《Fundamental Time Scales Governing Organic Aerosol Multiphase Partitioning and Oxidative Aging》 was written by Zhang, Haofei; Worton, David R.; Shen, Steve; Nah, Theodora; Isaacman-Van Wertz, Gabriel; Wilson, Kevin R.; Goldstein, Allen H.. Recommanded Product: 591-70-8 And the article was included in Environmental Science & Technology on August 18 ,2015. The article conveys some information:
Traditional descriptions of organic aerosol (OA) gas-particle partitioning rely solely on thermodn. properties (e.g., volatility). Under realistic conditions, where phase partitioning is dynamic rather than static, OA transformation involves the interplay of multi-phase partitioning with oxidative aging. A key challenge is quantifying fundamental time scales for semi-volatile OA evaporation and oxidation This work used isomer-resolved product measurements of a series of normal alkanes (C18, 20, 22, 24) to distinguish between gas-phase and heterogeneous oxidation products formed by reaction with OH-. Product isomer distributions, when combined with evaporation and oxidation kinetics measurements, enable a quant. description of multi-phase time scales to be simulated using a single-particle kinetic model. Multi-phase partitioning and oxidative transformation of semi-volatile normal alkanes under laboratory conditions is largely controlled by the particle phase state, since heterogeneous oxidation and evaporation time scales occur on competing time scales (on the order of 10-1 h). This is in contrast to atm. conditions where heterogeneous oxidation time scales are expected to be much longer (on the order of 102 h), with gas-phase oxidation being the dominant process regardless of evaporation kinetics. Results demonstrated the dynamic nature of OA multi-phase partitioning and oxidative aging and showed fundamental time scales of these processes are crucial to reliably extend laboratory measurements of OA phase partitioning and aging to the atm. The experimental part of the paper was very detailed, including the reaction process of Octadecan-9-ol(cas: 591-70-8Recommanded Product: 591-70-8)
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Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts