Rapid infrared co-pyrolysis performance of corn stover and polyurethane foam waste for upgrading oil yield and quality

Shuai Li, Erfeng Hu, Guangwen Xu, Zuohua Liu, Yongfu Zeng, Jianglong Yu, Guocan Zheng, Dean Pan, Moshan Li and Youcai Ma

Energy, 2025, vol. 333, issue C

Abstract: Rapid infrared heating has been proved efficient for investigating co-pyrolysis synergy by eliminating temperature gradients. This study investigated the co-pyrolysis behaviors and synergistic effects of polyurethane foam (PUF) and corn stover (CS) at various temperatures and blending ratios in an infrared heating reactor. Thermogravimetric analysis (TGA) and iso-conversional methods revealed that the inclusion of CS in PUF pyrolysis reduced the activation energy and promoted synergy across a wide range of temperatures and compositions. The Criado method showed that the co-pyrolysis mechanism corresponded to the Fn reaction model. The experimental results indicated that the oil yield exhibited a trend of initial increase followed by a decrease, peaking at 36.97 % at 600 °C. During the co-pyrolysis process with a 15 % CS ratio, the oil yield exhibited a maximum positive synergistic effect of 2.35 % and CO2 yield displayed a minimal yield of 17.61 %. GC-MS results demonstrated that co-pyrolyzing CS with PUF significantly reduced nitrogenous compounds in the oil, with a 21.19 % reduction observed when the CS ratio exceeded 10 %. FTIR analysis indicated that higher temperatures favored the breakdown of aromatic and aliphatic structures. These findings implied that the co-pyrolysis of PUF and CS under infrared heating not only enhanced oil yield and fuel quality but also offered a promising pathway for the sustainable disposal of plastic and agricultural waste. This approach can contribute to cleaner bio-oil production and more efficient waste-to-energy conversion technologies.

Keywords: Synergetic effects; Artificial neural network (ANN); Criado method; Bio-oil quality; Kinetics (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:333:y:2025:i:c:s0360544225029007

DOI: 10.1016/j.energy.2025.137258

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