Activated carbon fiber

Compared to granular activated carbon, adsorption and desorption speeds of Kynol ACF (Activated Carbon Fiber) are very fast. It has a high level of purity and a large specific surface area that other activated carbons do not have.

Typical characteristics

Typical characteristics of Kynol Activated carbon fiber

Fiber diameter 10〜30um
Specific Surface Area 1,000〜2,500m²・g¯¹
Pore diameter 0.5~1 nm
Elongation 300〜400 N・mm¯²
Toluene Adsorption 30〜80 wt%

Typical Properties of Activated Carbon Fibers




(Standard Type)


(Standard Type)


(Coconut shell type)

Diameter(um) 10~30 15〜20 6〜8
Specific Surface Area (m²・g¯¹) 1,000〜2,500 1400 900 800
Surface area (m²・g¯¹) 1.0〜1.2 0.2〜0.7 1.5〜2.0 0.001〜0.1
Pore diameter(nm) 0.5~1 0.5~2 1~5 0.7〜2
Tensile strength (N・mm¯²) 300〜400 50〜100 250~350
Modulus (N・mm¯²) 10,000〜15,000 70,000〜80,000
Toluene adsorption (wt%) 30〜80 30〜60 20〜45 30〜35
Methylene blue adsorption capacity (cm³・g¯¹) 310〜380 100〜150 70〜80

Specific Surface Area and Tensile Strength of Activated Carbon Fibers(Compared by precursor)

When activated into ACF, a countless number of micropores are generated which decrease fiber strength.
However, among various existing ACF, Kynol ACF has the highest fiber strength.

Activated Carbon Fiber SEM

Activated Carbon Fiber, Pore distribution

After carbonization and further steam activation, microscopic holes are made on the surface of carbon fibers to form activated carbon. The characteristic of fibrous activated carbon is that it has an ultra-high specific surface area of about 2,000~2,500 m²/g, a level that cannot be reached by ordinary materials.

Iodine Adsorption(ACF)

Toluen Adsorption(ACF)

Compared to granular activated carbon, Kynol ACF has a very high adsorption rate and excellent selective adsorption properties. In addition to adsorption, the speed of desorption of adsorbed materials is also extremely fast.