Products of the gas-phase reactions of the OH radical with 1-methoxy-2-propanol and 2-butoxyethanol
- Univ. of California, Riverside, CA (United States). Air Pollution Research Center
Glycol ethers are used as solvents and are hence liable to be released to the atmosphere, where they react and contribute to the formation of photochemical air pollution. In this work, products of the gas-phase reactions of the OH radical with 1-methoxy-2-propanol and 2-butoxyethanol in the presence of NO have been investigated at 298 {+-} 2K and 740 Torr total pressure of air by gas chromatography, in situ Fourier transform infrared spectroscopy, and in situ atmospheric pressure ionization tandem mass spectrometry. The products observed from 1-methoxy-2-propanol were methyl formate, methoxyacetone, and acetaldehyde with molar formation yields of 0.59 {+-} 0.05, 0.39 {+-} 0.04, and 0.56 {+-} 0.07, respectively. The products observed and quantified from 2-butoxyethanol were n-butyl formate, 2-hydroxyethyl formate, propanal, 3-hydroxybutyl formate, and an organic nitrate with molar formation yields of 0.57 {+-} 0.05, 0.22 {+-} 0.05, 0.21 {+-} 0.02, 0.07 {+-} 0.03, and 0.10 {+-} 0.03, respectively. An additional product of molecular weight 132, attributed to one or more hydroxycarbonyl products, was also observed from the 2-butoxyethanol reaction by atmospheric pressure ionization mass spectrometry. For both glycol ethers, the majority of the reaction products and reaction pathways are accounted for, and detailed reaction mechanisms are presented which account for the observed products.
- OSTI ID:
- 323751
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 21 Vol. 32; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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