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HONO是大气中OH自由基的重要来源,NO2在黑碳表面可反应生成HONO,因此NO2在黑碳表面的非均相反应引起了人们的关注。目前不同研究小组测量的摄取系数可相差7个数量级,选择不同的摄取系数去评估非均相反应的重要性将得到完全不同的结果。本文在深入分析NO2在黑碳表面反应机理的基础上,从反应体系、黑碳表面性质、反应条件等角度对不同小组测量的摄取系数存在差异的原因进行了分析,为模式中摄取系数的选取提供了依据。
HONO is an important source of OH radicals in the atmosphere. NO2 can generate HONO on the surface of black carbon. Therefore, the heterogeneous reaction of NO2 on the surface of black carbon has aroused people’s attention. At present, different research groups measure uptake coefficients that differ by seven orders of magnitude, and choosing different intake coefficients to assess the importance of heterogeneous reactions will yield completely different results. Based on the in-depth analysis of the reaction mechanism of NO2 on the surface of black carbon, this paper analyzes the reasons for the differences in the intake coefficients measured by different groups from the aspects of the reaction system, the surface properties of black carbon and the reaction conditions. Provided the basis.