Diffusion Coefficients of CO2 and N2 in Water at Temperatures between 298.15 K and 423.15 K at Pressures up to 45 MPa

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• 作者：Shane P. Cadogan ; Geoffrey C. Maitland ; J. P. Martin Trusler
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：February 13, 2014
• 年：2014
• 卷：59
• 期：2
• 页码：519-525
• 全文大小：375K
• ISSN：1520-5134

文摘

We report measurements of the diffusion coefficients of CO<sub>2sub> and N<sub>2sub> in pure water at temperatures between (298.15 and 423.15) K and pressures between (15 and 45) MPa. The measurements were made by the Taylor dispersion method and have a standard relative uncertainty of 2.3 %. The results were found to be essentially independent of pressure over the range investigated and a simple relation, based on the Stokes鈥揈instein equation, is proposed to correlate the experimental data. Some experimental difficulties arising in the measurement of the diffusivities of slightly soluble acid-gas solutes such as CO<sub>2sub> in water are also discussed.