Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating

Plastic pollution compromises the environment and human well-being, a global transition to circular economy of plastics is vital address this challenge. Pyrolysis key technology for end-of-life recycling plastics, although high energy consumption limits economic feasibility process. Various research has shown that application induction heating in biomass pyrolysis reduces when compared conventional heating. Nevertheless, potential plastic rarely explored. This paper presents an exploratory study on thermal catalytic high-density polyethylene, low-density polypropylene fixed bed reactor through An MFI-type HZSM-5 zeolite (SiO2/Al2O3 = 23) FAU-type spent fluid cracking (FCC) catalyst with distinctive Brønsted acidity textural properties were used. A complete conversion feedstocks was achieved within 10 min, even without catalyst. Thermal produced wax (72.4–73.9 wt%) gas products, indicating limited degree polymer cracking. Catalytic over FCC significantly improved cracking, leading higher (up 75.2 liquid product 35.9 yields at expense yield 25.4 wt%). In general, products rich C3 C4 compounds. The composition highly dependent properties, example, aromatics, while alkenes products. played essential role short reaction time. demonstrated fast, energy-efficient, versatile valorization based heating, where feed can be converted into wax, gas, depending end-use applications.