Application of a DSC based vapor pressure method for examining the extent of ideality in associating binary mixtures with narrow boiling range oil cuts as a mixture component

2016 ◽  
Vol 637 ◽  
pp. 24-30 ◽  
Author(s):  
Carmen Siitsman ◽  
Vahur Oja
Keyword(s):  
Vapor Pressure ◽  
Binary Mixtures ◽  
Mixture Component ◽  
Pressure Method ◽  
Boiling Range ◽  
Narrow Boiling Range

Thermodynamics of liquid In-Ga-Zn alloys determined by vapor pressure method

Calphad ◽  
2020 ◽  
Vol 71 ◽  
pp. 102198 ◽  
Author(s):  
Sebastian Kulawik ◽  
Andrzej Zajączkowski ◽  
Adam Dębski ◽  
Władysław Gąsior ◽  
Wojciech Gierlotka
Keyword(s):  
Vapor Pressure ◽  
Pressure Method ◽  
Zn Alloys

Thermodynamics of liquid Ga-Sn-Zn alloys determined by vapor pressure method

2020 ◽  
Vol 300 ◽  
pp. 112310 ◽  
Author(s):  
S. Kulawik ◽  
A. Zajączkowski ◽  
A. Dębski ◽  
W. Gąsior ◽  
W. Gierlotka
Keyword(s):  
Vapor Pressure ◽  
Pressure Method ◽  
Zn Alloys

Correction for loss of CO2 from blood during measurement of osmotic pressure

1978 ◽  
Vol 44 (3) ◽  
pp. 474-478 ◽  
Author(s):  
S. S. Khosla ◽  
A. B. DuBois
Keyword(s):  
Vapor Pressure ◽  
Blood Sample ◽  
Osmotic Pressure ◽  
Freezing Point ◽  
Gas Mixture ◽  
Sample Holder ◽  
Freezing Point Depression ◽  
Pressure Method ◽  
Sample Chamber

During osmolality measurement by the vapor pressure method, exposure of the blood sample to air lowers the blood CO2 content and hence osmolality. A modification of the sample holder of a vapor pressure osmometer is described allowing exposure of the blood sample to a gas mixture with known concentration of CO2 and O2 while inside the closed sample chamber. This restores its CO2 content and hence osmolality. Data are presented comparing the unmodified and modified vapor pressure method with the freezing point depression method. A table was prepared for further correction of osmolality in case the blood's PCO2 differs from that of the gas mixture.

Isothermal Vapor-Liquid Equilibrium Measurement of Isobutanol + Isooctane/N-Heptane Binary Mixtures at Temperatures Range of 303.15-323.15 K

2020 ◽  
Vol 840 ◽  
pp. 501-506
Author(s):  
Ardika Nurmawati ◽  
Rizky Tetrisyanda ◽  
Gede Wibawa
Keyword(s):  
Vapor Pressure ◽  
Binary Mixtures ◽  
Published Data ◽  
Positive Deviation ◽  
Average Absolute Deviation ◽  
Liquid Equilibrium ◽  
Absolute Deviation ◽  
Vapor Liquid Equilibrium ◽  
Mole Fraction Range ◽  
Vapor Liquid

The addition of alcohol as an oxygenated compound in gasoline blends may increase the vapor pressure of gasoline mixture. As a result, the study of vapor-liquid equilibrium for gasoline component and alcohol is necessary. In this study, the vapor-liquid equilibrium of isobutanol – isooctane/n-heptane blends were obtained experimentally at temperatures in the range 303.15 to 323.15 K using modified simple quasi-static ebulliometer. The apparatus was validated by comparing the vapor pressure of pure isobutanol, isooctane, and n-heptane with the published data and giving average absolute deviation (AAD) between experimental and calculated ones with magnitude less than 1.0%. The addition of isobutanol with the mole fraction range from 0.2 to 0.6 would increase the vapor pressure of the isooctane and n-heptane up to 12% and 14% respectively. The vapor pressure of binary mixtures was correlated with the Wilson, Non-random two-liquid (NRTL), and Universal quasi-chemical (UNIQUAC) equations with AAD 1.6%, 1.5%, and 1.7%, respectively for isobutanol + isooctane system and 1.8%, 1.7%, and 2.0%, respectively for isobutanol + n-heptane system. The systems studied show positive deviation from Raoult’s Law.

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