Products of the gas-phase reactions of 1,3-butadiene with OH and NO{sub 3} radicals
1,3-Butadiene is emitted into the atmosphere from a number of sources including combustion sources and is listed in the US as a hazardous air pollutant. In the atmosphere, 1,3-butadiene reacts with OH radicals, NO{sub 3} radicals, and O{sub 3} with the dominant tropospheric removal processes being daytime reaction with the OH radical and nighttime reaction with the NO{sub 3} radical. The authors have used gas chromatography, in situ Fourier transform infrared (FT-IR) absorption spectroscopy, and in situ atmospheric pressure ionization tandem mass spectrometry (API-MS) to identify and quantify the products formed from the reactions of 1,3-butadiene with OH radicals (in the presence of NO) and NO{sub 3} radicals. Acrolein, formaldehyde, and furan were identified and quantified from the OH radical-initiated reaction, with formation yields of 0.58 {+-} 0.04, 0.62 {+-} 0.05, and 0.03--0.04, respectively. Organic nitrates were observed by FT-IR spectroscopy with an estimated yield of 0.07 {+-} 0.03, and the API-MS analyses indicated that these organic nitrates are mainly the hydroxynitrate HOCH{sub 2}CH=CHCH{sub 2}ONO{sub 2} and/or its isomers. API-MS analyses showed the formation of a hydroxycarbonyl with the formula C{sub 4}H{sub 6}O{sub 2}, attributed to HOCH{sub 2}CH=CHCHO and/or its isomers. The major products of the NO{sub 3} radical-initiated reaction were organic nitrates; the API-MS analyses indicated the formation of acrolein, 1,2-epoxy-3-butene, and unsaturated C{sub 4}-hydroxycarbonyls, hydroxynitrates, carbonyl nitrates, and nitrooxyhydroperoxides. Acrolein, HCHO, and furan were again quantified by gas chromatographic and FT-IR analyses. The data is compared with previous literature studies, and detailed reaction mechanisms are presented and discussed.
- Research Organization:
- Univ. of California, Riverside, CA (US)
- OSTI ID:
- 20000732
- Journal Information:
- Environmental Science and Technology, Vol. 33, Issue 20; Other Information: PBD: 15 Oct 1999; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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