The atmospheric multiphase oxidation of acetone

挥发性有机化合物（VOCs）的大气转化导致对流层水相中一元和二元羧酸的形成和积累。一些重要的体系如丙酮被OH自由基氧化的水相体系仍表现出相当大的不确定性，目前的对流层多相模式不能完全再现实验室结果。即丙酮及其稳定的氧化产物，通过改善电流来提高颗粒相中有机酸的浓度此外，需要准确的氧化机制描述来评估长寿命的初级和次级含氧化合物（例如丙酮）对对流层上部的化学性质的影响，因为这些化合物将成为该区域HOX自由基和过氧酰基硝酸盐的主要来源，影响对流层上部的氧化能力。打算研究以下体系：（a）丙酮，（B）羟基丙酮和（c）丙酮醛，（B）和（c）在丙酮氧化后形成。

The atmospheric conversion of volatile organic compounds (VOCs) results in the formation and accumulation of mono- and di-carboxylic acids in the tropospheric aqueous phase. Important systems such as the aqueous phase oxidation of acetone by OH radical still show considerable uncertainties, current tropospheric multiphase models cannot fully reproduce laboratory results.The project proposed here intends to evaluate the possible contribution of the oxidation of oxygenated organic compounds, i.e. acetone and its stable oxidation products to the concentration of organic acids in the particle phase through the improvement of the current models with more detailed oxidation pathways.Further, an accurate oxidation mechanism description is required for an assessment of the impact of long-lived primary and secondary oxygenated compounds such as acetone on the chemistry of the upper troposphere, since these compounds will provide a major source of HOX radicals and peroxyacyl nitrates in this region with consequences on the oxidising capacity of the upper troposphere.The proposed project intends to study the following systems: (a) acetone, (b) hydroxyacetone and (c) methylglyoxal, (b) and (c) are being formed following acetone oxidation.