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Dew‐point measurements for water in compressed carbon dioxide
Author(s) -
Meyer Christopher W.,
Harvey Allan H.
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14818
Subject(s) - dew point , hygrometer , virial coefficient , gravimetric analysis , dew , carbon dioxide , chemistry , mole fraction , thermodynamics , condensation , saturation (graph theory) , water vapor , humidity , physics , organic chemistry , mathematics , combinatorics
When transporting CO 2 for sequestration, it is important to know the water dew point in order to avoid condensation that can lead to corrosion. A flow apparatus to measure the water content at saturation in a compressed gas has been constructed. A saturator humidifies the flowing gas by equilibrating it with liquid water. Then, a gravimetric hygrometer measures the water mole fraction of the humid gas. Dew‐point data for H 2 O in CO 2 on six isotherms between 10 and 80 °C at pressures from 0.5 to 5 MPa are reported. The uncertainties in water content at the dew point (expanded uncertainty with coverage factor k = 2) are on average 0.3%, significantly smaller than in any previous work. The data have been analyzed to extract the interaction second virial coefficient; the values are consistent with the theoretical estimates of Wheatley and Harvey but have a much smaller uncertainty. Published 2015 American Institute of Chemical Engineers AIChE J , 2015 © 2015 American Institute of Chemical Engineers AIChE J , 61: 2913–2925, 2015