Activated charcoal.
Activated charcoal mainly contains carbon in the form of microcrystalline graphite, which has been processed in order to obtain a porous material with a large internal surface area.
These characteristics allow it to retain a lot of substances by trapping their molecules and absorbing them in its internal structure.
Zeolite.
Zeolite is a mineral characterised by a high absorption capacity of organic compounds and water vapour.
This characteristic is the direct consequence of its microporous crystalline structure.
Moreover, owing to its chemical features, zeolite releases heat when it comes into contact with moisture, thus reducing it.
The use of zeolite is therefore very important to reduce odours, as well as to absorb steam produced by cooking.