CTC adsorption rate determination is usually carried out by standardized methods (e.g. ASTM D3467), where the amount of adsorbed CTC vapor is measured by adsorption of CTC vapor by activated carbon at a specific temperature and air flow. Experimental conditions are strictly controlled to ensure accuracy and comparability of results.

The CTC adsorption rate is one of the key indicators for evaluating the performance of activated carbon, and its key role in practical applications is described below:

• Measurement of adsorption capacity: A higher adsorption rate of CTC means that the activated carbon has a more developed microporous structure and a higher adsorption performance, and is the main basis for selecting an efficient product.
• Solvent recoveryActivated carbon with a high adsorption rate of CTC is capable of adsorbing and storing more organic solvent vapor, thus improving recovery efficiency.
• Air purification: Activated carbon with a high adsorption rate of CTC can effectively remove volatile organic compounds from exhaust gases.
• Industrial applicationsActivated carbon is used for adsorption and purification processes in the chemical, pharmaceutical and food industries. The adsorption level of CTC determines the effectiveness of activated carbon in the treatment of exhaust gases and the separation of impurities.

The selection of the appropriate activated carbon product depends on the specific application scenario:

• For scenarios requiring high adsorption efficiency (e.g. solvent recovery), products with CTC ≥ 70% are recommended.
• For low concentration of pollutants (e.g. general air purification), products with CTC 50%-60% can meet the demand.

CTC is an important indicator of the performance of activated carbon products as it determines their adsorption efficiency and effectiveness in different applications. Selecting products with an appropriate CTC can effectively improve purification efficiency.