Physics and chemistry of the influence of excited molecules on combustion enhancement
Physics and chemistry of the influence of excited molecules on combustion enhancement
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DOI：
10.1098/rsta.2014.0341
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
A. Starik;Boris I. Loukhovitski;A. Sharipov;N. Titova
中科院分区：
文献类型：
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作者：
A. Starik;Boris I. Loukhovitski;A. Sharipov;N. Titova
本文详细分析了H2−O2、CO-O2和CH 4 −O2反应体系中存在单线态氧分子O2（a1Δg）时的动力学过程，以及放电过程中氧分子的活化对H2−O2和CH 4 −O2混合物点火加速的影响。CO氧化的可能性，由于激发O2和N2分子的振动和产生单线态氧分子的加剧也被认为是。结果表明，加速点火的效果强烈依赖于约化电场，因此，放电等离子体的组成，以及在氧燃料系统中的链机制发展的功能。结果表明，无论是在湿空气中还是在空气中烃类燃烧产物中，强化CO氧化的最有效途径是放电产生O2（a1Δg）分子。计算表明，即使在温度T=850-900 K下，总氧中存在1%的O2（a1Δg）也可以在10 - 2 s的时间内将CO转化为CO2。O2和N2分子振动的激发对于这样的转换不太有效。
The paper addresses detailed analysis of kinetic processes in the H2−O2, CO−O2 and CH4−O2-reactive systems upon the presence of singlet oxygen molecules O2(a1Δg) and and the influence of the activation of oxygen molecules in electric discharge on the acceleration of ignition in the H2−O2 and CH4−O2 mixtures. The possibility of the intensification of CO oxidation due to excitation of O2 and N2 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 O2(a1Δg) molecules by electric discharge. Computations showed that the presence of 1% O2(a1Δg) in the total oxygen allowed one to convert CO to CO2 even at the temperature T=850–900 K in the time of 10−2 s. The excitation of O2 and N2 molecule vibrations is less effective for such a conversion.