Abstract
Unsaturated ketones are typical oxygenated volatile organic compounds(OVOCs)with high reactivity,and are important precursors in air pollution.The sources of OVOCs are complex and include direct emissions and secondary oxidation formation of VOCs in the atmosphere.2-Cyclohexen-1-one is a widespread substance,and is derived from the industrial catalytic oxidation of cyclohexene.In this paper,we investigated the rate constants of the chemical reactions of 2-cyclohexen-1-one with NO3 radicals,which is(7.25±0.29)×10-15 cm3·molecule-1·s-1 at 298 K and under 1 atm(1 atm=101325Pa).It supplemented the kinetics of NO3 radicals database,and revealed its effects in the nighttime atmosphere.In addition,the reaction products of 2-cyclohexen-1-one with N03 radicals were detected by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS),which revealed a series of nitrate esters in the composition of the secondary organic aerosol(SOA),which may reduce atmospheric visibility.Finally,the possible pathways for the generation of the products were developed.
基金项目
National Natural Science Foundation of China(42130606)
National Natural Science Foundation of China(42022039)
Fund of the Beijing National Laboratory for Molecular Sciences,China(BNLMS-CXXM-202011)
Project of the Youth Innovation Promotion Association of Chinese Academy of Sciences(Y2021013)
NETL
NSTL
万方数据