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首页> 外文期刊>Combustion Science and Technology >Experimental and Modeling Study of Propanal/H_2/O_2/Ar Flames at Low Pressure
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Experimental and Modeling Study of Propanal/H_2/O_2/Ar Flames at Low Pressure

机译：低压丙烷/ H_2 / O_2 / Ar火焰的实验与模型研究

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Propanal (C2H5CHO) is a crucial intermediate oxygenated species in hydrocarbons and oxygenated fuels combustion, thus motivating a better understanding of its kinetics. In this study, two premixed at flames of propanal/hydrogen/oxygen/argon, a stoichiometric and a rich, are stabilized at low pressure (27 mbar) on a burner. Species mole fraction profiles have been measured by molecular beam mass spectrometry (MBMS) for the reactants, products, and intermediate species: C2H5CHO (propanal), H-2, O-2, Ar, H, OH, HO2, CO, CO2, H2O, CH3, CH4, CH2O (formaldehyde), CH2CO (ketene), CH3CO (acetyl radical), C2H2 (acetylene), C2H4 (ethylene), and C2H6 (ethane). The mechanism from the Universite catholique de Louvain (UCL) has been extended to the kinetics of propanal and its reliability has been validated against both of these propanal flames, at low pressure and in the temperature range up to 1530 K. According to the model, the main propanal consumption channel produces the ethyl radical (C2H5). This last radical is responsible for the hydrocarbons formation through C2H5 -> C2H4 -> C2H3 -> C2H2; and also for the oxygenated compounds production through C2H5 -> CH3CHO -> CH3CO -> CH2CO -> CH2CHO. The presence of hydrogen, as a reactant, promotes the propanal consumption with the H radicals.
机译：丙醛（C2H5CHO）是碳氢化合物和含氧燃料燃烧中的关键中间含氧物质，因此激发了对其动力学的更好理解。在这项研究中，两种在丙烷/氢气/氧气/氩气火焰下预混合的化学计量和浓混合气在低压（27毫巴）下稳定在燃烧器上。通过分子束质谱（MBMS）测量了反应物，产物和中间物种的物种摩尔分数分布图：C2H5CHO（丙醛），H-2，O-2，Ar，H，OH，HO2，CO，CO2， H2O，CH3，CH4，CH2O（甲醛），CH2CO（乙烯酮），CH3CO（乙酰基），C2H2（乙炔），C2H4（乙烯）和C2H6（乙烷）。卢瓦尔大学天主教会（UCL）的机理已扩展到丙烷的动力学，并且已经在低压和高达1530 K的温度范围内针对这两种丙烷火焰验证了其可靠性。根据该模型，主要的丙烷消耗通道产生乙基（C2H5）。最后一个自由基负责通过C2H5-> C2H4-> C2H3-> C2H2形成烃；以及通过C2H5-> CH3CHO-> CH3CO-> CH2CO-> CH2CHO生产含氧化合物。氢作为反应物的存在促进了丙炔与氢自由基的消耗。

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