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Activated carbon has an amazing long list of applications

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jun sakura

Accurate test methods to predict activated carbon’s specific application performance are critical for activated carbon users and manufacturers to select the best carbon.activated carbon pellets canada Activated carbon has an amazing long list of applications. All carbons are not the same, you need to choose wisely. A carbon which lasts two to three times longer than a competitor carbon in a given application is more useful than a carbon which breaks through earlier. Early GAC breakthrough results in repurchase of unused carbon and change out of the spent used carbon and its disposal. The MTBE used GAC more likely than not still has a good iodine number, when the TCN has been consumed and the MTBE filled micropores are not available to provide more needed MTBE physical adsorption. Obviously, MTBE relatively lightly used carbon can be reactivated for many uses or the municipality could use this MTBE used carbon at their municipal wastewater plant. Presently municipal wastewater plants do not provide significant tertiary treatment with activated carbon, yet their effluents are well known to have deleterious organic compounds that could be removed very well with activated carbon.1

It is generally accepted that adsorption space or pores need to be 1.3 to 1.8 times larger than the adsorbing molecules volume. Thus, small molecules are best adsorbed in the smallest high adsorption energy pores. The term pore and adsorption space are used interchangeably. Physical adsorption of small molecules is a nanotechnology phenomenon. Adsorption of molecules depends on a power of three molecular distance between adsorbate and graphitic platelet, i.e. one-molecular layer away is a relative adsorption force of one, two-molecular layers the relative force is 1/8, three-molecular layers away from the GAC graphitic platelet the relative adsorption force compared to one-molecular layer is one twenty-seventh (1/27th) and three molecular layers away from graphitic platelet results in negligible physical adsorption.1 The mass ratio of adsorbate to solid becomes of significant magnification when a significant fraction of the atoms of the solid is at a surface.https://www.yrdcarbon.com/ 

Physical adsorption of solvents out of water is enhanced liquefaction, that is, the adsorbate comes out of the water in a liquid-like state in micro-pores well before it is concentrated to saturation in micro-pores. Adsorbates are concentrated in specific adsorption spaces by London force fields from graphitic platelets.5 Polarizability of adsorbates determine how well they come out of water as liquid or solids, like the physical state of the molecules in  bottles in the chemical store room. Polarizability is a direct reflection of refractive index.

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