Revitalizing old activated carbon

Beeve

Member
Hey there, just a quick tip for you penny pinchers- like myself.

If you feel your activated carbon had lost its scrubbing power, you can re-activate it using your oven.

If you can open your can filter, without damaging it too much so you can re-fill it later, simply dump your old carbon onto a cookie sheet and bake for half hour @ 450 degrees. Do not get it too hot, you don't want to start a fire In your oven, but around the 400 degree mark is good enough to burn off the impurities that the carbon molecules have snagged. just make sure to move the carbon around periodically as you bake it, so it all gets good exposure to the heat. Than let it cool and pack it back into your can filter, and seal it.

It's an aquarium hobbyist, we used to do this to save $$. Its simple chemistry, and just as effective as new activated carbon!
Hope that helps!
 
Carbon has to be reactivated in 3 stages. First stage you dry it at 212F, second stage is high temp decomposition which is from 930-1650F. Third stage is residual gasification by an oxidizing gas (carbon dioxide or steam) at temp of 1400F.

In short, you can't do it at home.
 
Activated Carbon has an ignition point of 330 degrees Celsius, or 626 Fahrenheit. Anything above this, you run the risk of Ignition!!!
Product identification

Chemical name Activated carbon (not impregnated)
Chemical family Carbon
Chemical formula C (± 90%, ± 10% inert mineral oxides)
Application Purification of liquids and gases
CAS Registry number 7440-44-0
Classification Non-hazardous, non-carcinogenic

Identification of the hazards

Non-hazardous *
OSHA/PEL (powder) 5 mg/m³
ACGIH TLV (powder) 10 mg/m³

Physical and chemical properties

Appearance Black, solid, pellet, granular or powder
Odour Odourless
Solubility Insoluble in water
Density 0.2 to 0.75
Boiling point ± 4827°C
Melting point ± 3550°C

Fire and explosion hazards

Flash point Non-flammable
Ignition point Min. 330°C
Extinguishing media Dry chemical; water spray or foam
Unsuitable extinguishing media None known
Fire regulations In case of fire in an enclosed area wear an independent pressurised respirator. In case of lack of oxygen activated carbon may release carbon monoxide in the event of a fire.
Unusual fire and explosion hazards Avoid stationary dust and contact with ignition sources during handling. Moving dust particles bring about a low explosion risk. Contact with strongly oxidising substances such as ozone, liquid oxygen and chlorine may cause fire.
 
Carbon has to be reactivated in 3 stages. First stage you dry it at 212F, second stage is high temp decomposition which is from 930-1650F. Third stage is residual gasification by an oxidizing gas (carbon dioxide or steam) at temp of 1400F.

In short, you can't do it at home.

Yes your right you cannot do carbon activation at home BUT
you can do step one (heat to 212) which will drive off moisture and a lot of the aromatics, and extend the life.

heating above 300 is surely a recipee for disaster.
 
get a new filter you cheap bastards. the time it takes to get the carbon out and back in, the fact that you will never get it in as tightly as the factory and get air pockets, and the shear mess of a shit ton of carbon in yor house makes it completely not worth it. If you have a can filter big enough that you are even thinking about cleaning the charcoal you should be able to afford the new one. or you are doing it wrong.
 
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