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Heterogeneous Interactions of Acetaldehyde and Sulfuric AcidThe uptake of acetaldehyde [CH3CHO] by aqueous sulfuric acid has been studied via Knudsen cell experiments over ranges of temperature (210-250 K) and acid concentration (40-80 wt. %) representative of the upper troposphere. The Henry's law constants for acetaldehyde calculated from these data range from 6 x 10(exp 2) M/atm for 40 wt. % H2SO4 at 228 K to 2 x 10(exp 5) M/atm for 80 wt. % H2SO4 at 212 K. In some instances, acetaldehyde uptake exhibits apparent steady-state loss. The possible sources of this behavior, including polymerization, will be explored. Furthermore, the implications for heterogeneous reactions of aldehydes in sulfate aerosols in the upper troposphere will be discussed.
Document ID
20040021350
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Michelsen, R. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Ashbourn, S. F. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Iraci, L. T.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Inorganic, Organic And Physical Chemistry
Meeting Information
Meeting: 22nd Annual American Association for Aerosol Research
Location: Anaheim, CA
Country: United States
Start Date: October 21, 2003
End Date: October 24, 2003
Funding Number(s)
PROJECT: RTOP 622-67-21-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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