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Model No.: keli
Artificial Graphite Type: Permeability of Graphite Class
Active Carbon Material: Coaly Activated Carbon
Carbon Content: High-Carbon
Pore Diameter: Macroporous
Manufacturing Method: Physical-Chemical Method of Activated Carbon
Type: Liquid-Phase Adsorption
Physical Properties: Pore Volume
Chemical Properties: Ph Value
Adsorption Properties: Methylene Blue Adsorption Value
Place of Origin: Ningxia China
Supply Ability: >100000ton
Port: Port of Shanghai,Port of Shenzhen,Port of Tianjin
Activated carbon adsorption occurs mainly because of surface energy. Adsorption (adsorption) is the material in the two-phase interface concentration phenomenon. Matter is made of molecules, and molecules are made of atoms or ions. Since the atoms or groups of atoms that make up the molecule bear the opposite charges, the molecules are electrically neutral to the outside. Since the atomic layer (surface, interface) constituting the outermost layer of a material is unbalanced due to the absence of atoms of the opposite outer layer, it has the effect of grasping other molecules in the outside world to balance their own electrical properties Trend --- Surface energy or surface potential; Due to the free flow of gases and liquids (collectively referred to as fluids), they are easily trapped by large surface solids. When a fluid is in contact with a porous solid, one or more components of the fluid accumulate (solidify) at the solid surface, a phenomenon known as "adsorption." The larger the surface, the stronger the electrical properties of the material. The tendency and ability to grasp other components to reduce their own surface potential energy is stronger. Because activated carbon has a large specific surface area, so that the most significant feature is the adsorption.
On the nature of activated carbon adsorption capacity, early research understanding is: activated carbon, such as decolorization, adsorption capacity is chemical or heat treatment after the "activation" has the nature, it is called "activated carbon" (activated carbon), it turns out that this is A misunderstanding Modern practice and theoretical studies have shown that: Activated carbon has a strong adsorption capacity, mainly because it has a special microcrystalline structure, and highly developed microporous and huge surface area.
All charcoal structures are based on graphite lattices and in some respects differ from graphite. The structure of graphite is a hexagonal network structure of large aromatic planar molecules, which is composed of layers stacked in three-dimensional order. Activated carbon, charcoal, coke and carbon black, forming a family called "amorphous carbon" carbonaceous material. The structure of these materials is more or less similar to the graphite structure, but compared with the graphite lattice, there are four aspects of the size of the ply, the degree of perfection of the hexagonal array of carbon atoms in the layer, the degree of planarization and the layer spacing Different degrees of difference.
Activated carbon adsorption not only shows the ability of physical adsorption, but also often shows the characteristics of chemical adsorption, which has a close relationship with the chemical composition of activated carbon surface. In practice, it is often found that activated carbons with similar pore size distribution and the same specific surface area show distinctly different adsorption properties due to different manufacturing methods. The main reason for this is that activated carbons prepared by different methods have different surface chemical compositions: water vapor prepared Activated carbon, oxygen mainly in the form of hydroxyl and carboxyl groups; zinc chloride production of activated carbon, carbonyl oxygen and ether oxygen accounted for a large proportion. Activated carbon surface polarity, acid-base and wettability directly affect the adsorption of the selectivity and catalytic properties.
In practice, the working principle of activated carbon in water treatment applications is taken as an example. The work of activated Carbon Filter is completed by carbon bed. Activated carbon particles composed of carbon bed has a very large number of micropores and huge surface area, with strong physical adsorption capacity. Water through the carbon bed, organic pollutants in the water is activated carbon adsorption. In addition, there are some oxygen-containing functional groups on the non-crystalline surface of the activated carbon, so that the organic pollutants in the water passing through the carbon bed are effectively adsorbed by the activated carbon. Activated carbon filter is a more commonly used water treatment equipment, as the water treatment desalination system pre-treatment can effectively ensure the life of equipment, improve water quality, prevent pollution, especially to prevent the reverse osmosis membrane, ion exchange resin, etc. Free-state residual oxygen poisoning pollution.
In the water quality pretreatment system, the activated carbon filter can adsorb residual chlorine that can not be removed in the pre-filtration to prevent the reverse-osmosis membrane of the subsequent stage from being oxidatively degraded. At the same time, it also adsorbs pollutants such as small molecule organic substances leaking from the previous stage.