After steam is used to reactivate the activated carbon, dry air is used to purge the activated carbon – what is the purge temperature? !
Thread Content
Is 40 degrees enough, or should it be room temperature? How long does it take to purge? !
High temperatures are beneficial for decomposition; as for the exact temperature, it depends on the performance of the activated carbon. What is the purpose of steam purging? Aren’t you worried about it absorbing water?
Requirements for restoring the adsorption conditions of activated carbon: 1. The temperature should preferably be kept below 40°C; if adsorbing low-boiling-point components, it is best to keep it below 30°C. 2. The moisture content needs to be reduced. Water competes with organic substances, significantly reducing the adsorption capacity of activated carbon. Due to the different types of carbon canisters and their varying capacities, the purging time cannot be generalized. Install a temperature sensor inside the carbon canister, then purge it until it reaches room temperature.
Won’t it get oxidized if I blow it with air after using steam at over 100 degrees?
Activated carbon is primarily composed of elemental carbon, lacks volatile components, and remains stable at 100°C. You can find a safe place to give it a try; activated carbon that has not absorbed organic substances is very difficult to light even with a lighter.
This post was last edited by nesmto on 2017-8-11 08:56. Activated carbon is primarily composed of elemental carbon and lacks volatile components; it remains stable at 100°C. You can find a safe place to give it a try; activated carbon that has not absorbed organic substances is very difficult to light even with a lighter.
Ignition temperature and oxidation are two different concepts
They are two different concepts. The technicians at the activated carbon factory use this method to demonstrate the stability of activated carbon. For small amounts of activated carbon, one desorption technique involves placing it beneath a rotary furnace and using thermal radiation to heat the activated carbon to 100–200 degrees Celsius; this process takes place in air, and no significant oxidation of the activated carbon was observed
When using steam for direct desorption, won’t the activated carbon absorb water?