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• W2026946421 endingPage "1587" @default.
• W2026946421 startingPage "1569" @default.
• W2026946421 abstract "Abstract This work pertains to the high-temperature combustion of pulverized coal chars under oxygen-enriched atmospheres. Single char particles were burned in a drop-tube furnace, electrically-heated to 1300–1500 K, in 21%, 50% and 100% O2, in a balance of N2. Their luminous combustion histories were observed with two-color ratio pyrometry. A solution of the Planckian ratio-pyrometry equation for temperature was implemented, extending on Wien's approximation. The temperature and time histories for 45–53 µm bituminous chars experienced wide particle-to-particle disparity, and varied depending on oxygen mole fraction and furnace temperature. Average char surface temperatures increased from 1600–1800 K in air, to 2100–2300 K in 50% O2, to 2300–2400 K in 100% O2, at gas temperatures of 1300–1500 K, respectively. Combustion durations decreased from 25–45 ms in air, to 8–17 ms in 50% O2, to 6–13 in 100% O2. Thus, average particle temperatures increased by up to 45%, whereas burnout times decreased by up to 87% as combustion was progressively enriched in O2 until 100% was attained. The apparent and intrinsic reactivity of the chars burning at 1500 K gas temperature were found to increase by factors of to 8 and 35, respectively, as the oxygen mole fraction increased by a factor of five, from 21% to 100%." @default.
• W2026946421 created "2016-06-24" @default.
• W2026946421 creator A5044727802 @default.
• W2026946421 creator A5070612441 @default.
• W2026946421 date "2007-07-12" @default.
• W2026946421 modified "2023-10-18" @default.
• W2026946421 title "COMBUSTION OF COAL CHARS IN OXYGEN-ENRICHED ATMOSPHERES" @default.
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• W2026946421 doi "https://doi.org/10.1080/00102200701239272" @default.
• W2026946421 hasPublicationYear "2007" @default.
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