Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Choudhury, Nandita; Biswas, S.; Sarkar, Pinaki; Kumar, M. Dileep; Ghosal, S.; Mitra, Tamoghna; Mukherjee, Ashis K.; Choudhury, A.

doi:10.1016/j.coal.2007.11.002

Cited by 28 publications

(20 citation statements)

References 18 publications

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“…And this can be the very reason why inertinite-derived UC can be (in some cases) highly reactive and for some high volatile bituminous coals even more reactive than vitrinite-derived ones [61][62][63]. This is consistent with conclusions presented by Choudhury et al [33] where inertinite showed even better reactivity than vitrinite (when various coals and their fractions were combusted). It was concluded that low-reflecting inertinite in the combusted coals contributed to the good burning behavior of these inertinite-rich Indian coals.…”

Section: Effect Of Inertinite Content In Coalsupporting

confidence: 91%

“…However, some studies have presented results where inertinite content in coal and coal burnout efficiency was not in exact positive relation [31,33].…”

Section: Effect Of Inertinite Content In Coalmentioning

confidence: 86%

“…Even if UC presence in ash is unavoidable feature of the coal combustion process, lower UC levels in ash can be achieved if e.g., lower or medium rank coal containing reactive macerals and low moisture content is combusted [33].…”

Section: Approaches To Decrease Uc Levels In Ashmentioning

confidence: 99%

“…-coal rank [31][32][33] -maceral composition of coal [8,17,18,31,[34][35][36][37][38][39] -volatile matter content [26,40] -moisture content in coal [10,41] -particle-size effect [9,10,16,26,[42][43][44] -coal char properties (porosity, fragmentation, specific surface area, etc.) [8,26,45] -effect of coal mineral matter [8,16,26,46] -coal blending [32,39,44,[47][48][49] -co-combustion of coal with alternative fuels [50][51][52][53][54].…”

Section: Effect Of Coal Characteristicsmentioning

confidence: 99%

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Unburned carbon from coal combustion ash: An overview

Bartoňová

2015

Fuel Processing Technology

138

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Section: Effect Of Inertinite Content In Coalsupporting

confidence: 91%

“…However, some studies have presented results where inertinite content in coal and coal burnout efficiency was not in exact positive relation [31,33].…”

Section: Effect Of Inertinite Content In Coalmentioning

confidence: 86%

Section: Approaches To Decrease Uc Levels In Ashmentioning

confidence: 99%

Section: Effect Of Coal Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Unburned carbon from coal combustion ash: An overview

Bartoňová

2015

Fuel Processing Technology

138

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“…Coals with similar chemical composition do not always have similar burnout characteristics. Therefore, not only conventional parameters to identify the suitability of the coals for power generation should be investigated but also differences in the petrographic composition should be in considered [5,15].…”

Section: Introductionmentioning

confidence: 99%

Prediction of unburned carbon in bottom ash in terms of moisture content and sieve analysis of coal

Bilen

Kizgut

Akkaya

2015

Fuel Processing Technology

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The competitive reaction mechanism between oxidation and pyrolysis consumption during low‐rank coal combustion at lean‐oxygen conditions: A quantitative calculation based on thermogravimetric analyses

Wang

Xin

et al. 2018

Can J Chem Eng

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The evolution of the oxidation-pyrolysis competitive mechanism during low-rank coal combustion at lean-oxygen conditions determines the development of the coalfield fires and the burning loss rate of the coal resource. In the present work, the mass increments of oxygen-chemisorption were measured and calculated firstly. An abstract shrinking core model was built for distinguishing the oxidation and pyrolysis pathways. On this basis, the consumption rates of oxidation and pyrolysis were respectively calculated with the TGA data obtained under the lean-oxygen gradient of 21-0 %. The results demonstrate that the oxidation path gradually delays in temperature while the pyrolysis exhibits great temperature stability as the oxygen concentration decreases. Besides, the significant transition of the competitive consumption mechanism exists below 9 % for the oxidation phase before ignition and 5 % for the combustion phase after ignition, respectively. Two temperature indicators of T C1 and T C2 for guiding the optimal fire extinguishing schemes based on the actual oxygen concentrations and temperatures are proposed. Furthermore, 1 % is identified as the limiting oxygen concentration for the development of the coalfield fires where the ignition mechanisms of both the HST and WD coal transform into the homogeneous ignition. The WD lignite, which always maintains the coke state as the burnout mechanism, holds higher reactivity but wider dispersion degrees of combustion compared with the HST sub-bituminous coal.

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Influence of rank and macerals on the burnout behaviour of pulverized Indian coal

Cited by 28 publications

References 18 publications

Unburned carbon from coal combustion ash: An overview

Unburned carbon from coal combustion ash: An overview

Prediction of unburned carbon in bottom ash in terms of moisture content and sieve analysis of coal

The competitive reaction mechanism between oxidation and pyrolysis consumption during low‐rank coal combustion at lean‐oxygen conditions: A quantitative calculation based on thermogravimetric analyses

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