Carbonisation means the conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis. Indirectly heated rotary kilns, which are hermetically sealed, are used for this process.
Carbonisation is a special type of pyrolysis with the target in obtaining a maximum of solid products. All applications, which are described in the chapter "Pyrolysis", are possible. The most common application is the carbonisation of lignite to coke, which can be fired in households without causing pollution.
2.2 Active Coal
Active coal activating is a special form of carbonisation. Here the adsorped volatiles are forced out by heat. The temperature, which is to choose for the thermal process, depends on the kind of adsorped volatiles.
Active coal generation is also possible by indirectly heated rotary kilns. Nearly all carbon rich raw materials can be taken.
The character of the active coal depends on the raw material as well as on the process parameters.