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首页> 外文期刊>Energy & fuels >A Comprehensive Experimental and Kinetic Study of Laminar Flame Characteristics of H_2 and CO Addition to Oxygenated Gasoline
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A Comprehensive Experimental and Kinetic Study of Laminar Flame Characteristics of H_2 and CO Addition to Oxygenated Gasoline

机译：氧化汽油的H_2和CO加的层状火焰特性的综合实验和动力学研究

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摘要

Following stringent regulations enforced by environmental regulatory authorities, various steps have been recently implemented to ensure the clean combustion of gasoline with minimum emissions by including additives to gasoline. This kinetic and experimental study has been conducted to explore the effect of H-2 and CO addition to Halterman gasoline at stoichiometric conditions of 358 K and 1 bar. Two different mechanisms, a gasoline surrogate (iso-octane, n-heptane, toluene, and ethanol), LLNL, and a KAUST TPRFE (primary reference fuel, toluene, and ethanol), were used to provide a detailed comparative kinetic understanding of gasoline. Via a spherical flame propagating in a constant-volume combustion chamber, the unstretched, adiabatic laminar burning velocity, S-L(o), was measured. H-2 and CO were added (as unitary and binary additives) to the Haltermann gasoline, in proportions of 1, 2.5, 5, and 10% by mass. Adding hydrogen enhanced the S-L(o) significantly, while CO addition had only a slight effect on S-L(o). The maximal mole fractions of OH and H were increased with the H-2 addition, while adding CO raised the O radical peak mole fraction. A strong correlation between S-L(o) and the sum of the O, H, and OH peak mole fractions was evident. The OH radical was identified to be a kinetics indicator for S-L(o) of gasoline/air mixtures at these conditions; a higher fraction of ethanol in Haltermann gasoline was the precursor for high OH concentration. The addition of a binary additive (10% H-2-10% CO) significantly enhanced the consumption of iso-octane compared to other fuel species, strengthening the H-abstraction of iso-octane, 99% compared to 71% with neat Haltermann gasoline. The simulated flame speed showed that the primary chain branching reaction (H + O-2 = O + OH) rate was much higher for the LLNL mechanism than for the KAUST-TPRFE mechanism, and thus, the LLNL overpredicted S-L(o) for the Haltermann gasoline surrogate.
机译：遵循环境监管机构强制执行的严格规定，最近已经实施了各种步骤，以确保汽油的清洁燃烧，并通过将添加剂与汽油添加到最低排放。已经进行了这种动力学和实验研究，以探讨H-2和Co补充在358k和1巴的化学计量条件下HALTERMAN汽油的影响。两种不同的机制，汽油替代（异辛烷，正庚烷，甲苯和乙醇），LLN1和KAURT TPRFE（初级参考燃料，甲苯和乙醇），用于提供对汽油的详细的对比感知。通过在恒定体积燃烧室中传播的球形火焰，测量未拉伸的绝热层状燃烧速度S-L（O）。将H-2和CO加入到Haltermann汽油中（作为单一的和二元添加剂），比例为1,2.5,5和10质量％。添加氢气显着增强S-L（O），而Co加入对S-L（O）略有效果。通过H-2添加增加OH和H的最大摩尔级分，同时添加CO升高了O基峰摩尔级分。 S-L（O）与O，H和OH峰值摩尔分数之间的良好相关性是显而易见的。将OH自由基鉴定为在这些条件下为汽油/空气混合物的S-L（O）的动力学指示剂; Haltermann汽油中乙醇的更高级数是高OH浓度的前体。与其他燃料种类相比，加入二元添加剂（10％H-2-10％CO）显着提高了异辛烷的消耗，加强了异辛烷的H次抽象，99％，而齐全的Haltermann为71％汽油。模拟的火焰速度显示LLNL机制的主要链支化反应（H + O-2 = O + OH）速率远高于KAUST-TPRFE机制，因此，LLNL过度预测的SL（O） Haltermann汽油代理。

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  • 来源
    《Energy & fuels》 |2021年第17期|14063-14076|共14页
  • 作者

    Khan Farha; Elbaz Ayman M.; Badra Jihad; Costanzo Vincent; Roberts William L.;

  • 作者单位

    King Abdullah Univ Sci & Technol KAUST Clean Combust Res Ctr Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol KAUST Clean Combust Res Ctr Thuwal 239556900 Saudi Arabia|Helwan Univ Fac Engn Cairo 11231 Egypt;

    Saudi Aramco Res & Dev Dhahran 31311 Eastern Provinc Saudi Arabia;

    Aramco Res Ctr Novi MI 48377 USA;

    King Abdullah Univ Sci & Technol KAUST Clean Combust Res Ctr Thuwal 239556900 Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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