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Title: Experimentally determined Henry's Law coefficients of phenol, 2-methylphenol and 2-nitrophenol in the temperature range 281-302 K
Authors: Harrison, Mark A J
Cape, J Neil
Heal, Mathew R
Issue Date: 2002
Citation: Harrison, M. A. J., Cape, J. N. and Heal, M. R. (2002) Experimentally determined Henry's law coefficient of phenol, 2-methylphenol and 2-nitrophenol in the temperature range 281-302 K, Atmos. Environ. 36, 1843-1851.
Publisher: Elsevier
Abstract: The Henry’s Law coefficient is a key physical parameter in the partitioning, and hence environmental fate, of a chemical species between air and water. Despite the acknowledged polluting potential of phenol, 2-methylphenol (o-cresol) and 2-nitrophenol, there is extremely poor agreement in the literature of their Henry’s law coefficients and, in particular, no apparent systematic measurement of the variation with temperature. Here a temperature controlled column-stripping method was employed to determine the Henry's Law coefficients for these compounds over the temperature range 281-302 K. Coefficients were derived from regression fits to the observed rates of loss from the liquid phase as a function of column depth in order explicitly to take account of potential non-attainment of equilibrium between liquid and gas phases. Temperature dependent expressions summarising the Henry's Law coefficient of phenol, o-cresol and 2-nitrophenol over the stated temperature range are ln H (/ M atm-1) = 5850/T - 11.6, ln H (/ M atm-1) = 6680/T - 15.4 and ln H (/ M atm-1) = 6270/T - 16.6, respectively (to within 15% of all measured values in this work). A thorough comparison with previous literature-published values has been undertaken.
Keywords: partitioning
aqueous solubility
physical chemistry
Appears in Collections:Chemistry publications

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