Whilst various mechanisms (e.g. chemical, mechanical, thermal) of catalyst deactivation can be observed, fouling is one of the most frequent types of catalyst decay.
Yize izindlela ezahlukene (isibonelo, amakhemikhali, ama mechanical, ezishisayo) zokususa ukuguquka kungabonwa, ukuhlanjululwa kungenye yezinhlobo ezivame kakhulu zokubola kwe-catalyst.