Indicators of coal-based activated carbon
The main indicators of coal-based activated carbon include physical properties, chemical properties, adsorption properties and other aspects.
Physical performance indicators
Moisture content: Measures the water content in activated carbon, usually expressed as a percentage by weight.
Ash content: The ash remaining after activated carbon is burned at high temperature, reflecting the purity of activated carbon.
Strength: Including mechanical wear resistance and tear resistance, reflecting the physical strength of activated carbon.
Particle size distribution: The size distribution of activated carbon particles.
Surface density (packing density): The mass of activated carbon per unit volume.
Floating rate: The floating ratio of activated carbon in water.
Ignition point: The temperature at which activated carbon begins to burn.
Volatile content: The content of volatile substances in activated carbon.
Chemical performance indicators
Ash content: Including surface ash and intrinsic ash, reflecting the chemical purity of activated carbon.
Heavy metal content: such as the content of heavy metals such as iron, zinc, lead, and arsenic to ensure the safety of activated carbon. PH value: reflects the acid-base properties of activated carbon. Adsorption performance index Iodine value: indicates the adsorption capacity of activated carbon for small molecules, and is usually used to characterize the degree of development of activated carbon micropores. The unit of iodine value is mg/g24. Methylene blue value: indicates the number of mesopores of activated carbon, and is often used to characterize the decolorization ability of activated carbon. The higher the methylene blue value, the stronger the decolorization ability. Carbon tetrachloride value: reflects the total pore volume of activated carbon, which is determined by measuring the saturated carbon tetrachloride gas flow through the carbon bed. Molasses value: measures the decolorization ability of activated carbon in boiling molasses solution, and is often used to characterize the macroporous surface area of activated carbon. The main indicators of coal-based activated carbon include physical properties, chemical properties, adsorption properties and other aspects.