Activated Carbon Chemical Filters

Activated carbon filters (also known as chemical filters) address gaseous pollutants that conventional particulate filters cannot capture, providing molecular-level adsorption and chemical reaction removal mechanisms. Chemical filter target contaminants include volatile organic compounds (VOCs, toluene, formaldehyde), acidic gases (HCl, SO₂, H₂S, NOₓ, HF), alkaline gases (NH₃, amines), ozone, and malodorous molecules.

Three main media structures are available: Honeycomb type with activated carbon impregnated into honeycomb substrate — low pressure drop, suited for high-airflow systems; Granular Bed type with activated carbon granules packed in a housing — high adsorption capacity for high-concentration applications; Chemical Impregnated type with specific chemical agents for targeted acid/alkali gas removal via chemical bonding. Frame designs include V-Bank (4V / 6V multi-V configuration) for low pressure drop, deep-pleat for high dust load, and panel type, classified by cleanroom airflow position into MAU (Make-Up Air, fresh air intake) and RC (Recirculation, return air loop) application types. Key selection factors are target pollutant type and concentration, carbon content, adsorption capacity, and breakthrough curves.

Typical applications: AMC (Airborne Molecular Contamination) control in semiconductor photolithography areas, laboratory fume hood exhaust, solvent gas treatment in pharmaceutical facilities, hospital pathology departments, odor control at wastewater treatment plants, and pre-treatment exhaust in printing and coating facilities.