What are the aspects of activated carbon that are used more in industry?

What is the range of applications for activated carbon?

With the development of science and technology, activated carbon is now widely used in industrial and civil industries. It also promotes the continuous progress of activated carbon technology. The following is a brief description of the important role of activated carbon in various industries.

1. Petrochemical industry.

Alkali-free deodorization (refined demercaptan) - a re-urged refining device.

Ethylene demineralized water (refined filler) – ethylene plant.

Catalyst carriers (palladium, platinum, rhodium, etc.) – styrene, continuous reforming unit water purification and wastewater treatment – advanced treatment of upstream and sewer.

2. Electric power industry.

Power Plant Water Treatment and Protection – Boiler Installations.

3. Chemical industry.

Decolorization and refining of chemical catalysts and carriers, gas purification, solvents**, and oils, etc., 4.

Refining and decolorization of beverages, alcohol, monosodium glutamate mother liquor and food.

5. **Industry.

**Extraction - applicable to carbon slurry method, heap leaching method gold extraction process.

Tailings** – Waste utilization and environmental protection in gold mines.

6. Environmental protection industry.

It is used for sewage treatment, waste gas and harmful gas treatment, gas purification 7, and related industries.

Cigarette filters, wood floor moisture-proof, odor absorption, automobile gasoline evaporation pollution control, preparation of various impregnating agent liquids, etc.

In recent years, activated carbon and honeycomb activated carbon have been widely used, and the number of applications is also increasing. It is obtained from raw materials such as coal, wood and fruit husks, which are carbonized, activated and post-processed. At present, there are four most common shapes of tangible activated carbon, powdered activated carbon, activated carbon fiber and granular activated carbon.

The following is an introduction to what activated carbon is and what are the functions of activated carbon.

1. What is activated carbon?

Activated carbon is also known as activated carbon black. It is amorphous carbon in the form of black powder or granules. In addition to carbon, the main components of activated carbon include oxygen, hydrogen and other elements.

Activated carbon is a porous carbon with low bulk density and large specific surface area due to the irregular arrangement of microcrystalline carbon and fine pores between the cross-connections, which will produce carbon structure defects when activated. Activated carbon is odorless, tasteless, sand-free, insoluble in any solvent, has selective adsorption capacity for various gases, and has high capacity adsorption capacity for organic pigments and nitrogen-containing alkalis. The total surface area per g can reach 500 1000 m2.

The relative density is about, and the apparent relative density is about.

Second, the role of activated carbon.

Activated carbon is a very fine carbon particle with a large surface area, and there are even finer porous capillaries in the carbon particle. This capillary has a strong adsorption capacity and is in full contact with gases (impurities) due to the large surface area of the carbon particles. When these gases (impurities) touch the capillaries, they are adsorbed and purified.

The function of activated carbon is mainly used to adsorb harmful gases, filter out insolubility, and adsorb some solubility. The components of activated carbon are mainly made of charcoal, various husks and high-quality coal as raw materials, and are processed and manufactured through a series of processes such as crushing, screening, catalyst activation, rinsing, drying and screening of raw materials by physical and chemical methods. The role of activated carbon in the first world was to make gas masks, and later the role of activated carbon was mainly used in waterworks to deodorize with activated carbon.

3. Activated carbon use.

1. New room: It is used to adsorb formaldehyde, benzene, ammonia and radon and other toxic and harmful gases in the air in the air of the new house, and quickly remove the odor of decoration.

2. New furniture: used to adsorb formaldehyde, benzene series, and various peculiar smells continuously released by new furniture.

3. Wardrobe, bookcase, shoe cabinet: deodorization, detoxification, dehumidification, insect prevention, deodorization, sterilization, preservation of calligraphy and painting, etc.

4. Bathroom: deodorization, sterilization, fresh air.

5. Floor: odor, moisture-proof, mildew-proof, insect-proof, and protect the floor from deformation.

6. Automobile: adsorb all kinds of harmful gases in the new car and various peculiar smells in the old car.

7. Computers, household appliances, etc.: adsorption and reduce the harm of radiation gas to people.

8. Offices, hotels and other public places: purify the air and eliminate odors.

In recent years, more and more people are decorating new houses, and formaldehyde removal products on the market are emerging in endlessly, many formaldehyde removal products have exaggerated publicity, and some products may even lead to secondary pollution and harm to the human body. However, there are many ways for activated carbon to remove formaldehyde. So, let me introduce you to the properties of activated carbon and the role of activated carbon.

What are the properties of activated carbon.

1. Chemistry.

In addition to physical adsorption, there is also chemical adsorption of activated carbon. The adsorption of activated carbon depends on both the pore structure and the chemical composition. Activated carbon not only contains carbon, but also contains a small amount of oxygen and hydrogen that are chemically bound and functionally activated, such as carbonyls, carboxyl groups, phenols, lactones, quinones, and ethers.

These surfaces contain oxides and complexes, some of which are derived from the derivatives of the raw material, and some of which are formed by the action of air or water vapor during and after activation. Surface sulfides and chlorides are also sometimes formed. In the activation process, the minerals contained in the raw materials are concentrated in the activated carbon to become ash, and the main components of the ash are salts of the metal and the earth metal, such as carbonate and phosphate.

2. Catalysis.

Activated carbon exhibits catalyst activity in many adsorption processes with catalytic willingness. For example, activated carbon adsorbs sulfur dioxide and catalytically oxidizes it to sulfur trioxide. Due to the presence of specific surface oxygenates or complexes, activated carbon has catalyst activity for a variety of reactions, such as the generation of phosgene from chlorine and carbon monoxide.

