Granular activated carbon is often used to adsorb molecules. The adsorbability of granular activated carbon determines the applicability, and the adsorbability is related to the pore size distribution of various carbon types. coal activated carbon supplier Take water vapor activated peat-based, lignite-based and coconut shell-based powdered activated carbon as an example: peat-based activated carbon has micropores and mesopores, and granular activated carbon can be used for a variety of applications; lignite-based carbon has more mesopores and particles Activated carbon also has large mesopores, which provides excellent penetration; coconut shell-based granular activated carbon is mainly micropores, which is only suitable for the removal of low molecules.
The granular activated carbon activated by chemicals is very porous, mostly in the range of micropores and mesopores. However, the pore surface of activated carbon activated by water vapor and activated carbon by chemicals is less hydrophobic and more negatively charged.
Take extruded and crushed granular activated carbon as examples: peat-based extruded activated carbon can be made into varieties with different pore size distributions. The microporous granular activated carbon is mainly used for gold recovery in gas phase applications. The varieties with both micropores and mesopores are mostly used in liquid phase applications, such as the adsorption of small and large molecules in water purification.
Broken coal-based granular activated carbon has both micropores and mesopores, and can be used for multiple purposes. Lignite-based or coconut-shell-based granular activated carbon has the same micropore and mesopore structure as powdered carbon.
The technical indicators of activated carbon are very important: the performance indicators of activated carbon products can be divided into physical performance indicators, activated carbon chemical performance indicators, and granular activated carbon adsorption performance indicators. Three performance indicators play a very important role in the selection and application of activated carbon. The main physical performance indicators of activated carbon include: shape, appearance, specific surface area, pore volume, specific gravity, mesh number, particle size, abrasion resistance, floating rate, etc.
The main chemical performance indicators of granular activated carbon are: PH value, ash content, moisture, ignition point, uncarbonized compound, sulfide, chloride, cyanide, sulfate, acid soluble matter, alcohol soluble matter, iron content, zinc content, lead content, arsenic Content, calcium and magnesium content, heavy metal content, phosphate, etc. The main adsorption performance indicators of activated carbon are: methylene blue adsorption value, iodine adsorption value, phenol adsorption value, carbon tetrachloride adsorption value, caramel adsorption value, quinine sulfate adsorption value, saturated sulfur capacity, breakthrough sulfur capacity, water capacity , Chloroethane vapor protection time, ABS value, etc.
