Diffusion coefficients of N2O and H2 in water at temperatures between 298.15 and 423.15 K with pressures up to 30 MPa
File(s)
Published version
Author(s)
Wang, Sijia
Zhou, Tong
Pan, Ziqing
Trusler, JP Martin
Type
Journal Article
Abstract
The diffusion coefficients of CO2 and H2 in aqueous solutions are important in numerous processes including carbon capture, geological carbon storage, and reservoir storage of hydrogen. As CO2 is reactive in some aqueous solutions, especially aqueous amine solvents for carbon capture, N2O is frequently studied as a surrogate. In this work, the Taylor dispersion technique was used to determine the diffusion coefficients of N2O and H2 at high dilution in water at temperatures between 298.15 and 423.15 K and at pressures up to 30 MPa, with a standard relative uncertainty of 1.6%. The new data are intended to resolve significant discrepancies in the literature. The results confirm that temperature is the most important controlling factor and that the diffusion coefficients are nearly independent of pressure in the region studied. The experimental data were correlated using the Stokes–Einstein equation, with average absolute relative deviations of 0.5% for both systems.
Date Issued
2023-06-08
Date Acceptance
2023-05-15
Citation
Journal of Chemical and Engineering Data, 2023, 68 (6), pp.1313-1319
ISSN
0021-9568
Publisher
American Chemical Society
Start Page
1313
End Page
1319
Journal / Book Title
Journal of Chemical and Engineering Data
Volume
68
Issue
6
Copyright Statement
Copyright © 2023 The Authors. Published by American Chemical Society. This work is published under a CC BY licence.
License URL
Identifier
http://dx.doi.org/10.1021/acs.jced.3c00085
Subjects
0904 Chemical Engineering
Chemical Engineering
Publication Status
Published
Date Publish Online
2023-05-25