Due to the formation of complexes between the activated carbon and the carrier, this complex catalyst greatly increases the catalytic activity, such as the activated carbon carrying palladium salt, even in the absence of a catalyst for copper salts, the oxidation of olefins can be catalyzed with high speed and selectivity. Due to its well-developed pore structure, huge internal surface area and good heat resistance, acid resistance, and pyrine resistance, activated carbon can be used as a catalyst carrier. For example, in the reactions of hydrogenation, dehydrogenation, cyclization, isomerization and other reactions in organic chemistry, activated carbon is an excellent carrier for platinum and palladium catalysts.

3. Mechanical.

1) Particle size: A set of standard sieve sieving method is used to find the weight of activated carbon left in and through each sieve, which indicates the particle size distribution.

2) Static density or bulk density: the weight of activated carbon per unit volume of dietary pore volume and intergranular void volume.

3) Bulk density and particle density: the weight of activated carbon per unit volume of dietary pore volume without dietary inter-particle pore volume.

4) Strength: that is, the crushing resistance of activated carbon.

5) Abrasion resistance: that is, the performance of abrasion resistance or anti-friction.

The role of activated charcoal.

Activated carbon is generally used for filtration and decolorization, as a reducing agent and as an absorbing gas. According to its application field, the specific role of activated carbon is different. For example, during World War II, activated charcoal was used in gas masks; Tap water can be deodorized with activated carbon; Used at home, activated carbon can purify the air and remove harmful substances.

It is precisely because of this series of advantages of activated carbon that many families have also begun to use activated carbon to improve the air quality in their homes.

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1. Water purification function of activated carbon: Activated carbon can remove residual chlorine, colloids, organic matter, heavy metals (such as mercury, silver, cadmium, chromium, lead, nickel, etc.), radioactive substances, etc., and is the earliest and most widely used water purification material in water purifiers. Activated carbon forms a large number of microscopic pores of various shapes during the activation process, which has a strong adsorption effect.

2. Sewage treatment: The environmental protection industry is used for sewage treatment, waste gas and harmful gas treatment, gas purification, SO2 and NOx emitted in the process of coal combustion in China are the main air pollutants, and the desulfurization and denitrification treatment effect of the modified activated carbon material is good, the investment and operation cost is low, and it is easy to recycle and other advantages that have attracted people's attention.

3. Household adsorption: Activated carbon adsorption method is the most widely used, the most mature, the safest, the most reliable and the most absorbable method. As an excellent physical and chemical adsorbent, activated carbon has attracted more and more attention.

The high-efficiency and environmentally friendly activated carbon package can adsorb all indoor harmful gas molecules such as formaldehyde, ammonia, benzene, xylene, and radon in the air, and quickly eliminate the odor of decoration.

Activated carbon is a very excellent adsorbent, which is made by using charcoal, bamboo charcoal, various husks and high-quality coal as raw materials, and processing and manufacturing a series of processes such as crushing, sieeving, catalyst activation, rinsing, drying and screening of the original vertical knowledge material through physical and chemical methods. So, let's introduce whether activated carbon is useful and the characteristics of activated carbon.

Does activated charcoal work.

High-efficiency and environmentally friendly activated carbon package can adsorb formaldehyde and other indoor harmful gases in the air, quickly eliminate decoration odors, uniformly adjust the humidity of the space, and have a good effect on indoor and outdoor areas in addition to formaldehyde.

Activated carbon has a strong "physical adsorption" and "chemical adsorption" effect, which can adsorb some organic compounds to achieve the removal effect, using this principle, we can quickly and effectively remove formaldehyde, so that the indoor air can be directly and quickly improved.

The adsorption of activated carbon is affected by the temperature, humidity and air pressure of the environment, when it is saturated or will be saturated, the ambient temperature rises or the air pressure becomes low, and the adsorbed pollutants will be released outward, and the pollutants that are temporarily adsorbed will return to the indoor air.

Features of activated charcoal:

1. Activated carbon is an internationally recognized drug expert, activated carbon masks and gas masks are made of activated carbon. This product uses the physical action of activated carbon to deodorize and detoxify; There are no chemical additives and no effect on the human body.

2. Sprays and other drugs are easy to cause secondary pollution and may damage furniture, while activated carbon is a physical adsorption, very safe, harmless to the human body, and has the effect of mildew and anti-corrosion for the home.

3. Some products advocate one-time removal (experts question, not credible), and the release of toxic gas at home is a slow process, so it is removed today, and it will taste again in a few days, and it is not low. The effective adsorption period of "Bei'ankang" activated carbon is 1 year, which is just matched with it.

4. Breathable packaging, easy to use, low activated carbon**, can be used repeatedly under scorching sun exposure, easy to preserve, and will not deteriorate for 5-10 years under sealed conditions.

5. Multi-faceted uses: fish tank water purification, preservation of ancient books and paintings, most afraid of mildew and insect bites, refrigerators, toilets, and cars can achieve the purpose of disinfection and deodorization. Activated carbon is a powerful assistant for human anti-virus, detoxification, decolorization and deodorization.

The principle of activated carbon to remove formaldehyde.

The principle of activated carbon air purification is to rely on its own developed pore structure and surface area, which can be in contact with the surrounding air to a large extent, and passively adsorb some pollutants into its own pores, so the larger the surface of the activated carbon, the more developed the pore structure, the stronger the adsorption capacity.