Synthesis and modification of ZSM-۵ zeolite catalyst for catalytic conversion of plastic to liquid fuel

Plastics are extensively utilized in daily life due to their unique properties, including lightweight, chemical resistance, and cost-effectiveness. The most common plastics include high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET) and polyvinyl chloride (PVC). Among these, polyethylene is widely used in a variety of plastic products [۱]. The excessive use of plastic materials in recent decades has led to a substantial accumulation of plastic waste in the environment. Catalytic pyrolysis is a suitable method for recycling and converting these wastes into fuel because it has high efficiency and low environmental risks compared to other methods [۲]. The catalytic pyrolysis process occurs in an oxygen-free environment, where large hydrocarbon chains are converted into smaller ones at an optimal temperature. Various zeolite catalysts have been employed to improve the product distribution in this process. The ZSM-۵ zeolite catalyst has demonstrated excellent performance in the pyrolysis process due to its favorable structural and acidic properties, including high specific surface area, special pore structure, shape selectivity, and high resistance to deactivation [۳]. In this study, the ZSM-۵ zeolite catalyst was synthesized using the hydrothermal method and subsequently improved its structural and acidic properties by incorporating an iron promoter via the wet impregnation method. The results showed that the ۱%Fe/ZSM۵ catalyst had the best activity in catalytic pyrolysis, resulting in the production of ۰.۲۱۶ grams of high-quality, wax-free liquid product. The results showed the high potential of the ۱%Fe/ZSM۵ catalyst in the conversion of plastic to quality fuel.

کلیدواژه ها:

Catalytic pyrolysis ، Plastic ، Zeolite ، Fuel