What is Powder Activated Carbon Filtration?
Hard-to-degrade and toxic compounds in wastewater can be adsorbed by using activated carbon. Powdered activated carbon (PAC) treatment is mainly used to remove persistent organic compounds (e.g., pesticides and biocides) and organic compounds.
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Activated Charcoal Powder for Food
Wood activated carbon powder is made from high quality fuelwood, wood chips, wood blocks, using advanced process, such as physical method, phosphoric acid method, zinc chloride method. Its has comparison area, large adsorption capacity, fast filtration speed and high ignition point, Widely used in food and beverage decolorization and other fields.
This product uses natural high-quality wooden and coal as raw material, adopts advanced equipment and scientific technology, and is processed through screening, phosphoric acid mixing, high temperature carbonization activation, rinsing and other processes to form black powder.
Wood columnar activated carbon is made from high quality fuelwood, wood chips, wood blocks, using advanced process, such as physical method, phosphoric acid method, zinc chloride method. Its has comparison area, large adsorption capacity, fast filtration speed and high ignition point, Widely used in food and beverage decolorization and other fields.
Black Charcoal Wood Pellets Activated
Take high quality coal or wood as raw materail
It is black pellets with large specific surface area
Deveoped and reasonable pore structure
Powder Activated Carbon Filtration
Specific Surface Area:600-1500㎡/g
Iodine Value:600-1300mg/g
Moisture:<10%
The wood based powder activated carbon is widely used in amino acid industry, refined sugar decoloring, monosodium glutamate industry, glucose industry, starch sugar industry, food additive, one-stop solution of pigment.
Advantages of Wood Activated Carbon Powder
Highly Porous Material
Activated carbon powder has a high surface area, providing an extensive surface for the adsorption of impurities.
Efficient
The high surface area and porosity of activated carbon powder make it an efficient adsorbent, removing impurities quickly and effectively.
Versatile
Activated carbon powder can be customized to meet specific application requirements, making it a versatile material for a wide range of industries.
Environmentally Friendly
Wood-based activated carbon powder is a sustainable and renewable material, making it an environmentally friendly choice for many applications.
Application of Wood Activated Carbon Powder
Wood-based activated carbon production use superior fuelwood, sawdust, and wood chips as raw materials, adopts physical method, phosphoric acid method, and zinc chloride method, and processes all materials into activated carbon.
The mesoporous structure and specific surface area of wood-based activated carbon are more developed so that its adsorption capacity is large and the filtration speed is fast. High strength low ash, reasonable pore size distribution; High ignition point.
• Gas phase adsorption.
• BRecovery of organic solvents such as benzene series gas toluene, xylene, recovery of acetone in the acetate fiber industry, recovery of CS2 in the production of viscose staple fiber, etc.
• High adsorption and desorption properties, thereby greatly improving the recovery rate of solvents. Elimination of harmful gases, glutamic acid and salt, lactic acid and salt, citric acid and salt, wine, condiments, animal and vegetable protein, biochemical Decolorization, refining, deodorization, decontamination and impurity removal of.
How Powdered Activated Carbon Acts as a Catalyst Support?
Specific surface area and pore structure: Select powdered activated carbon with a specific surface area and pore structure suitable for the needs of the catalytic reaction. A large specific surface area usually means more active sites, and different pore sizes also affect the adsorption and diffusion of different reactant molecules.
Pretreatment: In order to remove possible contaminants and impurities on the surface of activated carbon, a pretreatment step such as acid washing or heat treatment can be performed. Pretreatment can improve the surface cleanliness and activity of activated carbon.
Solution impregnation method
The precursor of the active component of the catalyst is dissolved in a solution, and then the powdered activated carbon is soaked in the solution.
The active component enters the interior and surface of the activated carbon through adsorption and pore capillary action.
The precursor is then converted into an active form through a drying and calcination process.
Co-deposition method
Activated carbon is mixed with a catalyst metal salt solution, and metal ions are deposited on the surface of the activated carbon through a chemical reaction.
It is common to mix activated carbon with metal salts and then introduce a reducing gas, such as H₂, to reduce the metal ions and deposit them on the activated carbon.
Chemical vapor deposition (CVD)
Using gas phase precursors, the catalyst components are generated and deposited on the surface of activated carbon through gas phase chemical reactions at high temperatures.
This method usually ensures that the catalyst particles are evenly distributed and have a small particle size.
Drying: Dry the activated carbon at an appropriate temperature to remove solvent residues.
Calcination: Calcination at high temperature (usually in an inert gas or reducing atmosphere) to convert the catalyst precursor into an active form (such as oxide, metallic state, etc.).
Activation treatment: Further treatment is carried out according to actual needs, such as reduction treatment to improve catalyst activity.
Characterization of the structure and properties of activated carbon carriers: The structure and distribution of activated carbon and catalysts are analyzed using BET specific surface area determination, XRD, SEM, TEM and other technologies.
