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• W3170139068 endingPage "126380" @default.
• W3170139068 startingPage "126380" @default.
• W3170139068 abstract "In response to the global initiative for greenhouse gas emission reduction, the co-combustion of coal and spent pot lining (SPL) may cost-effectively minimize waste streams and environmental risks. This study aimed to quantify the emission-to-ash detoxification mechanisms of the co-combustion of SPL and pulverized coal (PC) and their kinetics, gas emission, fluorine-leaching toxicity, mineral phases, and migrations. The main reaction covered the ranges of 335–540 °C and 540–870 °C while the interactions occurred at 360–780 °C. The apparent activation energy minimized (66.99 kJ/mol) with 90% PC addition. The rising PC fraction weakened the peak intensity of NaF and strengthened that of Ca 2 F, NaAlSiO 4 , and NaAlSi 2 O 6 . The addition of PC enhanced the combustion efficiency of SPL and raised the melting temperature by capturing Na. PC exhibited a positive effect on solidifying water-soluble fluorine and stabilizing alkali and alkaline earth metals. The leaching fluorine concentrations of the co-combustion ashes were lower than did SPL mono-combustion. The main gases emitted were HF, NH 3 , NO x , CO, and CO 2 . HF was largely released at above 800 °C. Multivariate Gaussian process model-based optimization of the operational conditions also verified the gas emissions results. Our study synchronizes the utilization and detoxification of SPL though co-combustion and provides insights into an eco-friendlier life-cycle control on the waste-to-energy conversion. • Co-combustion of spent pot lining and pulverized coal was assessed for the first time. • Temperature dependency and mechanisms of interaction effects were revealed. • Fluorine migration and the changed in ash melting temperature were advantageous. • Fluorine solidification and AAEMs stabilization were synchronized to detoxify with 10% SPL. • Optimization and experiments concurred for the optimal settings for the gas emissions." @default.
• W3170139068 created "2021-06-22" @default.
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• W3170139068 date "2021-09-01" @default.
• W3170139068 modified "2023-09-30" @default.
• W3170139068 title "Emission-to-ash detoxification mechanisms of co-combustion of spent pot lining and pulverized coal" @default.
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• W3170139068 doi "https://doi.org/10.1016/j.jhazmat.2021.126380" @default.
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• W3170139068 hasPublicationYear "2021" @default.
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