title: [Uptake of 3-methyl-3-buten-1-ol into aqueous mixed solution of sulfuric acid and hydrogen peroxide].
abstract: Multiphase acid-catalyzed oxidation with hydrogen peroxide (H2O2) has been suggested recently to be a potential route to SOA formation, but the kinetics and chemical mechanism of this process have not been well-known yet. In this work, the uptake of 3-methyl-3-buten-1-ol (MBO331) into aqueous mixed solutions of H2O2, and sulfuric acid (H2SO4) was performed using a rotated wetted-wall reactor coupled to a VUV single-photon ionization time of flight mass spectrometer (VUV-SPI-TOFMS). The reactive uptake coefficients (gamma) were acquired for the first time and the reaction pathways were deduced according to products information. The uptake of MBO331 into H2SO4/H2O2 was fast, resulting in gamma reaching 2.52 x 10(-4)-1.05 x 10(-2) for 40%-60% H2SO4. Acetaldehyde, acetone and 3-methyl-3, 4-expoxybutane-1-ol were suggested as gas-phase products in this process. 3-methyl-3,4-expoxybutane-1-ol can transform into polyhydroxy compounds while the further reactions of the carbonyl products can occur in acidic solution, which may play a role in SOA formation. Thus, the heterogeneous acid-catalyzed oxidation of MBO331 with H2O2 might be a significant contributor to SOA loading.
authors.affiliation: State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. wangth@iccas.ac.cn
authors.forename: Tian-He
authors.initials: TH
authors.lastname: Wang
authors.forename: Ze
authors.initials: Z
authors.lastname: Liu
authors.forename: Mao-Fa
authors.initials: MF
authors.lastname: Ge
authors.forename: Wei-Gang
authors.initials: WG
authors.lastname: Wang
mesh_terms: D000336:Aerosols / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D000439:Pentanols / Q000737:chemistry*; D012996:Solutions; D013464:Sulfuric Acids / Q000737:chemistry*
chemical_list: D000336:Aerosols; D009930:Organic Chemicals; D000439:Pentanols; D012996:Solutions; D013464:Sulfuric Acids; D006861:Hydrogen Peroxide; C033158:sulfuric acid; C027250:3-hydroxy-3-methylbutene