Adsorption mechanism and technical parameters
Working principle
Physical adsorption: Relying on a specific surface area of 500-1500㎡/g, it captures small molecular VOCs (such as benzene and formaldehyde) through micropores (<2nm)
Chemical adsorption: Surface carboxyl and phenolic hydroxyl groups combine with polar pollutants (such as ethyl acetate)
Catalytic oxidation: Modified carbon loaded with MnO₂ or CuO can convert ozone into OH radicals and decompose difficult-to-adsorb organic matter
Industry application cases
Case 1: VOCs treatment in automobile painting workshop
Exhaust gas parameters:
Air volume 50000m³/h, benzene concentration 200mg/m³, humidity RH70%
System configuration:
Honeycomb activated carbon module: pore density 100CPI, thickness 400mm×2 layers
Steam desorption system: 0.3MPa saturated steam, desorption rate＞92%
Operation effect:
Emission concentration＜20mg/m³, annual solvent recovery 12 tons (value ￥360,000 yuan)
Case Example 2: Treatment of isopropyl alcohol waste gas in an electronics factory
Challenges:
Intermittent emissions (concentration fluctuations of 50-800 mg/m³), containing siloxane impurities
Solutions:
Silane pretreatment tower (siloxane removal > 95%)
Columnar activated carbon (iodine value 1100 mg/g) adsorption tank
Nitrogen protection regeneration system (oxygen content < 5%)
Results:
Emission compliance rate 100%, activated carbon replacement cycle extended to 18 months
Case 3: H₂S odor control in a chemical plant
Working conditions:
Containing H₂S 500ppm, temperature 40-60℃, oil mist
Technical solution:
Pre-electrostatic dust removal (oil mist removal rate > 99%)
Oxidation modified activated carbon (load 5% Fe₂O₃)
Two-stage series adsorption (contact time 2.5 seconds)
Results:
H₂S removal rate > 99.5%, outlet concentration < 5ppm
For more information about the application of edible oil purification, please use our contact form to request more information.
