Thermogravimetric assessment of combustion characteristics of blends of a coal with different biomass chars

Sahu, S.G.; Sarkar, Pinaki; Chakraborty, Nilanjan; Adak, A.K.

doi:10.1016/j.fuproc.2009.12.001

Cited by 183 publications

(71 citation statements)

References 25 publications

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“…In a later study, also using thermogravimetric techniques, Haykiri and Yaman [2009] determined that the higher or lower burnout obtained when mixing lignites with two different types of biomass, was heavily dependent on the type of biomass in the blend. Finally, Sahu et al [2010] corroborated earlier hypotheses regarding the importance of the different levels of reactivity of the blend components. In effect, these authors determined that mixing chars of biomass (highly reactive) with coal (less reactive) would not necessarily result in better burns (increased burnout).…”

Section: Introduction 12supporting

confidence: 85%

Burnout synergic or inhibiting effects in combustion of coal-sawdust blends

Ulloa

Garcı́a

2014

ing.inv.

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The co-firing of coal and biomass was studied using DTG assays. Blends of coal of different ranks and pine charcoal (obtained through pyrolysis of biomass at 1000°C) were prepared. Combustion profiles and characteristic temperatures (IT, PT and BT) were obtained and compared. To detect deviations, the experimental burnout curves for each blend were compared with weighted averages calculated from the conversion profiles obtained for the individual fuel samples and the blend composition. Positive and negative deviations were obtained which can be predicted from the differences in the reactivity of the blend components and their relative proportions. Keywords:Coal-biomass co-firing, Biomass, Coal, DTG. RESUMENSe estudia la combustión de mezclas de carbones de diferente rango con carbonizados de pino (pirolizados a 1000ºC) mediante ensayos DTG. Se registraron perfiles de combustión y temperaturas características (IT, PT y BT). Para detector desviaciones en el quemado de las mezclas, se compararon las curvas experimentales de conversión con aquellas obtenidas a partir del promedio ponderado calculado a partir de la conversión de los combustibles individuales y la composición de la mezcla. Estos ensayos revelaron que existen tanto desviaciones positivas como negativas en la conversión. Los factores clave en la predicción de estas desviaciones corresponden a las diferencias de reactividad entre los componentes de la mezcla y su proporción relativa.

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Section: Introduction 12supporting

confidence: 85%

Burnout synergic or inhibiting effects in combustion of coal-sawdust blends

Ulloa

Garcı́a

2014

ing.inv.

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“…The characteristics of low calorific and limitations of the prior art combustion value fuel, which limit its large-scale use [7], but mixed combustion is an effective way to improve their combustion and combustion efficiency [8][9][10]. The mechanism of low calorific value of blended coal combustion was understood by the study of lignite coals and coal gangue mixed combustion dynamics, which can effectively guide the combustion process.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Assessment of Combustion Characteristics of Blends of Lignite Coals with Coal Gangue

Song¹,

Wen²,

Li³

et al. 2017

Proceedings of the 3rd Annual International Conference on Mechanics and Mechanical Engineering (MME 2016)

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Abstract. In this paper, the co-combustion behaviour of lignite coal with coal gangue and coal are investigated by a thermogravimetric analysis (TGA) in the temperature range from ambient temperature to 1000 ℃. The thermal characteristics and kinetics of lignite coal, coal gangue and their blends are evaluated under combustion conditions using a non-isothermal thermogravimetric method (TGA). Lignite coal is blended with coal gangue in the range of 25-75 wt. % to evaluate their cocombustion behaviour. Such attempts of Combustion characteristics index under different proportions of analysis may help to identify appropriate blend proportion for a given coal gangue and to derive some specific advantages with respect to particular combustion practice.

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“…42,43) The combustion reaction activation energy of coke breeze and charcoal were 122.75 kJ·mol − 1 and 55.54 kJ·mol − 1 respectively as shown in Table 4. Hence, the activation energy of charcoal is much lower than that of coke breeze in the combustion zone, indicating that the combustion reaction of charcoal is much easier to carry out, as it has been reported by Sahu et al 24) From Table 4, it could also find that when the charcoal was modified by 3% B 2 O 3 and 2% SiO 2 , the activation energy of combustion reaction was increased from 55.54 kJ·mol − 1 to 92.82 kJ·mol − 1 and 86.97 kJ·mol − 1 respectively, which indicated a significant improvement compared with non-modified case. Therefore, the activation energy of charcoal showed a closer value to coke breeze, which demonstrated that the combustion reaction of modified fuel needed more calories to trigger, thereby inhibiting the combustion reaction.…”

Section: Influences On Combustion Kineticsmentioning

confidence: 72%

Influence of Surface Modification on Combustion Characteristics of Charcoal and Its Performance on Emissions Reduction in Iron Ore Sintering

Gan

et al. 2017

ISIJ International

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Thermogravimetric assessment of combustion characteristics of blends of a coal with different biomass chars

Cited by 183 publications

References 25 publications

Burnout synergic or inhibiting effects in combustion of coal-sawdust blends

Burnout synergic or inhibiting effects in combustion of coal-sawdust blends

Thermogravimetric Assessment of Combustion Characteristics of Blends of Lignite Coals with Coal Gangue

Influence of Surface Modification on Combustion Characteristics of Charcoal and Its Performance on Emissions Reduction in Iron Ore Sintering

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