Solubility of hydrogen in heavy n-alkanes: Experiments and saft modeling
New experimental measurements on the solubility of hydrogen in several normal alkanes, ranging from decane and up to hexatetracontane, are presented. Data cover a temperature range from 280 K to 450 K, and pressures up to 16 MPa were applied. Hydrogen solubilities of up to 30 mol % were measured. Th...
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Published in | AIChE journal Vol. 49; no. 12; pp. 3260 - 3269 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.12.2003
Wiley Subscription Services American Institute of Chemical Engineers |
Subjects | |
Online Access | Get full text |
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Summary: | New experimental measurements on the solubility of hydrogen in several normal alkanes, ranging from decane and up to hexatetracontane, are presented. Data cover a temperature range from 280 K to 450 K, and pressures up to 16 MPa were applied. Hydrogen solubilities of up to 30 mol % were measured. These mixtures are described through a molecular‐based equation of state based on the statistical associating fluid theory (SAFT). In the SAFT approach, all the compounds are modeled as homonuclear chains of united‐atom sites interacting through a Lennard‐Jones potential. Optimized values for the chain length, Lennard‐Jones diameter, and dispersive energy characterize the hydrogen molecule. In the case of n‐alkanes, a correlation for these molecular parameters is used. Two additional parameters, independent of the thermodynamic variables, were fitted to the experimental data of a single isopleth for each particular mixture. The agreement between the measured and predicted solubilities is excellent (overall AAD<1.5%) in all the thermodynamic range, and does not significantly worsen as the molecular weight of the compound increases. |
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Bibliography: | istex:9AACABAB144B20D84E34865F5232BFB556AC5E3A ark:/67375/WNG-5C66PQ84-S ArticleID:AIC690491225 |
ISSN: | 0001-1541 1547-5905 |
DOI: | 10.1002/aic.690491225 |