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چکیده
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Plastic waste gasification plays a crucial role in plastic waste management and treatment. Polyurethane foam contributed the most to global polyurethane consumption, and flexible polyurethane foam ranked first with a contribution of 31% to global polyurethane consumption. Several studies have documented plastic waste gasification. However, flexible polyurethane foam waste gasification has yet to be understood. The principal objective of this study was to evaluate the gasification process of flexible polyurethane foam waste. This study analyzed the air gasification of flexible polyurethane foam waste. It examined the effects of vital variables on the gasification performance. Lower heating value of syngas, cold gas efficiency, hydrogen to carbon monoxide ratio, exergy efficiency, and normalized carbon dioxide emission were considered as the performance indicators. In air gasification, the moisture content of flexible polyurethane foam waste, equivalence ratio, and temperature were evaluated as the key variables. The gasification performance of flexible polyurethane foam waste was comprehensively studied by considering the syngas composition changes versus the variable parameters. In the air gasification of flexible polyurethane foam waste: (1) The hydrogen to carbon monoxide ratio improved, the lower heating value of syngas declined, the cold gas efficiency lessened, the exergy efficiency decreased, and the normalized carbon dioxide emission increased when the moisture content of flexible polyurethane foam waste increased. (2) When the equivalence ratio increased, the hydrogen to carbon monoxide ratio remained constant, the lower heating value of the syngas reduced, the cold gas and the exergy efficiencies declined, and the normalized carbon dioxide emission enlarged. (3) Increasing temperature resulted in decreasing the hydrogen to carbon monoxide ratio, improving the lower heating value of the syngas, enhancing the cold gas efficiency, boosting the exergy efficiency, and mitigating the normalized carbon dioxide emission.
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