Activated Carbon Fiber Felt

 

Activated Carbon Fiber Felt is a high-efficiency adsorption material made of artificial fiber through special processes such as impregnation with flame retardant, low-temperature carbonization, high-temperature carbonization, and high-temperature activation. It is also the most environmentally friendly adsorption material with the strongest adsorption capacity in the contemporary era. Its main component is carbon element, which exists in the form of chaotic stacking of graphite-like microchips, and the micropores are in a “V” shape. Compared with traditional granular activated carbon, it is easier to adsorb and desorb. The product has abundant micropores and high specific surface area, is acid-resistant and alkali-resistant, has low ash content, and has good electrical conductivity and chemical stability; the product not only has excellent adsorption performance, but also has good reduction ability, fast adsorption and desorption speed, and can be reused many times. It is mainly used in organic solvent recovery, air purification, sewage treatment, medical care, precious metal adsorption, protective clothing, electronics and energy fields, and corrosion-resistant and high-temperature resistant places.

 

1. Performance:

① Large adsorption capacity: The adsorption capacity of organic gases and odorous substances (such as n-butyl mercaptan, etc.) is several to dozens of times greater than that of granular activated carbon (GAC). It also has good adsorption capacity for inorganic gases. The adsorption capacity of inorganic substances, dyes, organic substances and precious metal ions in aqueous solution is 5-6 times higher than that of GAC. It has excellent adsorption capacity for microorganisms and bacteria (such as the adsorption rate of Escherichia coli can reach 94-99%). It has particularly good adsorption capacity for low-concentration adsorbents. For example, it still maintains a high adsorption capacity for PPM-level adsorbents, while adsorption materials such as GAC often have greatly reduced adsorption capacity at low concentrations.

② Fast adsorption rate: The adsorption rate of gas is very fast, and the adsorption of liquid can also quickly reach adsorption equilibrium. Its adsorption rate is 2-3 orders of magnitude higher than that of GAC.

③ Easy to regenerate and fast desorption rate. In the process of multiple adsorption and desorption, the original adsorption performance is still maintained. For example, ACF can be completely desorbed by treating it with 120-150℃ hot air or water vapor for 10-30 minutes.

④ Good heat resistance, high temperature resistance of more than 1000℃ in inert gas, and ignition point of more than 500℃ in air.

⑤ Acid and alkali resistant, with good electrical conductivity and chemical stability.

⑥ Low ash content.

⑦ Good formability, easy to process into felt, silk, cloth, paper, etc.

 

1. Applications

 

① Solvent recovery: can absorb and recover benzene, ketones, esters, and petroleum;

② Air purification: can absorb and filter odor, body odor, smoke, poison gas, O3, SO2, NO, etc. in the air;

③ Water purification: can remove heavy metal ions, carcinogens, odor, moldy smell, bacteria and decolorization in water; can be used for tap water, food industry water and industrial pure water treatment;

④ Environmental protection engineering: waste gas and sewage treatment;

⑤ Protective masks, chemical protective clothing, cigarette filters, etc.;

⑥ Precious metal extraction or recovery, adsorption of radioactive substances, can also be used as catalyst carrier, gas chromatography stationary phase;

⑦ Used in medicine for bandages, women’s products, acute antidotes, artificial kidneys, etc.;

⑧ Applications in electronics and energy, such as high-capacity capacitors, batteries, etc.;

⑨ High temperature resistant and thermal insulation materials.

 

3. Basic Principles of Industrial Organic Waste Gas Treatment by Adsorption

Due to the presence of unbalanced and unsaturated molecular attraction or chemical bond force on the solid surface, when the solid surface comes into contact with gas, it can attract gas molecules, concentrate them and keep them on the solid surface. This phenomenon is called adsorption. By utilizing the adsorption capacity of the solid surface, the waste gas is brought into contact with porous solid substances with a large surface area, and the pollutants in the waste gas are adsorbed on the solid surface, so that they are separated from the gas mixture to achieve the purpose of purification.

 

4. Types of Organic Matter that can be Adsorbed and Recovered by the Waste Gas Adsorption Recovery Device

Hydrocarbons: benzene, toluene, xylene, naphtha, protective film volatile oil, cyclohexane, thinner, etc.

Halocarbons: trichloroethylene, perchloroethylene, trichloroethane, dichloromethane, trichlorobenzene, trichloromethane, carbon tetrachloride, freon, etc.

Ketones: acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.

Esters: ethyl acetate, butyl acetate, methylcyclohexane, etc.

Ethers: ethyl oleate, dioxane, tetrahydrofuran, furfural, methyl cellosolve, etc.

Alcohols: methanol, ethanol, isopropanol, butanol, etc.

Monomolecular objects for polymerization: vinyl chloride, acrylic acid, acrylate, styrene, vinyl acetate, etc.

 

5. ACF Adsorption Capacity for Different Organic Substances

 

The adsorption saturation capacity of ACF with a specific surface area of ​​1300m²/g for different organic substances at room temperature is shown in the table below

 

Serial Number	Items	Unit	Data	Test Method
1	Single Fiber Diameter	denier	10-20
2	Bulk Density	g/cm³	0．04-0．10
3	Ignition Point	°C	》500	ASTM D3466
4	Specific Surface Area	m²/g	800-2000	BET
5	Pore Volume	cm³/g	0．6-1．23	Single Point Adsorption
6	PH	PH	5．6-7．0	GB/T12496*20-90
7	Ash Content	%	≤1.5	GB/T12496*11-90
8	Benzene absorption rate	%	35-70	Jisk1474-91

 

1. Technical Parameters of Viscose Based Activated Carbon Fiber

 

Item	Name	Adsorption Saturation
1	Benzene	43
2	Toluene	37.6
3	Xylene	34
4	Methanol	34.8
5	Ethanol	37.3
6	Butanol	33
7	Formaldehyde	23.3
8	Acetone	37.5
9	Methylene Chloride	64.3
10	Ethylene Dichloride	56.9
11	Styrene	27
12	Ethyl Acetate	40.7
13	Carbon Tetrachloride	47．1
14	Isopropyl Alcohol	35．6
15	Butanone	34．4
16	Trimethylamine	34．9
17	Mercaptoethanol	34．8
18	Hydrogen Chloride	45
19	93# Gasoline	39