Enhanced Solubility of Hydrogen in CO2-Expanded Liquids
Vapor−liquid equilibrium (VLE) data for the systems CO2/H2/acetonitrile, CO2/H2/acetone, and CO2/H2/methanol were determined at 40 °C and 25, 60, and 90 bar. A variable volume view cell was used coupled with an online gas chromatograph. The solubility of H2 in expanded solvents was improved by the p...
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Published in | Industrial & engineering chemistry research Vol. 47; no. 3; pp. 570 - 576 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
06.02.2008
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Subjects | |
Online Access | Get full text |
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Summary: | Vapor−liquid equilibrium (VLE) data for the systems CO2/H2/acetonitrile, CO2/H2/acetone, and CO2/H2/methanol were determined at 40 °C and 25, 60, and 90 bar. A variable volume view cell was used coupled with an online gas chromatograph. The solubility of H2 in expanded solvents was improved by the presence of CO2 but not significantly; the solubility is less than one can achieve with pure H2 at the same total pressure. Nevertheless, CO2 does improve H2 solubility in all three solvents at the conditions studied, even though the H2 solubility enhancement by CO2 is very modest. The Peng−Robinson equation of state predicted the ternary VLE remarkably well using only binary interaction parameters. |
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Bibliography: | istex:1590D3A843C6F036086DEAED1AA3C95A897317BC ark:/67375/TPS-W7DL272H-6 |
ISSN: | 0888-5885 1520-5045 |
DOI: | 10.1021/ie070105b |