Articles | Volume 17, issue 12
https://doi.org/10.5194/acp-17-7495-2017
https://doi.org/10.5194/acp-17-7495-2017
Research article
 | 
21 Jun 2017
Research article |  | 21 Jun 2017

Experimental determination of Henry's law constants of difluoromethane (HFC-32) and the salting-out effects in aqueous salt solutions relevant to seawater

Shuzo Kutsuna

Related subject area

Subject: Gases | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Anderson, G. K.: A thermodynamic study of the (difluoromethane + water) system, J. Chem. Thermodyn., 43, 1331–1335, https://doi.org/10.1016/j.jct.2011.03.020, 2011.
Boyer, T.P., Antonov, J. I., Baranova, O. K., Coleman, C., Garcia, H. E., Grodsky, A., Johnson, D. R., Locarnini, R. A., Mishonov, A. V., O'Brien, T. D., Paver, C. R., Reagan, J. R., Seidov, D., Smolyar, I. V., and Zweng, M. M.: World Ocean Database 2013, in: NOAA Atlas NESDIS 72, Technical Edn., edited by: Levitus, S., and Mishonov, A., NOAA, Silver Spring, MD, 209 pp., https://doi.org/10.7289/V5NZ85MT, 2013.
Brockbank, S. A., Russon, J. L., Giles, N. F., Rowley, R. L., and Wilding, W. V.: Infinite dilution activity coefficients and Henry's law constants of compounds in water using the inert gas stripping method, Fluid Phase Equil., 348, 45–51, https://doi.org/10.1016/j.fluid.2013.03.023, 2013.
Carpenter, L. J., Reimann, S., Burkholder, J. B., Clerbaux, C., Hall, B. D., Hossaini, R., Laube, J. C., and Yvon-Lewis, S. A.: Ozone-Depleting Substances (ODSs) and Other Gases of Interest to the Montreal Protocol, in: chap. 1, Scientific Assessment of Ozone Depletion: 2014, Global Ozone Research and Monitoring Project 55, World Meteorological Organization, Geneva, Switzerland, 2014.
Clarke, E. C. W. and Glew, D. N.: Evaluation of thermodynamic functions from equilibrium constants, Trans. Faraday Soc., 134, 539–547, https://doi.org/10.1039/TF9666200539, 1965.
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Short summary
We experimentally determined gas-to-water equilibrium coefficients of difluoromethane, a refrigerant HFC-32, in aqueous salt solutions relevant to seawater at 3–39 °C to evaluate what portion of HFC-32 emitted into the atmosphere would be dissolved in the ocean. The portion in the ocean was estimated to be realistically limited to only about 1 % globally; however, in a lower-tropospheric semi-hemisphere (30 °S–90 °S), the portion was estimated to be at least 4 % in winter.
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