摘要
The escalating generation of medical waste, characterized by complex composition and high chlorine content, poses severe challenges for its clean treatment. Pyrolysis offers a promising route for thermochemical conversion of medical waste into high-value products, achieving sustainable treatment of medical waste. However, a limited understanding of how pyrolysis parameters influence product formation and chlorine transformation restricts its practical application. This study investigated the influence of temperature (500–700 ℃) and heating rate (60–6000 ℃/min) on medical waste pyrolysis for sustainable high-value products. For product formation, temperature primarily governed bond cleavage and secondary cracking, thereby enhancing syngas production (H 2 , CH 4 , CO) and promoting decomposition of oxygenated polymers and plasticizers. In contrast, heating rate mainly controlled volatile residence time, with rapid heating suppressing secondary reactions, preserving bis(2-ethylhexyl) phthalate and aromatic intermediates in tar. The char structure became more graphitic with increasing temperature and heating rate. For chlorine transformation, increasing temperature facilitated C-Cl bond cleavage, directing the majority of chlorine into the gas phase predominantly as inorganic HCl, a readily removable chlorine species in downstream treatment. Conversely, fast heating redirected chlorine toward condensed phases, mainly fixing it as NH 4 Cl in tar and as metal chlorides (KCl, NaCl) in char. The formation of representative organochlorines, including 3-(chloromethyl)heptane and 1-chloroethylbenzene, was selectively regulated by temperature and heating rate, respectively. Overall, this study establishes a framework for simultaneously optimizing product formation and steering chlorine toward easily removable inorganic species, supporting the sustainable thermochemical treatment of medical waste.
危险品化学品经营许可证（带存储）