Co-combustion behaviors and NO formation characteristics of semi-coke and antibiotic filter residue under oxy-fuel condition

Wang, Chaowei; Wang, Chang‐An; Tang, Guantao; Zhang, Jinming; Gao, Xinyue; Che, Defu

doi:10.1016/j.fuel.2022.123779

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…But to use it, a large amount of initial data is required, obtained either during balance tests of the boiler or when using experimental stands that simulate the operation of the boiler furnace [15,16]. The results of thermal analysis (TGA) of fuels are well suited as additional characteristics of the above methods, allowing one to expand the theoretical and experimental scientific base [17]. The conditions and characteristics of the physical and chemical processes occurring within the TGA differ from the conditions of solid fuel combustion in the boiler furnace.…”

Section: Introductionmentioning

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

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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.

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Section: Introductionmentioning

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

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“…Pyrolysis is a key step in producing high-value fuel such as coal gas or tar [2,3]. However, several hundred million tons of semi-coke are produced from coal pyrolysis processes every year [4]. Semi-coke has some difficulties with stable ignition and high-efficiency combustion, due to it possessing less than 10% volatile content [5,6].…”

Section: Introductionmentioning

confidence: 99%

Preheating Analysis of Semi-Coke in a Circulating Fluidized Bed and Its Kinetic Characteristics

2023

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Semi-coke has difficulties with stable ignition and high-efficiency combustion due to its low volatile content. Preheating in a circulating fluidized bed before combustion offers a novel method for the improvement of fuel properties. During preheating, the semi-coke was converted to preheated fuel composed of coal gas and preheated char. When increasing the preheating temperature, the ratio of CO/CO2 in the coal gas significantly increased, while the ratio of CH4/CO2 remained almost unchanged. After preheating, the release ratios for different species from the semi-coke followed the order C >H > N > S. Thermogravimetric analysis was used to evaluate the kinetic characteristics. We found that the ignition and burnout temperatures of the preheated char decreased compared to those of the semi-coke, and the reaction rate constant for the preheated char increased by 20 times. Three models were used to predict the variations in the conversion ratio with time, and the modified volumetric reaction model showed good agreement with the experiment. This investigation provides support for better developing preheating combustion technology in the future.

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“…42,43 In this study, semi-coke activated carbon (SAC) with a developed pore structure and large specific surface area was prepared by carbonization activation from solid waste semi-coke powder produced by low-temperature dry distillation of coal. 44 The rational use of semi-coke powder can increase the added value of semi-coke and alleviate the environmental pollution caused by solid waste. In this study, solid waste from the coal chemical industry was used as a raw material, and the ternary heterojunction BiPO 4 -BiVO 4 -g-C 3 N 4 photocatalyst was supported by a one-step sol-gel method to achieve high-efficiency degradation of toluene.…”

Section: Introductionmentioning

confidence: 99%

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation

Shi

Xue

Xiao

et al. 2022

Phys. Chem. Chem. Phys.

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Co-combustion behaviors and NO formation characteristics of semi-coke and antibiotic filter residue under oxy-fuel condition

Cited by 14 publications

References 32 publications

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

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

Preheating Analysis of Semi-Coke in a Circulating Fluidized Bed and Its Kinetic Characteristics

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation

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Co-combustion behaviors and NO formation characteristics of semi-coke and antibiotic filter residue under oxy-fuel condition

Cited by 14 publications

References 32 publications

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

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

Preheating Analysis of Semi-Coke in a Circulating Fluidized Bed and Its Kinetic Characteristics

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO4–BiPO4–g-C3N4 under visible light irradiation

Contact Info

Product

Resources

About

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation