Study on kinetics and thermsodynamics of municipal solid waste incineration fly ash in air and N2 atmospheres DOI Creative Commons

Yegui Wang,

Weifang Chen,

Na Zhao

et al.

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(5), P. e0323729 - e0323729

Published: May 14, 2025

This study attempted to investigate the thermal behavior and reaction mechanisms of municipal solid waste incineration fly ash under air N 2 . Mass loss patterns at temperatures from 30ºC 1100ºC were obtained through thermogravimetric analysis. Based on mass patterns, high temperature was divided into three stages. in Stage I (30ºC-500ºC) amounted 3.0%-6.2%. The majority concentrated II (500ºC-800ºC) III (800ºC-1100ºC). Kinetic parameters evaluated using Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), Friedman methods. By comparison, iso-conversional FWO method exhibited highest correlation coefficient with R > 0.99. Activation energy (E) values calculated via indicate that showed considerably higher hurdle (E = 171.11 kJ/mol) than 124.52 kJ/mol). difference partly attributed presence carbonation process air. In contrast, E similar 373.38 kJ/mol 382.25 Mechanistic analysis Coats-Redfern (CR) model, employing 15 kinetic functions, identified dominant one-dimensional diffusion contracting sphere for respectively. At same time, three-dimensional could best explain mechanism both Moreover, calculations thermodynamic (ΔH, ΔG, ΔS) revealed major reactions during treatment endothermic non-spontaneous, exhibiting heightened complexity. multi-stage characterization elucidates degradation varying conditions provides useful insight processes.

Language: Английский

Study on kinetics and thermsodynamics of municipal solid waste incineration fly ash in air and N2 atmospheres DOI Creative Commons

Yegui Wang,

Weifang Chen,

Na Zhao

et al.

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(5), P. e0323729 - e0323729

Published: May 14, 2025

This study attempted to investigate the thermal behavior and reaction mechanisms of municipal solid waste incineration fly ash under air N 2 . Mass loss patterns at temperatures from 30ºC 1100ºC were obtained through thermogravimetric analysis. Based on mass patterns, high temperature was divided into three stages. in Stage I (30ºC-500ºC) amounted 3.0%-6.2%. The majority concentrated II (500ºC-800ºC) III (800ºC-1100ºC). Kinetic parameters evaluated using Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), Friedman methods. By comparison, iso-conversional FWO method exhibited highest correlation coefficient with R > 0.99. Activation energy (E) values calculated via indicate that showed considerably higher hurdle (E = 171.11 kJ/mol) than 124.52 kJ/mol). difference partly attributed presence carbonation process air. In contrast, E similar 373.38 kJ/mol 382.25 Mechanistic analysis Coats-Redfern (CR) model, employing 15 kinetic functions, identified dominant one-dimensional diffusion contracting sphere for respectively. At same time, three-dimensional could best explain mechanism both Moreover, calculations thermodynamic (ΔH, ΔG, ΔS) revealed major reactions during treatment endothermic non-spontaneous, exhibiting heightened complexity. multi-stage characterization elucidates degradation varying conditions provides useful insight processes.

Language: Английский

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