Study of the thermal behaviour of coal/biomass blends during oxy-fuel combustion by thermogravimetric analysis

Contreras, M.L.; García-Frutos, F. J.; Bahillo, A.

doi:10.1007/s10973-015-5067-1

Cited by 30 publications

(6 citation statements)

References 30 publications

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“…Thus it is expected that the blending of BP with BC or XL would promote the combustion property. Similar thermal characteristics due to the presence of biomass are also reported by previous studies [8,33,34].…”

Section: Thermogravimetric Analysis Of Bc XL and Bpsupporting

confidence: 89%

Thermogravimetric analysis on the co-combustion of biomass pellets with lignite and bituminous coal

Guo

Hassanpour

et al. 2020

Energy

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This work presents comparative study on the combustion of biomass pellets (BP) with Bituminous coal (BC), and Xiao longtan lignite (XL) using thermogravimetric (TG) analysis. The results show that the combustion process of BP:BC can be divided into the release and combustion of volatile compounds, oxidation of BP char and combustion of BC char. Whilethere are two stages for the blend of XL and BP, which are the combustion of volatile compounds and the char burning of BP and XL. With increasing BP ratio, the maximum combustion rate and combustion index increase, while the burnout temperature decreases, indicating the combustion performance of coal can be improved. In addition, interactions between BP and XL are more significant than that of BP and BC. The maximum deviations are found to be 30% BP with BC and 10% BP with XL. Reaction mechanisms are analysed using Coats-Redfern method. The first order model is found to be suitable for the first stage of biomass burn (stage 1) and coal combustion of BC:BP blends. Diffusion controlled model D3 and D4 are the most effective for the second stage of biomass burn and XL combustion, respectively. The minimum activation energies of biomass blending is obtained with a BP ratio of 30% for BC and 10% for XL.

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Section: Thermogravimetric Analysis Of Bc XL and Bpsupporting

confidence: 89%

Thermogravimetric analysis on the co-combustion of biomass pellets with lignite and bituminous coal

Guo

Hassanpour

et al. 2020

Energy

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“…The sample was thermogravimetrically analyzed using a German Netzsch STA-409PC thermobalance and was heated from room temperature to 1000 °C at a heating rate of 20 °C/min. − In each experiment, approximately 10 mg of the sample was taken, the combustion atmosphere was air, and the flow rate was 100 mL/min.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Research on Combustion Properties and Pollutant Emission Characteristics of Blends of Maltol Byproduct/Pine Sawdust

et al. 2021

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In this paper, the combustion and pollutant emission characteristics of maltol byproduct, pine sawdust, and their blends were experimentally studied by thermogravimetry, tube furnace experiment, and scanning electron microscopy. The results show that the combustion process of maltol byproduct, pine sawdust, and their blends can be divided into three stages, in which the volatile release of the maltol byproduct includes two stages. The ignition temperature of the blended fuel is lower than that of sawdust. The NO x produced by combustion of the blended fuel is lower than that produced by sawdust combustion alone, and the SO 2 emission is always at a low level. There is a certain synergy between maltol byproduct and pine sawdust mixed combustion. Comprehensively comparing the combustion characteristics and emission characteristics, the blended fuel made by adding less than 10% maltol byproduct into pine sawdust can improve the combustion characteristics and reduce emissions, and 10% is the best proportion of the blended fuel.

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“…Combining the biomass combustion and Carbon Capture Utilization and Storage (CCUS) technologies can further contribute to the reduction of CO 2 emission, even achieving negative net CO 2 emission. − Quantities of studies stated that combustion behavior, including ignition and burn-out performance, can be improved under an O 2 -enriched (O 2 % ≥ 30%) oxy-fuel atmosphere, ,, which is conducive to the utilization of semi-coke. In particular, Airas et al studied the effect of biomass on coal ignition and burn-out under an oxy-fuel atmosphere in an entrained flow reactor and suggested that coal ignition and burn-out can be improved by blending biomass .…”

Section: Introductionmentioning

confidence: 99%

“…addressed that ignition, burn-out, and NO emission can be improved by adding biomass to semi-anthracite or bituminous during oxy-fuel combustion, while Varol et al reported that blending biomass with lignite had no impact on NO x emission but little positive impact on CO emission . Contreras et al investigated the combustion behavior of coal/biomass blends in a thermogravimetric system and reported that reactivities of coal can be modified by blending with biomass . Fryda et al studied the ash deposition properties during coal/biomass blended fuel oxy-fuel combustion and found that blending biomass can lower the deposition tendency compared with unblended coals .…”

Section: Introductionmentioning

confidence: 99%

“…22 Contreras et al investigated the combustion behavior of coal/biomass blends in a thermogravimetric system and reported that reactivities of coal can be modified by blending with biomass. 21 Fryda et al studied the ash deposition properties during coal/biomass blended fuel oxyfuel combustion and found that blending biomass can lower the deposition tendency compared with unblended coals. 23 Skeen et al reported that co-firing sawdust with a smaller mean particle size resulted in reduced NO emissions under air-fired combustion and no changes under oxy-fuel combustion.…”

Section: Introductionmentioning

confidence: 99%

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Combustion Performance and Ash Compositions during Biomass/Semi-Coke Blended Fuel Oxy-Fuel Circulating Fluidized Bed Combustion

Liu

et al. 2020

Energy Fuels

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Co-combustion biomass with semi-coke under oxy-fuel combustion is a promising way to reduce CO2 emission and achieve the integrated utilization of biomass and semi-coke. To provide hints on the further industrial utilization, cornstalk was co-combusted with Shenmu semi-coke under oxy-fuel combustion atmospheres in a 50 kW circulating fluidized bed (CFB) test rig, of which the operating parameters can be well controlled. Results showed that semi-coke can achieve stable combustion under an oxy-fuel combustion atmosphere with 30% inlet oxygen concentration. Although inferior to that of cornstalk/coal blended fuel, the combustion performance (ignition and pollutants emission) of cornstalk/semi-coke blended fuel was superior to that of unblended semi-coke. In addition, the increase in the blending ratio of cornstalk or inlet oxygen concentration under the oxy-fuel combustion atmosphere was conducive to reduce the emission concentrations of CO, N2O, and NO. K tended to release into the gas phase during co-combustion with the semi-coke process, especially under a high blending ratio. High CaO content in semi-coke or coal would result in enrichment of S in bottom ash and circulating ash, which, in turn, inhibited the reaction between S-containing species and KCl, while Cl would accomplish almost total release from fuel, and then it would be enriched in deposits.

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Study of the thermal behaviour of coal/biomass blends during oxy-fuel combustion by thermogravimetric analysis

Cited by 30 publications

References 30 publications

Thermogravimetric analysis on the co-combustion of biomass pellets with lignite and bituminous coal

Thermogravimetric analysis on the co-combustion of biomass pellets with lignite and bituminous coal

Research on Combustion Properties and Pollutant Emission Characteristics of Blends of Maltol Byproduct/Pine Sawdust

Combustion Performance and Ash Compositions during Biomass/Semi-Coke Blended Fuel Oxy-Fuel Circulating Fluidized Bed Combustion

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