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Gas-phase chemistry of benzyl alcohol: reaction rate constants and products with OH radical and ozone.

Authors
Harrison-JC; Wells-JR
Source
Atmos Environ 2009 Feb; 43(4):798-804
NIOSHTIC No.
20035038
Abstract
A bimolecular rate constant, kOH+Benzyl alcohol, of (28 +/- 7) 10-12 cm3 molecule-1 s-1 was measured using the relative rate technique for the reaction of the hydroxyl radical (OH) with benzyl alcohol, at (297 +/- 3) K and 1 atm total pressure. Additionally, an upper limit of the bimolecular rate constant, kO3+Benzyl alcohol, of approximately 6 10-19 cm3 molecule-1 s-1 was determined by monitoring the decrease in benzyl alcohol concentration over time in an excess of ozone (O3). To more clearly define part of benzyl alcohol's indoor environment degradation mechanism, the products of the benzyl alcohol + OH were also investigated. The derivatizing agents O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) and N,O-bis(trimethylsilyl) trifluoroacetamide (BSTFA) were used to positively identify benzaldehyde, glyoxal and 4-oxopentanal as benzyl alcohol/OH reaction products. The elucidation of other reaction products was facilitated by mass spectrometry of the derivatized reaction products coupled with plausible benzyl alcohol/OH reaction mechanisms based on previously published volatile organic compound/OH gas-phase reaction mechanisms.
Keywords
Quantitative-analysis; Sampling-methods; Air-quality; Indoor-environmental-quality; Chemical-composition; Chemical-properties; Chemical-synthesis; Organic-chemicals; Organic-compounds; Organic-vapors; Gases; Author Keywords: OH rate constant; Ozone rate constant; Benzyl alcohol; Indoor chemistry
Contact
J.R. Wells, Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505
CODEN
AENVEQ
Publication Date
20090201
Document Type
Journal Article
Email Address
ozw0@cdc.gov
Fiscal Year
2009
NTIS Accession No.
NTIS Price
Issue of Publication
4
ISSN
1352-2310
NIOSH Division
HELD
Priority Area
Services
Source Name
Atmospheric Environment
State
WV
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