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  Activated CarbonFiber
What is ACF?
Manufacturing ACF
Manufacturing process
Form of ACF
Characteristics of ACF
Specific Surface Area
Environmental purification
Application to gas-phase     
 1. Organic solvent
 2. Odorous and cigarette
 3. NOx・SOx
Application to Liquid-phase
 1. Chloride compound
 2. Harmful heavy metal ions
 3. Removal of pigment
Environmental Purification Material
Activated Carbon Granular Non-Woven Fabric
Activated Carbon Powder Non-Woven Fabric
Filter mat for water tankNEW!
ACP filter mat
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  Activated CarbonFiber Environmental Purification Material

What is Activated CarbonFiber?

 Activated CarbonFiber (ACF) is fibriform activated carbon. ACF is made of cellulosic, PAN, phenolic, and pitch fibers, and it is new advanced material which is different from usual granular or powder activated carbon.
 ACF's diameter is approximately 5 to 30 μm which is very fine compared to granular activated carbon (grain diameter 500 to 5000 μm), and it has larger surface area. Since ACF's pore diameter is apploximately 15 to 20Åand most of pores are micro pores, the speed of adsorption and desorption is fast. Moreover, it has excellent for adsorption in low concentration. ACF doesn't fly apart like powder activated carbon(grain diameter 5 to 30 μm), and it is easy to manufacture to various forms such as paper, textile, and felt.
  ※1μm=10−6m =1/1000mm
  ※1Å=10−10m =1/10−7mm=0.1nm=100pm(Angstrom)

           Comparison between ACF and Granular activated carbon             
      ACF Granular activated carbon
Size Diameter 5 - 30 μm
Fiber form
Grain diameter
0.5~5 mm
Specific surface area
700~2500 900~1200
Outer surface area
0.2~2.0 ~0.001
Pore size (Å) Less that 20

Pore of ACF and granular activated carbon

Method for manufacturing ACF

  Manufacturing process
  The methods for manufacturing ACF differ depending on kinds of raw materials. In general, the method is similar to manufacturing fibers for clothing. Spun fibers are oxidized by heat treatment, and then they are activated after conducting not to melt.

   Example fo ACF manufacturing method
What is activation?
  Activation is reaction process to develop pore structure of CarbonFiber material. By this
   process, CarbonFiber is able to have fine pores. Thus, activation carries out CarbonFiber
   to have larger surface area and high functions such as absorption, compared to usual carbide.
   In the ways of activation, there are chemical activation method and gas activation method.
   In case of ACF, gas activation method is usual method to improve fiber strength and purity.
  Raw material of ACF is high quality PAN, PITCH based CarbonFiber material. Thus, it is stable of quality and purity compared to activated carbon manufactured by coconut shell and coal.
  Form of ACF
  ACF can be various forms to bundles (tens of thousands filaments bundle), cut fiber, yarn (twisted strings), textile, non-woven (felt). Moreover, it can be used for honeycomb structure or cylindrical to make filters.

Characteristics of ACF

  Specific Surface Area of ACF
  The diameter of ACF is 5 to 30μm and it has large outer surface area which is contacting surface. Compared to granular activated carbon, the area is 200 times larger. In addition, it has lots of fine pore which is smaller than 20Å around the surface. Thus, its large surface area can effectively function, and it has faster absorption-desorption speed as well as larger adsorption capacity.

  Workability of ACF
  ACF is light and has flexible workability. Since its carbon fiber doesn't spread out,
  it is easy to change it form.

  Conductivity of ACF
  Since it is carbon material, its electric resistance is small so that high conductivity. Its specific resistance value is approximately 10-1~10Ωcm. By using this electric characteristics, it is considered to use ACF as condenser, lithium-ion battery, and electrode material.

ACF application to environment purification

 Since ACF has large outside surface area and specific surface area, it has greater adsorption ability. Due to this characteristics, it effectively works for environment purification such as gas-phase treatment (exhaust gas treatment) and liquid-phase treatment (water treatment).

Characteristics and Application of ACF

  Application to gas-phase treatment
 1. Collecting organic solvent
    Since ACF is excellent for adsorption of low concentration gas and has fast adsorption speed, it can function as an adsorbing material. It is suitable for drycleaning, metal cleaning, and collecting organic solvent such as trichloroethylene which is used to manufacture printed board, IC related to electronics.

  2. Removal of odorous gas and cigarette smoke
    Because ACF can absorb Ammonia and sulfide which are the source of bad odor quickly, it is suitable for deodorant filter.

  3. Removal of NOx・SOx
    ACF enables to conduct adsorption removal of low level of NOx and SOx which are contained in waste gas or the air. Thus, it is suitable for catalyser of waste gas or denitration systems.

  ※For gas-phase, since ACF enables to protect from germ such as novel influenza, ACF is used for masks. The mask has an effect on prevention of infectious disease. In addition, fine dust and powder dust are also absorbed by ACF, so that ACF masks can work for anti-pollen ora anti-dust. It can be also used at disaster sites.

  Application to Liquid-phase treatment
  1. Removal of chloride compound
    It can be used as water filter since ACF can remove chloride compound such as trihalomethane which is contained in tap water. ACF doesn't fly apart nor isn't damaged by pressure, so it tend not to suppress the speed of passing water.

  2. Removal of harmful heavy metal ions
    ACF enables to remove harmful heavy metal ions which are contained in waste water or source of drinking water. With regard to waste water treatment, it is suitable to remove harmful matters which are not be removed by biological treatment nor coagulation settling treatment. Moreover, it can remove harmful heavy metal such as cadmium, lead, aresevic, and manganese which are eluted from mines.  

  3. Removal of pigment
    Pigment waste water which are not treated by coagulation settling treatment can enable to be removed by ACF.

  ※For liquid-phase, microorganisms quickly attach to ACF since ACF has small electric resistance. Moreover, because it is based on carbon, it has high bioaffinity. Thus, it is suitable for carrier for biological treatment or electrode for microbial fuel cell.

Activated CarbonFiber Environmental Purification Material

  Activated Carbon Fiber Non-Woven Fabric
   ACF is processed as non-woven fabric. Due to its large outer surface area and specific surface area, it can absorb various matters.

   MiraCarbon ACFNW-EM 1(t=1mm)
   MiraCarbon ACFNW-EM 2(t=2mm)
   MiraCarbon ACFNW-EM 3(t=3mm)
   MiraCarbon ACFNW-EM 4(t=4mm)
   MiraCarbon ACFNW-EM 5(t=5mm)

Information for Activated CarbonFiber non-woven fabric products


  Activated Carbon Granular Non-Woven Fabric
  Activated Carbon Powder Non-Woven Fabric
  Activated CarbonFiber mask
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