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首页> 外文期刊>Atmospheric chemistry and physics >The oleic acid-ozone heterogeneous reaction system: products, kinetics, secondary chemistry, and atmospheric implications of a model system – a review
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The oleic acid-ozone heterogeneous reaction system: products, kinetics, secondary chemistry, and atmospheric implications of a model system – a review

机译：油酸-臭氧非均相反应系统：模型系统的产物，动力学，次级化学和大气影响-回顾

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摘要

The heterogeneous processing of organic aerosols by trace oxidants has manyimplications to atmospheric chemistry and climate regulation. This reviewcovers a model heterogeneous reaction system (HRS): the oleic acid-ozoneHRS and other reaction systems featuring fatty acids, and their derivatives.The analysis of the commonly observed aldehyde and organic acid products ofozonolysis (azelaic acid, nonanoic acid, 9-oxononanoic acid, nonanal) isdescribed. The relative product yields are noted and explained by theobservation of secondary chemical reactions. The secondary reaction productsarising from reactive Criegee intermediates are mainly peroxidic, notablysecondary ozonides and α-acyloxyalkyl hydroperoxide oligomers andpolymers, and their formation is in accord with solution and liquid-phaseozonolysis. These highly oxygenated products are of low volatility andhydrophilic which may enhance the ability of particles to act as cloudcondensation nuclei (CCN). The kinetic description of this HRS is criticallyreviewed. Most kinetic studies suggest this oxidative processing is either anear surface reaction that is limited by the diffusion of ozone or a surfacebased reaction. Internally mixed particles and coatings represent the nextstage in the progression towards more realistic proxies of troposphericorganic aerosols and a description of the products and the kineticsresulting from the ozonolysis of these proxies, which are based on fattyacids or their derivatives, is presented. Finally, the main atmosphericimplications of oxidative processing of particulate containing fatty acidsare presented. These implications include the extended lifetime ofunsaturated species in the troposphere facilitated by the presence ofsolids, semi-solids or viscous phases, and an enhanced rate of ozone uptakeby particulate unsaturates compared to corresponding gas-phase organics.Ozonolysis of oleic acid enhances its CCN activity, which implies thatoxidatively processed particulate may contribute to indirect forcing ofradiation.
机译：痕量氧化剂对有机气溶胶的异质处理对大气化学和气候调节有许多启示。这篇综述揭示了一个模型异质反应系统（HRS）：油酸-臭氧HRS和其他以脂肪酸及其衍生物为特征的反应系统。分析了臭氧分解中常见的醛和有机酸产物（壬二酸，壬酸，9-氧代壬酸）酸，壬醛）。通过观察次级化学反应来记录和解释相对产物的产率。由反应性Criegee中间体产生的次级反应产物主要是过氧化物，尤其是仲臭氧化物和α-酰氧基烷基氢过氧化物低聚物和聚合物，其形成符合溶液和液相臭氧分解的要求。这些高度氧化的产品具有低挥发性和亲水性，可以增强颗粒充当云凝结核（CCN）的能力。该HRS的动力学描述已得到严格审查。大多数动力学研究表明，这种氧化过程要么是受臭氧扩散限制的表面反应，要么是基于表面的反应。内部混合的颗粒和涂层代表了对流层有机气溶胶向更现实的代理发展的下一阶段，并给出了对这些代理的产物和动力学的描述，这些产物是基于脂肪酸或其衍生物的臭氧分解。最后，介绍了含脂肪酸颗粒氧化处理的主要大气意义。这些影响包括：由于存在固体，半固体或粘性相而促进了对流层中不饱和物质的寿命延长，与相应的气相有机物相比，颗粒不饱和物对臭氧的吸收速率增加。油酸的臭氧分解作用增强了其CCN活性，这意味着经过氧化处理的颗粒可能有助于间接强迫辐射。

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