Catalyst Deactivation During Pyrolysis Gasoline Hydrogenation

Deactivation in PyGas hydrogenation is caused by carbon laydown.  The results of in-situ TPO indicate that the residue is mostly aromatic and hydrogenated aromatic and that increasing reaction temperature increases the amount of coke deposited.  The nature of coke changes to a condensed polyaromatic type with a higher C/H ratio.