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Microwave-Assisted Catalytic Pyrolysis of Waste Plastics for High-Value Resource Recovery: A Comprehensive Review
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Microwave-assisted catalytic pyrolysis offers uniform, rapid heating that reduces processing time and energy consumption compared to conventional pyrolysis, enabling efficient conversion of waste plastics into pyrolysis oil, hydrogen gas, and solid carbon. This technology presents a high-value pathway for managing the growing global plastic waste crisis by recovering usable resources rather than landfilling or incinerating plastic.
The relentless rise in global plastic consumption has intensified the challenge of managing plastic waste pollution. Current conventional recycling technologies face significant limitations in processing efficiency and environmental compatibility, hindering the effective recovery of plastic resources. Against this background, microwave pyrolysis technology has emerged as a promising solution, leveraging its dual advantages of thermal and non-thermal effects. This technology enables uniform and rapid heating, substantially reducing processing time and energy consumption. Its characteristics open new pathways for the high-value conversion of waste plastics. Through this approach, waste plastics can be efficiently transformed into valuable products such as pyrolysis oil, hydrogen gas, and solid carbon, demonstrating broad application prospects. This paper first systematically reviews the shortcomings of existing plastic pyrolysis technologies. It then delves into the operational mechanisms, process characteristics, and key influencing factors of microwave-assisted pyrolysis. Finally, it examines current challenges and issues while outlining future research directions, offering insights for the sustainable resource utilisation of waste plastics.
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This review summarizes methods for converting plastic waste into valuable products using high-temperature chemical processes like pyrolysis and plasma technology. These approaches can produce hydrogen fuel, carbon nanotubes, and other useful materials from plastic that would otherwise become pollution. Reducing plastic waste through better recycling technology is important because most microplastic pollution originates from improperly managed plastic products.
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Plastic waste is piling up faster than we can deal with it, and that's a problem since it can break down into microplastics that pollute our water, food, and even our bodies. This review rounds up cutting-edge lab techniques—like using special chemical catalysts, light, electricity, and even microwaves—that can break old plastic down and rebuild it into valuable new materials instead of letting it sit in landfills or oceans. While these methods are still being refined for large-scale use, they offer a promising path toward turning plastic trash into useful products, which could ultimately reduce the plastic pollution that threatens both the environment and human health.
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