NO formation during co-combustion of coal with two thermally treated biomasses

Allgurén, Thomas; Edland, Rikard; Andersson, Klas; Fry, Andrew; Eddings, Eric G.; Normann, Fredrik

doi:10.1016/j.fuproc.2022.107365

Cited by 9 publications

(2 citation statements)

References 34 publications

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“…Among the adopted methods, the coupled combustion of biomass and coal has garnered considerable attention from researchers. This technology leverages the existing boilers and auxiliary systems in current coal-fired power plants, offering advantages such as lower initial costs, heightened efficiency in biomass power supply, and reduced CO 2 and NO x emissions by comparing with the traditional power generation methods. − Consequently, coupled biomass–coal power generation has emerged as an effective means of enhancing the utilization of biomass energy and curbing pollutant emissions in existing coal power plants . To reduce greenhouse gas emissions and increase the proportion of renewable energy use globally, cocombustion with biogas in the coal-fired boiler has been widely studied for power generation. , …”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Combustion Characteristics of Biogas Cocombustion in a 300MW Coal-Fired Boiler Furnace

Shang,

Xie,

Chen

et al. 2024

ACS Omega

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To further explore cocombustion technology with biogas and coal, a series of numerical simulations have been carried out to analyze the effects of the cocombustion ratio ξ, height of biogas nozzle H GN , and tilt angle of burner θ BN on combustion characteristics in a 300 MW four-corner tangential boiler furnace. Three types of biogas are gasified from straw, sawdust, and raw wood when air serves as the gasification agent. The velocity field, temperature field, and NO emissions have been comprehensively analyzed when the values of ξ, H GN , and θ BN range, respectively, from 0.02 to 0.12, from 17.3 to 20.3 m, and from −15°to +15°. Results showed that the NO concentration at the furnace outlet monotonously decreased with ξ. The injection of biogas reduces both the peak temperature of the entire boiler furnace and the NO concentration at the furnace outlet. The NO emission concentration decreases with the increased ξ value for all types of biogases. The cocombustion with sawdust biogas indicates the least NO emission at a fixed cocombustion ratio. Furthermore, reducing the furnace height at H GN = 17.3 m or titling down the burner at θ BN = −15°contributed to a greater NO concentration at the furnace outlet.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Combustion Characteristics of Biogas Cocombustion in a 300MW Coal-Fired Boiler Furnace

Shang,

Xie,

Chen

et al. 2024

ACS Omega

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show abstract

“…Additionally, traditional sludge disposal techniques, including sanitary landfills and ocean dumping, have been subject to major limitations and restrictions due to their negative impacts on soil and groundwater. Compared to conventional methods, thermal treatment of sludge has been extensively applied as it enables energy recovery under environmentally friendly conditions. − As a critical first step in different thermal treatment technologies, sludge pyrolysis has attracted widespread attention. − However, the high moisture and ash content of sludge lead to pyrolysis products of suboptimal quality . In this regard, sludge/coal co-pyrolysis has the potential to enhance the quality of these products, considering the physical and chemical characteristics of both sludge and coal .…”

Section: Introductionmentioning

confidence: 99%