Dynamic pyrolytic reaction mechanisms, pathways, and products of medical masks and infusion tubes

Thermal degradation of hazardous 3-layered COVID-19 face mask through pyrolysis: Kinetic, thermodynamic, prediction modelling using ANN and volatile product characterization

“…Using the three monomers as an example displayed in Fig. 8 , the process of intramolecular hydrogen transfer following random breaking was used to explain the pyrolysis of polypropylene in 3LFM [9] . Intermolecular hydrogen transfer, β-fracture, and intermolecular hydrogen extraction processes were all part of the pyrolysis process [65] .…”

“…The medical sector people disposed of the FM as medical waste while the ordinary people disposed of it as solid waste, implying catastrophic repercussions. Medical waste is often disposed of by landfill, incineration, or burning; however, these procedures have a number of drawbacks, including chronical occupation and pollution of the ocean and soil, as well as the release of harmful gases into the environment [7] , [8] , [9] . As a result, policy-makers must devise a secure collecting mechanism for these masks, such as establishing particular boxes in designated locations for their collection.…”

“…Xu et al. [9] used thermogravimetric infrared spectroscopy and pyrolysis-gas chromatography/mass spectrometry analyses to investigate the pyrolysis mechanisms and volatiles products of medical mask belts, mask faces, and infusion tubes. Yousef et al.…”

A Study of Copyrolysis Characteristics of Sewage Sludge and Waste Polypropylene

“…(3) Using the Taguchi method, the optimal C 5-12 /C 19+ ratio of 9.1 was obtained, which increased to 25.7 when 10% HZSM-5 was used and decreased to 2.85 in the presence of 10% activated alumina. Both catalysts promote products with a middle carbon number (C [13][14][15][16][17][18][19] ). In addition, the optimal petrochemical product (alkenes and monoaromatics) to a worthless product (polyaromatics and cyclic compounds) component ratio was 4.02, which increased to 4.33 in the presence of 10% HZSM-5…”

“…Medical bottles exhibited a better pyrolysis performance with less residues and a higher degradation rate. Xu et al investigated the pyrolysis mechanisms and volatile products of medical masks and infusion tube [13]. The main gaseous products were classified, and it provided new insights for recovering the persistent pollutants into high value-added products.…”