FIND

Comparison with Activated Charcoal

Catalyst Activated charcoal adsorption
Reaction Oxidation/reduction cycle Adsorption
(2 O3 + C → CO2 + 2 O2)
Activated charcoal is gradually
consumed and reduced into fines
Treatment efficiency ≧99% ≧99%
Allowable O3 concentration Several tens of thousands of ppm Several tens of ppm
GHSV 10,000 h-1 3,000 h-1
Running cost Low High
Replacement
frequency/life expectancy
1 year or more (due to catalyst poison) Several month to 1 year
Replacement work Easy Difficult (due to dusting)
Amount of disposal waste Low High
Combustibility, explosion risk None (inorganic matter) Possible

For inquiries:

Department Environmental Catalyst Div.
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