The effect of biomass pyrolysis gas reburning on N2O emission in a coal-fired fluidized bed boiler

Hu, Xiaoying; Chen, Dong; Yang, Yongping; Zhang, Junjiao

doi:10.1007/s11434-010-4145-9

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…Such feedstock treatment requires higher specific investment cost compared to direct co-combustion [169,170] but allows diverting (a part of) the obtained material for other use than heat and power production: chemicals and fuels production [166], or highly efficient heat and power production in combined cycles [171]; both requiring extensive gas cleaning [172]. The obtained combustible gas can be introduced to fossil fuels combustors as reburning fuel [110], which contributes to nitrogen oxides emissions reduction [104,119,173].…”

Section: Direct Parallel and Indirect (Gasification) Co-combustionmentioning

confidence: 99%

Advances in Biomass Co-Combustion with Fossil Fuels in the European Context: A Review

et al. 2021

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Co-combustion of biomass-based fuels and fossil fuels in power plant boilers, utility boilers, and process furnaces is a widely acknowledged means of efficient heat and power production, offering higher power production than comparable systems with sole biomass combustion. This, in combination with CO2 and other greenhouse gases abatement and low specific cost of system retrofit to co-combustion, counts among the tangible advantages of co-combustion application. Technical and operational issues regarding the accelerated fouling, slagging, and corrosion risk, as well as optimal combustion air distribution impact on produced greenhouse gases emissions and ash properties, belong to intensely researched topics nowadays in parallel with the combustion aggregates design optimization, the advanced feed pretreatment techniques, and the co-combustion life cycle assessment. This review addresses the said topics in a systematic manner, starting with feed availability, its pretreatment, fuel properties and combustor types, followed by operational issues, greenhouse gases, and other harmful emissions trends, as well as ash properties and utilization. The body of relevant literature sources is table-wise classified according to numerous criteria pertaining to individual paper sections, providing a concise and complex insight into the research methods, analyzed systems, and obtained results. Recent advances achieved in individual studies and the discovered synergies between co-combusted fuels types and their shares in blended fuel are summed up and discussed. Actual research challenges and prospects are briefly touched on as well.

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Section: Direct Parallel and Indirect (Gasification) Co-combustionmentioning

confidence: 99%

Advances in Biomass Co-Combustion with Fossil Fuels in the European Context: A Review

et al. 2021

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“…Indirect reburning is rich in methane, hydrogen, carbon monoxide and other reducing substances. It has a very low sulfur content and is ideal for reburning fuel,which effectively reduce nitrogen oxide emissions [10].Germany Hein et al [11],the University of Stuttgart , obtained from biomass…”

Section: Figure 1 Reburning Process[7]mentioning

confidence: 99%

The Research Progress on Biomass Fuel Reburning

Yang

2014

AMM

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Biomass is the great potential and renewable energy, and technologies of its use have become an important topic today. As a way to use biomass fuel, biomass reburning significantly reduce NOx in boilers, and has good application prospects. This article describes the application , background and technical overview of biomass reburning, and focuses on biomass reburning research progress in order to work for the follow-up study providing a valuable reference.

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“…In addressing the challenge of reducing N 2 O emissions, thermal decomposition emerges as a particularly promising approach among various technologies [9][10][11][12][13][14][15]. This process is governed by a series of critical chemical reactions, crucial for understanding the N 2 O thermal decomposition mechanism:…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, thermal decomposition processes are primarily categorized by their heat sources: electric furnaces [9][10][11], plasma [12,13], and combustion [14,15]. Although using an electric furnace as the heat source offers operational simplicity and lower technical demands, it incurs higher maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Impact of K-H Instability on NOx Emissions in N2O Thermal Decomposition Using Premixed CH4 Co-Flow Flames and Electric Furnace

Park,

Kim,

et al. 2023

Energies

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This study systematically investigates the formation of NOx in the thermal decomposition of N2O, focusing on the impact of Kelvin–Helmholtz (K-H) instability in combustion environments. Using premixed CH4 co-flow flames and an electric furnace as distinct heat sources, we explored NOx emission dynamics under varying conditions, including reaction temperature, residence time, and N2O dilution rates (XN2O). Our findings demonstrate that diluting N2O around a premixed flame increases flame length and decreases flame propagation velocity, inducing K-H instability. This instability was quantitatively characterized using Richardson and Strouhal numbers, highlighting N2O’s role in augmenting oxygen supply within the flame and significantly altering flame dynamics. The study reveals that higher XN2O consistently led to increased NO formation independently of nozzle exit velocity (ujet) or co-flow rate, emphasizing the influence of N2O concentration on NO production. In scenarios without K-H instability, particularly at lower ujet, an exponential rise in NO2 formation rates was observed, due to the reduced residence time of N2O near the flame surface, limiting pyrolysis effectiveness. Conversely, at higher ujet where K-H instability occurs, the formation rate of NO2 drastically decreased. This suggests that K-H instability is crucial in optimizing N2O decomposition for minimal NOx production.

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The effect of biomass pyrolysis gas reburning on N2O emission in a coal-fired fluidized bed boiler

Cited by 7 publications

References 22 publications

Advances in Biomass Co-Combustion with Fossil Fuels in the European Context: A Review

Advances in Biomass Co-Combustion with Fossil Fuels in the European Context: A Review

The Research Progress on Biomass Fuel Reburning

Impact of K-H Instability on NOx Emissions in N2O Thermal Decomposition Using Premixed CH4 Co-Flow Flames and Electric Furnace

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