A small detailed chemical-kinetic mechanism for hydrocarbon combustion

Petrova, Maria V.; Williams, Forman A.

doi:10.1016/j.combustflame.2005.07.016

Cited by 149 publications

(102 citation statements)

References 73 publications

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“…The purpose of such an exercise was to choose a relatively small mechanism which can be suitably used for computation for such mixtures properly and for which computational effort is reasonable. Hence, other large mechanisms like Konnov release 0.5 [17] and the San Diego mechanism [18] were not considered. Computations for producer gas, which is represented as ternary mixtures of CO-CH 4 -H 2 with diluents N 2 and CO 2 with different compositions, have also been carried out.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in the computation of spherically expanding flames, this mechanism was not used. Also, other large mechanisms like San Diego mechanism [18] and Konnov release 0.5 [17] were not considered when using RUN1DL. On PREMIX, the computational time using this mechanism is relatively shorter, and hence it was decided to perform the PREMIX simulations using GRI Mech 3.0, while the RUN1DL calculations were confined to the Warnatz C1 and C2 mechanisms.…”

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confidence: 99%

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Effect of Hydrogen Content and Dilution on Laminar Burning Velocity and Stability Characteristics of Producer Gas-Air Mixtures

Velamati

Ravi

Ray

2008

International Journal of Reacting Systems

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Recommended by Lea-Der ChenProducer gas is one of the promising alternative fuels with typical constituents of H 2 , CO, CH 4 , N 2 , and CO 2 . The laminar burning velocity of producer gas was computed for a wide range of operating conditions. Flame stability due to preferential diffusional effects was also investigated. Computations were carried out for spherical outwardly propagating flames and planar flames. Different reaction mechanisms were assessed for the prediction of laminar burning velocities of CH 4 , H 2 , H 2 -CO, and CO-CH 4 and results showed that the Warnatz reaction mechanism with C1 chemistry was the smallest among the tested mechanisms with reasonably accurate predictions for all fuels at 1 bar, 300 K. To study the effect of variation in the producer gas composition, each of the fuel constituents in ternary CH 4 -H 2 -CO mixtures was varied between 0 to 48%, while keeping diluents fixed at 10% CO 2 and 42% N 2 by volume. Peak burning velocity shifted from φ = 1.6 to 1.1 as the combined volumetric percentage of hydrogen and CO varied from 48% to 0%. Unstable flames due to preferential diffusion effects were observed for lean mixtures of fuel with high hydrogen content. The present results indicate that H 2 has a strong influence on the combustion of producer gas.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Effect of Hydrogen Content and Dilution on Laminar Burning Velocity and Stability Characteristics of Producer Gas-Air Mixtures

Velamati

Ravi

Ray

2008

International Journal of Reacting Systems

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“…Its activation energy E a is equal to approximately 2000-2500 K [24,61]. However, theoretical studies revealed three different products of this reaction: C 2 H 4 + HO 2 , c−CH 2 CH 2 O + OH and CH 3 CHO + OH.…”

Section: (C) Ch 4 − O 2 Systemmentioning

confidence: 99%

Physics and chemistry of the influence of excited molecules on combustion enhancement

Starik

Loukhovitski

Sharipov

et al. 2015

Phil. Trans. R. Soc. A.

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The paper addresses detailed analysis of kinetic processes in the H 2 −O 2 , CO−O 2 and CH 4 −O 2 -reactive systems upon the presence of singlet oxygen molecules O 2 ( a 1 Δ g ) and and the influence of the activation of oxygen molecules in electric discharge on the acceleration of ignition in the H 2 −O 2 and CH 4 −O 2 mixtures. The possibility of the intensification of CO oxidation due to excitation of O 2 and N 2 molecule vibrations and generation of singlet oxygen molecules is also considered. It is shown that the effect of accelerating the ignition strongly depends on the reduced electric field and, as a consequence, on the composition of discharge plasma as well as on the features of chain mechanism development in oxy-fuel systems. It is revealed that the most effective approach for the intensification of CO oxidation both in the moist air and in the products of hydrocarbon combustion in air is the generation of O 2 ( a 1 Δ g ) molecules by electric discharge. Computations showed that the presence of 1% O 2 ( a 1 Δ g ) in the total oxygen allowed one to convert CO to CO 2 even at the temperature T =850–900 K in the time of 10 −2 s. The excitation of O 2 and N 2 molecule vibrations is less effective for such a conversion.

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“…For the particular case of methane oxidation, a reduced subset from the entire San Diego mechanism can be used and has been extensively tested and validated for rich conditions [67] and general applications [68]. Another recent detailed scheme for methane combustion requiring 134 reversible reactions and 30 reactive species [69] was also developed by some of the authors.…”

Section: General Background On Combustion Chemistry For Methane Oxidamentioning

confidence: 99%

The combustion mitigation of methane as a non-CO 2 greenhouse gas

Jiang

Mira

Cluff

2018

Progress in Energy and Combustion Science

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ABSTRACT:Anthropogenic emissions of non-CO 2 greenhouse gases such as fugitive methane contribute significantly to global warming. A review of fugitive methane combustion mitigation and utilisation technologies, which are primarily aimed at methane emissions from coal mining activities, with a focus on modelling and simulation of ultra-lean methane oxidation/combustion is presented. The challenges associated with ultra-lean methane oxidation are on the ignition of the ultra-lean mixture and sustainability of the combustion process. There is a lack of fundamental studies on chemical kinetics of ultra-lean methane combustion and reliable kinetic schemes that can be used together with computational fluid dynamics studies to design and develop advanced mitigation systems. Mitigation of methane as a greenhouse gas calls for more efforts on understanding ultra-lean combustion. Recuperative combustion provides a promising means for mitigating ultra-lean methane emissions. Progress is needed on effective methods to ignite and to recuperate and retain heat for oxidation/combustion of the ultra-lean mixtures. Catalysts can be very effective in reducing the temperatures required for oxidation while plasmas may be utilised to assist the ignition, but thermodynamic/aerodynamic limits of burning ultra-lean methane remain unexplored. Further technological developments may be focussed on developing innovative capturing technology as well as technological innovations to achieve effective ignition and sustainable oxidation/combustion.

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A small detailed chemical-kinetic mechanism for hydrocarbon combustion

Cited by 149 publications

References 73 publications

Effect of Hydrogen Content and Dilution on Laminar Burning Velocity and Stability Characteristics of Producer Gas-Air Mixtures

Effect of Hydrogen Content and Dilution on Laminar Burning Velocity and Stability Characteristics of Producer Gas-Air Mixtures

Physics and chemistry of the influence of excited molecules on combustion enhancement

The combustion mitigation of methane as a non-CO 2 greenhouse gas

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