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Title: Heterogeneous chemistry of acetone in sulfuric acid solutions: Implications for the upper troposphere

Abstract

The uptake of acetone vapor by liquid sulfuric acid has been investigated over the range of 40--87 wt % H{sub 2}SO{sub 4} and between the temperatures 198 and 300 K. Studies were performed with a flow-tube reactor, using a quadrupole mass spectrometer for detection. At most concentrations studied (40--75 wt %), acetone was physically absorbed by sulfuric acid without undergoing irreversible reaction. However, at acid concentrations at or above 80 wt %, reactive uptake of acetone was observed, leading to products such as mesityl oxide and/or mesitylene. From time-dependent uptake data and liquid-phase diffusion coefficients calculated from molecular viscosity, the effective Henry's law solubility constant (H*) was determined. The solubility of acetone in liquid sulfuric acid was found to increase with increasing acid concentration and decreasing temperature. In the 75 wt % and 230 K range, the value for H* was found to be {approximately}2 x 10{sup 6} M/atm. This value suggests that acetone primarily remains in the gas phase rather than absorbing into sulfate aerosols under atmospheric conditions.

Authors:
; ;
Publication Date:
Research Org.:
California Inst. of Tech., Pasadena, CA (US)
OSTI Identifier:
20013109
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory
Additional Journal Information:
Journal Volume: 103; Journal Issue: 46; Other Information: PBD: 18 Nov 1999; Journal ID: ISSN 1089-5639
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ACETONE; SULFURIC ACID; ECOLOGICAL CONCENTRATION; ATMOSPHERIC CHEMISTRY; PHOTOLYSIS

Citation Formats

Kane, S M, Timonen, R S, and Leu, M T. Heterogeneous chemistry of acetone in sulfuric acid solutions: Implications for the upper troposphere. United States: N. p., 1999. Web. doi:10.1021/jp9926692.
Kane, S M, Timonen, R S, & Leu, M T. Heterogeneous chemistry of acetone in sulfuric acid solutions: Implications for the upper troposphere. United States. https://doi.org/10.1021/jp9926692
Kane, S M, Timonen, R S, and Leu, M T. 1999. "Heterogeneous chemistry of acetone in sulfuric acid solutions: Implications for the upper troposphere". United States. https://doi.org/10.1021/jp9926692.
@article{osti_20013109,
title = {Heterogeneous chemistry of acetone in sulfuric acid solutions: Implications for the upper troposphere},
author = {Kane, S M and Timonen, R S and Leu, M T},
abstractNote = {The uptake of acetone vapor by liquid sulfuric acid has been investigated over the range of 40--87 wt % H{sub 2}SO{sub 4} and between the temperatures 198 and 300 K. Studies were performed with a flow-tube reactor, using a quadrupole mass spectrometer for detection. At most concentrations studied (40--75 wt %), acetone was physically absorbed by sulfuric acid without undergoing irreversible reaction. However, at acid concentrations at or above 80 wt %, reactive uptake of acetone was observed, leading to products such as mesityl oxide and/or mesitylene. From time-dependent uptake data and liquid-phase diffusion coefficients calculated from molecular viscosity, the effective Henry's law solubility constant (H*) was determined. The solubility of acetone in liquid sulfuric acid was found to increase with increasing acid concentration and decreasing temperature. In the 75 wt % and 230 K range, the value for H* was found to be {approximately}2 x 10{sup 6} M/atm. This value suggests that acetone primarily remains in the gas phase rather than absorbing into sulfate aerosols under atmospheric conditions.},
doi = {10.1021/jp9926692},
url = {https://www.osti.gov/biblio/20013109}, journal = {Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory},
issn = {1089-5639},
number = 46,
volume = 103,
place = {United States},
year = {Thu Nov 18 00:00:00 EST 1999},
month = {Thu Nov 18 00:00:00 EST 1999}
}