Activated carbon is accompanied by catalytic reaction in many adsorption processes, showing the activity of catalyst. For example, activated carbon absorbs sulfur dioxide through catalytic oxidation into sulfur trioxide.
Due to the presence of specific surface oxygen-containing compounds or complexes, activated carbon has catalytic activity for a variety of reactions, such as the formation of phosgene from chlorine and carbon monoxide.
Due to the formation of complex between activated carbon and the host, the complex catalyst increases the catalytic activity. For example, the activated carbon containing palladium salt, even without the presence of copper salt catalyst, the oxidation reaction of ene can also be catalyzed, and the speed is fast and the selectivity is high.
Because activated carbon has developed fine pore structure, huge internal surface area and good heat resistance, acid resistance, alkali resistance, can be used as a catalyst carrier. For example, in organic chemistry, hydrogenation, dehydrogenation, cyclamation, isomerization and other reactions, activated carbon is an excellent catalyst for platinum, palladium.
coal based granular activated carbon
Mechanical property of activated carbon
Because activated carbon has developed fine pore structure, huge internal surface area and good heat resistance, acid resistance, alkali resistance, can be used as a catalyst carrier. For example, in organic chemistry, hydrogenation, dehydrogenation, cyclamation, isomerization and other reactions, activated carbon is an excellent catalyst for platinum, palladium.High-quality granular activated carbon must have good adsorption performance and strength.
Like powdery activated carbon, the adsorption performance of granular activated carbon depends largely on the characteristics of pore structure. The adsorption performance index can be analyzed and characterized by different methods, such as the decolorization performance of activated carbon expressed by methylene blue. Other performance indexes include iodine adsorption value, caramel decolorization rate, etc.
The pore structure characteristics and specific surface area of activated carbon are usually obtained by measuring nitrogen adsorption isotherm at low temperature with adsorption In addition, the adsorption capacity of activated carbon also has a great relationship with its internal pore structure, pore size distribution and surface chemical properties.https://www.granular-activated-carbon.com
Chemical method in addition to certain micropores, macropores, there are more mesopores (transition pores), so it is more suitable for the application of liquid phase, adsorption of larger molecules of substances, such as sugar solution has a good decolorization effect;
When purifying water quality, it can also remove the colored material well and achieve the specified chroma requirements.