Ignition and combustion behavior of gel fuel particles with metal and non-metal additives

Glushkov, Dmitrii O.; Paushkina, Kristina; Pleshko, A.O.; Yanovsky, Vyacheslav

doi:10.1016/j.actaastro.2022.11.027

Cited by 4 publications

(1 citation statement)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the introduction of fine coal particles into the heated airflow, almost all of the supplied heat from an external source is spent on the endothermic processes of phase transformation (moisture evaporation) and thermal decomposition, accompanied by heat absorption. In addition, coal has a fairly dense structure, mainly with closed pores relative to the external gaseous medium [38]. Therefore, coal (composition C-1), in contrast to biomass, requires more energy (and, accordingly, time at T a = const) to start heterogeneous combustion.…”

Section: Characteristics Of Fuel Ignition In a Heated Airflowmentioning

confidence: 99%

Influence of the Composition and Particle Sizes of the Fuel Mixture of Coal and Biomass on the Ignition and Combustion Characteristics

Glushkov,

Zhuikov,

Zemlyansky

et al. 2023

Applied Sciences

Self Cite

View full text Add to dashboard Cite

The work determines the characteristics of the processes of thermal decomposition and combustion when heating coal, cedar needles, and their mixtures with different fuel particle sizes. Based on the results of thermal analysis, the following characteristics were determined: the temperature at which the coke residue ignition occurs, the temperature at which the combustion process is completed, and the combustion index. An analysis was carried out of the interaction between the fuel mixture components on the characteristics of their combustion for compositions (50% coal and 50% biomass) with a particle size of 100–200 μm and 300–400 μm. The combustion kinetic parameters of individual solid fuels and their mixtures containing 50% coal and 50% biomass are compared. The activation energy for coal combustion was 60.3 kJ mol−1, for biomass 24.6 kJ mol−1, and for mixture 42.5 kJ mol−1. The co-combustion of coal and biomass has a positive effect on the main combustion characteristics of solid fuels. Fuels with particle sizes of 100–200, 200–300, and 300–400 μm were studied at temperatures of 500–800 °C under heating conditions in a heated airflow. Using a hardware-software complex for high-speed video recording of fast processes, the ignition delay times were determined, the values of which for the considered fuels vary in the range from 0.01 to 0.20 s. Adding 50 wt% biomass with particle sizes of 100–200, 200–300, and 300–400 μm to coal reduces the ignition delay times of mixtures by 55, 41, and 27%, respectively. The results obtained can become the basis for the conversion and design of modern power plants operating on solid fuel mixtures to co-combust coal with biomass.

show abstract

Section: Characteristics Of Fuel Ignition In a Heated Airflowmentioning

confidence: 99%