher the Al/Si ratio, the higher the specific activity of OH group. The modification of zeolite acidity can introduce protons through direct exchange of dilute hydrochloric acid. This method often leads to dealumination of molecular sieve framework. So NaY will become NH4Y and then HY. Because there are uniform small internal pores in the molecular sieve structure, when the molecular linearity of reactants and products is close to the pore size of the crystal, the selectivity of the catalytic reaction often depends on the corresponding size of the molecule and pore size. Liquid phase honeycomb activated carbon high quality This selectivity is called shape selective catalysis. There are two mechanisms leading to shape selectivity. One is caused by the difference of diffusion coefficient of molecules participating in the reaction in the pore cavity, which is called mass transfer selectivity; The other is caused by the space limitation of the transition state of the catalytic reaction, which is called transition state selectivity.

 Henan high-quality liquid phase honeycomb activated carbon manufacturer

Liquid phase honeycomb activated carbon Henan Because the aluminum oxide tetrahedron of zeolite has a negative charge, and the skeleton hole contains cations, a strong electric field is formed around the cations. Therefore, the adsorption force of zeolite not only has a strong dispersion force, but also has a large electrostatic force. It is precisely because of this electrostatic relationship that zeolites have preferential selective adsorption on polar, unsaturated and polarizable molecules. It can strongly adsorb molecules containing polar groups such as hydroxyl ion, ammonium ion and other polarizable groups, especially water, which can form hydrogen bonds with aluminum silicon skeleton, so zeolite has strong water absorption. It can still adsorb even under low relative humidity and concentration, and its water absorption is higher than that of silica gel and activated alumina. The main material of honeycomb zeolite adsorbent is natural zeolite. The manufacturer of zeolite is composed of silica Inorganic microporous material composed of al_2o_3 and alkaline metal or alkaline earth metal, with inner pore volume accounting for 40-50% of the total volume and specific surface area of 100-500 m2/g, is characterized by high temperature resistance, non flammability, good thermal stability and hydrothermal stability. It is an efficient molecular sieve carrier with good adsorption performance, no secondary pollution, and can be regenerated at high temperature. Compared with honeycomb activated carbon, its performance is about 25% of its efficiency, However, it is widely used in the fields of adsorption, separation, catalysis and environment due to its high temperature resistance and difficult ignition. It is more suitable for the treatment of organic waste gas with large air volume and low concentration.