(183e) Targeting Fuel-Ranged Aromatics through Co-Pyrolysis of Polystyrene and Polyethylene with H-ZSM5
AIChE Annual Meeting
Monday, November 8, 2021 - 5:10pm to 5:35pm
Experiments were carried out with the three independent variables: the presence of catalyst, catalyst acidity and catalyst ratio. H-ZSM5 used in this work varied in three silica to alumina ratios, 30, 80 and 280, corresponding to the acidities of each catalyst. PS and PE were tested individually and as a mixture (1:1 mass ratio) with and without the presence of H-ZSM5. Simulated cracking using thermogravimetric analysis (TGA) showed that the catalytic cracking had reduced the required temperature from 490 °C of non-catalytic cracking to 340 °C, for almost total conversion. Online Fourier-transform infrared spectroscopy (FTIR) of the flue gas from TG furnace showed that production of aromatics increased with the addition of PS in PE. For the products PS and mixed plastic samples, in the FTIR spectra, a peak at 700 cm-1, attributing to benzene and derivatives, was found. This particular peak was absent in the PE products. The mass spectroscopy analysis of fixed bed reactor showed a more diversified aromatics produced from co-upcycling of PE and PS.