Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-4053-2017 |
Technical note: Conversion of isoprene hydroxy hydroperoxides (ISOPOOHs) on metal environmental simulation chamber walls | |
Bernhammer, Anne-Kathrin1,2; Breitenlechner, Martin1,3,4; Keutsch, Frank N.3,4; Hansel, Armin1,2 | |
2017-03-24 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; USA |
英文摘要 | Sources and sinks of isoprene oxidation products from low-NO x isoprene chemistry have been studied at the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber with a custom-built selective reagent ion time-offlight mass spectrometer (SRI-ToF-MS), which allows quantitative measurement of isoprene hydroxy hydroperoxides (ISOPOOHs). The measured concentrations of the main oxidation products were compared to chemical box model simulations based on the Leeds Master Chemical Mechanism (MCM) v3.3. The modeled ISOPOOH concentrations are a factor of 20 higher than the observed concentrations, and methyl vinyl ketone (MVK) and methacrolein (MACR) concentrations are up to a factor of 2 lower compared to observations, despite the artifact-free detection method. Addition of catalytic conversion of 1,2-ISOPOOH and 4,3-ISOPOOH to methyl vinyl ketone (MVK) and methacrolein (MACR) on the stainless-steel surface of the chamber to the chemical mechanism resolves the discrepancy between model predictions and observation. This suggests that isoprene chemistry in a metal chamber under low-NO x conditions cannot be described by a pure gas phase model alone. Biases in the measurement of ISOPOOH, MVK, and MACR can be caused not only intra-instrumentally but also by the general experimental setup. The work described here extends the role of heterogeneous reactions affecting gas phase composition and properties from instrumental surfaces, described previously, to general experimental setups. The role of such conversion reactions on real environmental surfaces is yet to be explored. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397935700005 |
WOS关键词 | VOLATILE ORGANIC-COMPOUNDS ; TROPOSPHERIC DEGRADATION ; ATMOSPHERIC CHEMISTRY ; REACTIVE UPTAKE ; SULFURIC-ACID ; OXIDATION ; AEROSOL ; PHASE ; MECHANISM ; METHACROLEIN |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19479 |
专题 | 地球科学 |
作者单位 | 1.Univ Innsbruck, Inst Ion & Appl Phys, A-6020 Innsbruck, Austria; 2.IONICON Analyt GmbH, A-6020 Innsbruck, Austria; 3.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 4.Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Bernhammer, Anne-Kathrin,Breitenlechner, Martin,Keutsch, Frank N.,et al. Technical note: Conversion of isoprene hydroxy hydroperoxides (ISOPOOHs) on metal environmental simulation chamber walls[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(6). |
APA | Bernhammer, Anne-Kathrin,Breitenlechner, Martin,Keutsch, Frank N.,&Hansel, Armin.(2017).Technical note: Conversion of isoprene hydroxy hydroperoxides (ISOPOOHs) on metal environmental simulation chamber walls.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(6). |
MLA | Bernhammer, Anne-Kathrin,et al."Technical note: Conversion of isoprene hydroxy hydroperoxides (ISOPOOHs) on metal environmental simulation chamber walls".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.6(2017). |
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