Indicators of ignition for clouds of pulverized coal

Wall, Terry; Phong-anant, D.; Gururajan, V.S.; Wibberley, L. J.; Tate, A.G.; Lucas, John

doi:10.1016/0010-2180(88)90112-5

Cited by 37 publications

(16 citation statements)

References 5 publications

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“…To date, a number of experimental techniques have been employed to study the ignition behaviour of solid fuels, such as the pulse ignition technique [17], continuous flow ignition [18] and thermogravimetric ignition [19]. In this study, a thermogravimetric ignition technique was adopted for the ignition temperature measurement, as it is being widely used by many researchers.…”

Section: Ignition Temperature Of the Torrefied Biomass In A Tgamentioning

confidence: 99%

Experimental Study on Dry Torrefaction of Beech Wood and Miscanthus

et al. 2015

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Torrefaction is a thermochemical pre-treatment process for upgrading the properties of biomass to resemble those of fossil fuels such as coal. Biomass properties of particular interest are chemical composition, physical property and combustion characteristics. In this work, torrefaction of beech wood and miscanthus (sinensis) was carried out to study the influence of torrefaction temperature (240-300 °C) and residence time (15-150 min) on the aforementioned properties of the biomass. Results of the study revealed that torrefaction temperature has a significant influence on mass and energy yields, whereas the influence of the residence time becomes more apparent for the higher torrefaction temperatures (>280 °C). Torrefied miscanthus resulted in higher energy densification compared to beech wood for a residence time of 30 min. A significant improvement in grindability of the torrefied beech wood was obtained even for lightly torrefied beech wood (at 280 °C and 15 min of residence time). Observation from the combustion study showed that the ignition temperature is slightly affected by the torrefaction temperature. As a whole, the torrefaction temperature determines the characteristics of the torrefied fuel compared to other process parameters like residence time. Furthermore, with optimal process conditions, torrefaction produces a solid fuel with OPEN ACCESSEnergies 2015, 8 3904 combustion reactivity and porosity comparable to raw biomass, whereas grindability and heating value are comparable to low quality coal.

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Section: Ignition Temperature Of the Torrefied Biomass In A Tgamentioning

confidence: 99%

Experimental Study on Dry Torrefaction of Beech Wood and Miscanthus

et al. 2015

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“…Visual flash has been used as an indicator of coal ignition [10][11][12]. Thermogravimetric analysis (TGA) is another technique commonly used to determine the temperature and mechanism of coal ignition [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Ignition characteristics of coal blends in an entrained flow furnace

Faúndez

Arias

Rubiera

et al. 2007

Fuel

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“…One of the most commonly used is based on direct observation of the ignition event [17,18,19]. The other techniques are based on monitoring the evolution of the gases during coal particle ignition [20,21]. In this work the second approach was employed.…”

Section: Ignition Testsmentioning

confidence: 99%

Effect of biomass blending on coal ignition and burnout during oxy-fuel combustion

Arias

Pevida

Rubiera

et al. 2008

Fuel

154

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Oxy-fuel combustion is a GHG abatement technology in which coal is burned using a mixture of oxygen and recycled flue gas, to obtain a rich stream of CO 2 ready for sequestration. An entrained flow reactor was used in this work to study the ignition and burnout of coals and blends with biomass under oxy-fuel conditions. Mixtures of CO 2 /O 2 of different concentrations were used and compared with air as reference. A worsening of the ignition temperature was detected in CO 2 /O 2 mixtures when the oxygen concentration was the same as that of the air. However, at an oxygen concentration of 30% or higher, an improvement in ignition was observed. The blending of biomass clearly improves the ignition properties of coal in air. The burnout of coals and blends with a mixture of 79%CO 2 -21%O 2 is lower than in air, but an improvement is achieved when the oxygen concentration is 30 or 35%. The results of this work indicate that coal burnout can be improved by blending biomass in CO 2 /O 2 mixtures.

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Indicators of ignition for clouds of pulverized coal

Cited by 37 publications

References 5 publications

Experimental Study on Dry Torrefaction of Beech Wood and Miscanthus

Experimental Study on Dry Torrefaction of Beech Wood and Miscanthus

Ignition characteristics of coal blends in an entrained flow furnace

Effect of biomass blending on coal ignition and burnout during oxy-fuel combustion

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