Production of high-octane gasoline through catalytic pyrolysis of plastic waste in a fixed-bed reactor loaded with MIL-۵۳(Cu)/Y zeolite nanocatalyst

With the rapid development of industry, the use of plastics has expanded dramatically due to their unique properties such as lightweight, low cost, accessibility, and flexibility. Conversely, the accumulation of plastic waste in nature has become a global environmental crisis. Among various proposed plastic recycling methods, catalytic pyrolysis stands out as an efficient approach that can reduce the degradation time of waste from ۳۰۰ years in nature to just ۳۰ minutes in a reactor. In this study, Y zeolite and MIL-۵۳(Cu) were separately synthesized via hydrothermal autoclave reactions, followed by ultrasonic-assisted impregnation. The catalysts were characterized using XRD, BET, BJH, SEM, XRF, EDX, TPD-NH۳ and FTIR techniques. Variations in zeolite synthesis time induced significant changes in support crystallinity, yielding amorphous, paracrystalline, and crystalline phases. Loading each catalyst variant into the reactor produced gasoline with distinct octane numbers (۴۰۰–۵۰۰ °C operational range). The crystalline-catalyst-derived gasoline was found to exhibit an octane number compliant with premium-grade (super) gasoline specifications. GC-MS analysis confirmed close compositional alignment between the light hydrocarbon products and conventional gasoline, as evidenced by carbon-number distribution (C۵–C۱۲) range and composition.

کلیدواژه ها:

Waste Plastic ، Pyrolysis ، Nano Catalyst ، Octane Number