Uptake kinetics of 3-buten-1-ol,4-penten-1-ol and 3-methyl-3-buten-1-ol into sulfuric acid solutions

• 来源期刊: 科学通报(英文版)
• 学科: 化学
• 年，卷（期）: 2011,（13）
• 页码范围: 1352-1356
• 页数: 5页
• 分类号: O647.3
• 语种: 中文

摘要

Unsaturated alcohols are important components in complex mixtures of oxygenated volatile organic compounds,and play a significant role in atmospheric chemistry.The uptake kinetics of 3-buten-1-ol (BO31),4-penten-1-ol (PO41) and 3-methyl3-buten-1-ol (MBO331) into 20 wt%-80 wt% H2SO4 solutions were studied,using a rotated wetted-wall reactor coupled to a differentially pumped single-photon ionization time of flight mass spectrometer (SPI-TOFMS).With increasing acidity,the uptake processes changed from reversible to irreversible (reactive).Reactive uptake was observed in 60 wt%-80 wt%,50 wt%-80 wt% and 30 wt%-80 wt% H2SO4 solutions for BO31,PO41 and MBO331,respectively.Reactive uptake coefficients were acquired and are reported here for the first time.Reactivity order followed the trend:BO31<PO41<MBO331.An electrophilic addition mechanism of H2SO4 to the C==C double bond was used to explain this trend.Atmospheric implications were discussed,based on the reactive uptake coefficients.This heterogeneous reaction with sulfuric acid aerosols may be a potential degradation pathway of unsaturated alcohols,and should not be neglected.