Investigation of the Role of Bicyclic Peroxy Radicals in the Oxidation Mechanism of Toluene
作者:Adam W. Birdsall、John F. Andreoni、Matthew J. Elrod
DOI:10.1021/jp105467e
日期:2010.10.7
mechanism was shown to have a strong oxygen concentration dependence, presumably due to the central role of the bicyclic peroxy radical in determining the stable product distribution at atmospheric oxygen concentrations. The results also suggest a potential role for bicyclic peroxy radical + HO2 reactions at high HO2/NO ratios. These reactions are postulated to be a source of the inconsistencies between
使用湍流化学电离质谱技术,在不同的氧气,NO和初始OH自由基浓度以及一定范围的总压力下,对由OH引发的甲苯初次氧化产物进行了研究。首次检测到双环过氧自由基中间体,这是主要化学机理(MCM)中用于甲苯大气氧化的关键中间体。甲苯氧化机理显示出强烈的氧浓度依赖性,这可能是由于双环过氧自由基在确定大气氧浓度下稳定产物分布方面的核心作用。结果还表明在高HO 2下双环过氧自由基+ HO 2反应的潜在作用/ NO比率。假定这些反应是环境舱结果与MCM预测之间不一致的根源。