VOC Adsorption

VOCs are carbon-based chemicals that readily evaporate at room temperature. Common examples include benzene, toluene, xylene, formaldehyde, acetone, and a wide range of solvents. Their release contributes to tropospheric ozone formation, smog, and human exposure risks such as respiratory issues and carcinogenicity. Regulatory pressures globally (e.g., EPA, EU Directives) have driven the adoption of efficient control technologies, with activated carbon adsorption being a cornerstone solution due to its versatility and efficiency.

The activated carbon adsorption process is mainly suitable for treating volatile organic compounds (VOCs) generated during the production process, especially in industries such as furniture manufacturing and metal surface treatment that use volatile coatings. The characteristics of these industries are discontinuous production time, low exhaust gas volume (generally less than 30000m³/h), and low import concentration of volatile organic compounds (generally around 300mg/m³, not exceeding 600mg/m³). Therefore, enterprises with the above characteristics can effectively treat organic waste gas through activated carbon adsorption technology. Activated carbon adsorption technology can effectively remove the organic waste gas generated during the coating volatilization process, improve the waste gas treatment effect, and reduce environmental pollution.

VOC removal by activated carbon primarily occurs through physical adsorption (physisorption), where VOC molecules are attracted and bound to the extensive internal surface area of carbon pores via weak van der Waals forces. This reversible process allows for the regeneration of spent carbon. Factors influencing adsorption efficiency include:

•Surface Area & Porosity: High specific surface area (500-1500m²/g) and tailored pore size distribution (microporous: <2 nm, mesoporous: 2-50 nm) are critical.

• VOC Properties: Molecular weight, polarity, boiling point, and concentration.

• Process Conditions: Temperature, humidity, gas flow rate, and inlet concentration.

• High removal efficiency (typically >90-95% for well-designed systems).

• Broad spectrum applicability across diverse VOCs.

• Capability to handle fluctuating concentrations and flow rates.

• Potential for resource recovery (solvents).

• Relatively low operational cost compared to incineration or advanced oxidation.

 

Pellet Activated Carbon： HNC series

Product Description

Engineered specifically for volatile organic compound control, this cylindrical (pelletized) activated carbon delivers superior performance in industrial air purification and solvent recovery systems. Its uniform shape ensures optimal gas flow with minimal pressure drop, while the robust mechanical structure withstands repeated adsorption and regeneration cycles. Featuring a tailored pore structure with high surface area, it effectively captures a wide range of VOCs, from small aromatic molecules to larger solvents. Ideal for fixed-bed applications where efficiency, durability, and cost-effectiveness are critical.