Catalytic performance test: Characterization test and catalytic reaction test are carried out to evaluate the activity, selectivity and stability of the catalyst.
Adjustment and optimization: According to the test results, the ratio of activated carbon and active components, loading method and treatment conditions are adjusted to optimize the catalyst performance.
Activated Carbon - How It Works and Why It's Effective
● How is activated carbon formed?
Thermal or chemical processes are employed to activate carbon. Thermal processes induce partial oxidation of the coal. This generates pores while avoiding gasification and excessive loss of coal. This occurs at temperatures between 600 and 1100 °C. Chemical processes, commence from raw materials before carbonisation.
The term "carbonisation" pertains to the process of extracting pure carbon by heating a carbonaceous source, such as coal, peat, or other organic carbonaceous substances. This heating technique is termed pyrolysis. The material is carbonised at a low temperature (around 550 °C) and subsequently washed to eliminate reagent residues and other by-products.
Once oxidation is complete, activated carbon can then be tailored for various uses. For instance, granular activated carbon (GAC), powdered activated carbon (PAC), and extruded activated carbon (EAC).
GAC consists of irregularly shaped particles ranging from 0.2 to 5 mm. This versatile type is found in both liquid and gas phases. It features a sand-like structure with larger grains compared to powdered activated carbon (PAC).
PAC is carbon that has been ground to a size smaller than 0.18 mm. This is primarily employed in liquid-phase applications and for flue gas treatment.
EAC is extruded and adopts a cylindrical shape with diameters spanning from 0.8 to 5 mm. Due to their excellent mechanical strength, minimal dust content, and low-pressure loss, these are predominantly used for gas-phase applications.
● How does it work?
Activated carbon is commonly used in water filtration systems. It aids in reducing unwanted odours, enhancing water clarity, and removing chlorine. However, it is ineffective at getting rid of viruses, fluoride, some metals, or some hazardous chemicals. In addition, alcohol is only marginally adsorbable by activated carbon, making it ineffective as a removal agent.
Chlorine, tannins, phenol, chloramine, hydrogen sulphide, and other volatile chemicals that cause smells, as well as some medications and small amounts of metals including iron, mercury, and chelated copper, are all filtered by activated carbon.
However, it leaves behind nitrates, nitrites, ammonia, fluoride, sodium, substantial levels of heavy metals like iron or copper, substantial concentrations of hydrocarbons like petroleum distillates, and other microorganisms including bacteria, viruses, and protozoa.
The phenomenon linked to the adsorption of activated carbons is connected to van der Waals forces that take place between molecules. This interaction is the weakest of all intermolecular forces that hold molecules together. The force that takes place here is short-ranged and is sensitive between the carbon surface and the adsorbate molecule. Activated carbon is also additive, thus making it have the strongest physical adsorption forces.
● Activated Carbon's effectiveness
Several factors influence the effectiveness of activated carbon's adsorption:
Pore Size and Distribution: Pore size impacts the types of molecules absorbed; smaller pores capture gases, while larger ones tackle larger molecules and particles.
Contact Time: Longer contact time enhances thorough adsorption, but particle considerations must be balanced.
Temperature and pH: Higher temperatures boost adsorption, but extreme temperatures may alter absorbate molecules. pH affects the surface charge of both carbon and absorbate, influencing overall attraction.
Regulatory quality indicators are in place for these materials. They are porous adsorbent, and are made from organic materials containing carbon.Production of activated carbon is carried out using charcoal, peat (peat coke) or coal coke.
It is possible to obtain charcoal for the production of activated carbons from the following types of raw materials:
• Firewood and woodworking waste of various species: Birch, oak, beech, hornbeam and more.
• The shells of various nuts: Walnut, coconut, almond, hazelnut, etc.
• Fruit pits: Olives, apricot, peach, mango, avocado and other stone-fruits.
• Other woody plant waste.
Classification of Active Carbons
Active carbons can be divided into the following types according to their use:
• Activated carbons for adsorption of gases and vapors
• Activated carbons for adsorption from the liquid phase
• Activated carbons as the core of catalysts and chemical absorbers
Classification of activated carbon can also be made according to other factors. Among them, the following distinctions may be made:
• Raw material of the activated carbon: Wood, coal, coconut shell and so on.
• Descriptors: Clarifying, gas, coal-bearing catalysts with the qualities of chemical sorbents.
• Activation techniques: Steam and thermo-chemical method.
• Forms of presentation: Granular (crushed) activated carbon, powder, molded activated carbon, extruded carbon (granules in the form of cylinders) and a fabric that is impregnated with coal.
Our Factory
Hongsen company, founded in 2000, is a professional manufacturer of activated carbon in Shijiazhuang City, Hebei Province, and currently produces various multi-purpose series of activated carbon. The company has passed ISO9001:2008 quality management system. The company researches and develops various series of activated carbon, forming a vertically integrated business structure from raw material collection and processing to product terminal sales.
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