10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Clustering Process of Glyoxylic Acid Involving Gas-phase Hydration Reaction: Implications for the Atmospheric Models
Ling Liu, Oona Kupiainen-Määttä, XIUHUI ZHANG, Beijing Institute of Technoloy
Abstract Number: 1679 Working Group: Aerosol Chemistry
Abstract Atmospheric aerosol nucleation mechanism is important but still not clear, especially different reactivities of precursors can induce various chemical reactions during the clustering process besides the cluster formation through hydrogen bond. However, chemical reactions are not fully considered in most of the nucleation processes. Herein, the clustering process of glyoxylic acid (GA), the most abundant oxocarboxylic acids in the atmosphere, involving gas-phase hydration reaction are studied by Density Functional Theory combined with Atmospheric Clusters Dynamic Code. The hydration reaction of GA can occur in clustering process with the conversion ratio up to 85%, and the product can further participate in the clustering process. GA with its hydration reaction can enhance cluster formation rate. The differences in cluster structure and property induced by hydration reaction lead to the discrepancies in cluster formation rates and pathways. These results shed some light on the discrepancy between atmospheric models and field measurements and have important implications for atmospheric model improvement.