Overall reaction rates of NO and N2 formation from fuel nitrogen

Soete, G. G. De

doi:10.1016/s0082-0784(75)80374-2

Cited by 506 publications

(252 citation statements)

References 2 publications

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“…The production of NOx from nitrogen-containing fuels results from the conversion of fuel-bound nitrogen to NOx during combustion. Fuel nitrogen is usually assumed to react via the intermediates of HCN and NH 3 , which are finally either oxidized into NO or reduced into N 2 [41]. In this work, it was assumed that 90% of the volatile nitrogen from coal will be converted to HCN, and the rest will form NH 3 [42].…”

Section: (C) Nox Modelmentioning

confidence: 99%

Flame characteristics of pulverized torrefied-biomass combusted with high-temperature air

Biagini

Yang

et al. 2013

Combustion and Flame

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This version is available at https://strathprints.strath.ac.uk/53528/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Abstract:In this work, the flame characteristics of torrefied biomass were studied numerically under hightemperature air conditions to further understand the combustion performances of biomass.Three torrefied biomasses were prepared with different torrefaction degrees after by releasing 10%, 20%, and 30% of volatile matter on a dry basis and characterized in laboratory with standard and high heating rate analyses. The effects of the torrefaction degree, oxygen concentration, transport air velocity, and particle size on the flame position, flame shape, and peak temperature are discussed based on both direct measurements in a laboratory-scale furnace and CFD simulations. The results primarily showed that the enhanced drag force on the biomass particles caused a late release of volatile matter and resulted in a delay in the ignition of the fuelair mixture, and the maximum flame diameter was mainly affected by the volatile content of the biomass materials. Furthermore, oxidizers with lower oxygen concentrations always resulted in a larger flame volume, a lower peak flame temperature and a lower NO emission. Finally, a longer flame was found when the transport air velocity was lower, and the flame front gradually moved to the furnace exit as the particle size increased. The results could be used as references for designing a new biomass combustion chamber or switching an existing coal-fired boiler to the combustion of biomass.

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Section: (C) Nox Modelmentioning

confidence: 99%

Flame characteristics of pulverized torrefied-biomass combusted with high-temperature air

Biagini

Yang

et al. 2013

Combustion and Flame

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“…According to [8] In order to evaluate overall NO source term, single source terms have to be summarized. This overall source term can be further used in transport equations.…”

Section: No Hcn Nh 3 Reactionsmentioning

confidence: 99%

Numerical Simulation of NO Production in Air-Staged Pulverized Coal Fired Furnace

Straka¹,

Beneš²

2010

TOTHERJ

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Abstract:We describe behavior of the air-coal mixture using the Navier-Stokes equations for the mixture of air and coal particles, accompanied by a turbulence model. The undergoing chemical reactions are described by the Arrhenian kinetics (reaction rate proportional to RT E e ). We also consider the heat transfer via conduction and radiation. The system of PDEs is discretized using the finite volume method (FVM) and an advection upstream splitting method as the Riemann solver. The resulting ODEs are solved using the 4th-order Runge-Kutta method. Simulation results for typical power production level are presented together with the air-staging impact on NO production.

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“…2 Gas-phase reaction mechanism to Fuel NOx Fig. 3 Grid geometry and mesh of boiler furnace with a tangential burner (18,19) 에 의해 다음과 같이 나타낸 다. 참고문헌…”

Section: Rate Parameters Numeric Valuesunclassified

Numerical Study of the Optimization of Combustion and Emission Characteristics of Air-Staged Combustion in a Pulverized Coal-Fired Boiler

Yoon¹,

Lee²,

Song³

et al. 2010

Transactions of the Korean Society of Mechanical Engineers B

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Overall reaction rates of NO and N2 formation from fuel nitrogen

Cited by 506 publications

References 2 publications

Flame characteristics of pulverized torrefied-biomass combusted with high-temperature air

Flame characteristics of pulverized torrefied-biomass combusted with high-temperature air

Numerical Simulation of NO Production in Air-Staged Pulverized Coal Fired Furnace

Numerical Study of the Optimization of Combustion and Emission Characteristics of Air-Staged Combustion in a Pulverized Coal-Fired Boiler

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