Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 461, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2023.132672
Keywords
Polyethylene; Aromatics; Pressurized catalytic pyrolysis; Pyrolysis activity; Catalysis stability
Categories
Ask authors/readers for more resources
A pulse pressurized catalytic pyrolysis process was developed to convert waste plastic into high-value compounds. The results showed that pressurization improved the pyrolysis activity and catalysis stability.
To address the challenging issues of waste plastic pollution and petroleum shortage, we report herein a pulse pressurized catalytic pyrolysis process where polyethylene is continuously converted into aromatics using HZSM-5 catalyst incorporated with hydrated SiO2. Pressurization improves the activity of single-pulse pyrolysis of polyethylene by 14.42%. In contrast to the linear decrease of BTEXS relative yield with a K value of -0.23 under non-pressurized conditions, pressurization results in a notable stability in the latter stage, characterized by a K value of only -0.063. Comprehensive catalyst characterization demonstrates that pressurization promotes the release of water from hydrated SiO2, enabling HZSM-5 to effectively undergo dealumination and obtain suitable acidity and pore structure, and ultimately enhancing the resistance to carbon deposition. In summary, pres-surization improves both pyrolysis activity and catalysis stability, offering a promising strategy for the high-value utilization of waste plastics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available