CFD and kinetic modelling study of methane MILD combustion in O2/N2, O2/CO2 and O2/H2O atmospheres

Tu, Yaojie; Xu, Minyi; Zhou, Dezhi; Wang, Qingxiang; Yang, Wenming; Líu, Hao

doi:10.1016/j.apenergy.2019.02.046

Cited by 70 publications

(28 citation statements)

References 39 publications

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“…The highest temperatures under the three working conditions were 1867, 1678, and 1834 K, respectively. Compared with ordinary combustion, the maximum temperatures at Oxy26 and Oxy31 were reduced by 189 and 33 K, respectively, which was similar to the combustion characteristics like coal, 18 methane, 38 and propane 39,40 …”

Section: Results and Analysissupporting

confidence: 60%

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Zhang

et al. 2022

Greenhouse Gases

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A numerical model of a 75 t/h gas‐fired boiler burning blast furnace gas (BFG) and coke oven gas (COG) was developed to study the effect of O2/CO2 conditions on the combustion characteristics, verified by comparing with the results measured in field experiments. The results showed that the ignition distance of COG was shorter than that of BFG, and COG reached the stable combustion temperature of 1000 K earlier in the condition of O2/CO2 combustion with 31% O2 than in the condition of air combustion. Under different O2/CO2 conditions, the overall temperature of gas‐fired boiler decreased. The maximum temperature of air combustion, O2/CO2 combustion with 26% O2, and O2/CO2 combustion with 31% O2 were 1867, 1678, and 1834 K, respectively. Under the condition of O2/CO2 combustion, the radiation heat transfer of mixed gas was enhanced, and the overall heat flux was obviously improved. Under the O2/CO2 condition, the overall temperature was lower than that of air combustion, but the wall heat flux increased. The NOx production decreased after the change to O2/CO2 combustion, and the NOx generation at the furnace arch decreased from 70.28 mg/m3 to 6.94 mg/m3 under the condition of O2/CO2 combustion with 26% O2. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Results and Analysissupporting

confidence: 60%

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Zhang

et al. 2022

Greenhouse Gases

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“…The detailed mechanism was used to predict the major species and NO x emissions. The discrete ordinates model was adopted to calculate the radiative heat transfer with the weighted-sum-ofgray-gases model, 29,30 which is used to predict the absorptivity of gas. The total emissivity and absorptivity of gas were calculated by the partial pressure of CO 2 and H 2 O, and the remaining gas was N 2 .…”

Section: Numerical Approachmentioning

confidence: 99%

Oxygen‐enriched flameless combustion of CH ₄ / H ₂ / CO mixtures

Kim

Park

Huh

et al. 2021

Intl J of Energy Research

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In the field of thermal energy, interest in carbon-free fuels, such as H 2 , is increasing to reduce greenhouse gas emissions; simultaneously, efforts are being made to reduce NO x emissions. In this study, experimental and numerical methodologies were applied to analyze the characteristics of flameless combustion under oxygen enrichment conditions for the simultaneous reduction of greenhouse gases and fine dust precursors. Flameless combustion was achieved under all conditions, and numerical simulations using GRI-mech 3.0

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“…Recientemente Tu et al [54] realizaron un estudio numérico usando simulaciones CFD de CH4 en condiciones de combustión sin llama en atmosferas de O2/N2, O2/ CO2 y O2/H2O, dentro de un horno de sección transversal cuadrada de 250 mm de lado y una longitud de 550 mm, equipado con sistemas de medición de especies y temperatura. Cuando el N2 es cambiado por CO2 o H2O como diluyente, los incrementos de temperatura al interior de la cámara de combustión se reducen, debido las propiedades físicas de estas dos especies.…”

Section: Combustión Sin Llama Con Combustibles Fósilesunclassified

“…Sin embargo, en el fenómeno de autoignición, el cual es parte esencial del funcionamiento del régimen de combustión sin llama, los estudios asociados son más limitados y complejos, ya que en combustión sin llama la ignición y la propagación de la reacción coexisten de forma simultánea. Fuente: [54].…”

Section: Combustión Sin Llama Con Combustibles Fósilesunclassified

Combustión sin llama como una alternativa para mejorar la eficiencia de sistemas térmicos: revisión del estado del arte

Yepes

Arrieta

Amell

2019

TecnoL.

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El aumento de la demanda energética, así como de las emisiones contaminantes ha generado un incremento de la investigación de tecnologías que permitan mitigar ambas problemáticas a nivel mundial. Dentro de las alternativas para mejorar la eficiencia de los procesos térmicos, el régimen de combustión sin llama se presenta como una de las alternativas más promisorias, puesto que permite obtener altos valores del rendimiento térmico mediante el mejoramiento de la transferencia de calor y del proceso de combustión, con la consiguiente reducción de las emisiones contaminantes. Debido a esto, en el presente estudio se realiza una revisión del estado del arte de dicha tecnología, haciendo énfasis en los aspectos fenomenológicos asociados, las principales características del régimen y su estabilidad, pasando por los mecanismos de obtención y la presentación de una serie de estudios, tanto a nivel nacional como internacional, en los que se utilizaron combustibles fósiles y alternativos. La revisión finaliza con la discusión de algunos casos en los cuales se ha implementado el régimen a nivel industrial.

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CFD and kinetic modelling study of methane MILD combustion in O2/N2, O2/CO2 and O2/H2O atmospheres

Cited by 70 publications

References 39 publications

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Oxygen‐enriched flameless combustion of CH ₄ / H ₂ / CO mixtures

Combustión sin llama como una alternativa para mejorar la eficiencia de sistemas térmicos: revisión del estado del arte

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CFD and kinetic modelling study of methane MILD combustion in O2/N2, O2/CO2 and O2/H2O atmospheres

Cited by 70 publications

References 39 publications

Numerical investigation of blast furnace gas and coke oven gas combustion under different O2/CO2 environments

Numerical investigation of blast furnace gas and coke oven gas combustion under different O2/CO2 environments

Oxygen‐enriched flameless combustion of CH 4 / H 2 / CO mixtures

Combustión sin llama como una alternativa para mejorar la eficiencia de sistemas térmicos: revisión del estado del arte

Contact Info

Product

Resources

About

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Numerical investigation of blast furnace gas and coke oven gas combustion under different O₂/CO₂ environments

Oxygen‐enriched flameless combustion of CH ₄ / H ₂ / CO mixtures