Iodine Value, Methylene Blue Value, and CTC Value: Three Core Indicators for Activated Carbon

In activated carbon product specifications, one frequently encounters three specific indicators: Iodine Value, Methylene Blue Value, and CTC Value. What do they represent?

I. Iodine Value

The Iodine Value reflects activated carbon's adsorption capacity for small molecules (molecular weight < 500) and serves as a key indicator of micropore development. It is a crucial reference point for applications such as water treatment and gold extraction.

II. Methylene Blue Value

The Methylene Blue Value characterizes activated carbon's adsorption capacity for medium-sized molecules and is primarily related to the development of mesopores. In applications like food and wastewater decolorization, the level of the Methylene Blue Value directly determines the effectiveness of the decolorization process.

III. CTC Value (Carbon Tetrachloride Adsorption Rate)

The CTC Value measures activated carbon's adsorption capacity for organic vapors and is a vital indicator for evaluating gas-phase adsorption performance. It is typically the primary reference metric for applications such as solvent recovery and waste gas treatment.

Generally, higher values ​​for these three indicators signify stronger adsorption capacity; however, the specific choice of activated carbon should also take actual operating conditions into account.