Solid fuels flameless combustion

Saha, M.; Dally, Bassam B.

doi:10.1016/b978-0-323-85244-9.00016-2

Cited by 3 publications

(2 citation statements)

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“…Compared with gaseous fuels (i.e., CH 4 , H 2 , and NH 3 ), the mobility and reactivity of solid fuels (i.e., pulverized coal and biomass) are worse. Increasing jet velocity or preheated temperature are common ways to realized solid fuel MILD combustion . Saha et al reported the effect of different jet velocities of fuel on pulverized coal MILD combustion.…”

Section: Introductionmentioning

confidence: 99%

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Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

et al. 2022

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Cocombustion technology of pulverized coal blending with NH 3 has a promising use in large-scale CO 2 reduced emission. However, the unstable flame and high NOx emissions during the cocombustion process retard its wide application. In order to overcome these limits, a new scheme of advanced moderate or intense low-oxygen dilution (MILD) combustion technology implemented in pulverized coal/NH 3 cocombustion is proposed in this work, and a numerical study on cocombustion characteristics of pulverized coal blending with different NH 3 proportions (0% ∼ 50% NH 3 , by caloric) is performed. Results show that the achievement of a pulverized coal/NH 3 MILD combustion regime is preferred at a high NH 3 case. As NH 3 proportions increase from 0 to 50%, the furnace temperatures are decreased due to the enhancement of heat transfer between flue gas and the furnace wall. The ignition time and temperature of coal particles are decreased by 52.1 and 33.0%, respectively, while the particle burnout time is prolonged by 52.3% and the char consumption rate decreases linearly. In addition, MILD combustion shows a good potential to reduce NOx conversion during pulverized coal/NH 3 cofiring. Although the proportion of NH 3 reaches up to 50%, NOx conversion ratio is only 2.1%. These results are expected to provide several new insights into stable flame and low NOx emissions of pulverized coal/NH 3 cocombustion.

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Section: Introductionmentioning

confidence: 99%

“…Increasing jet velocity or preheated temperature are common ways to realized solid fuel MILD combustion. 31 Saha et al 32 reported the effect of different jet velocities of fuel on pulverized coal MILD combustion. Both low NOx and CO emissions could be realized at high velocity.…”

Section: Introductionmentioning

confidence: 99%