Catalytic Pyrolysis of Polyethylene Terephthalate Over Desilicated Beta

Abstract

The desilication effect of Beta on the catalytic pyrolysis of polyethylene terephthalate (PET) was investigated in this study. Compared to parent Beta, desilicated Beta revealed the higher aromatics formation efficiency due to its larger pore size allowing the efficient diffusion of PET pyrolysis intermediates to the catalyst pore. Compared to the in-situ catalytic pyrolysis, ex-situ catalytic PET pyrolysis over desilicated Beta produced a larger amount of aromatics. The desilicated catalyst could be re-used without catalyst regeneration due to the small extent of catalyst deactivation.