Speed-of-Sound Measurements and a Fundamental Equation of State for Propylene Glycol

2021 ◽  
Vol 50 (2) ◽  
pp. 023105
Author(s):  
Tim Eisenbach ◽  
Christian Scholz ◽  
Roland Span ◽  
Diego Cristancho ◽  
Eric W. Lemmon ◽  
...  
Keyword(s):  
Equation Of State ◽  
Propylene Glycol ◽  
Speed Of Sound ◽  
Fundamental Equation ◽  
Fundamental Equation Of State

scholarly journals Thermodynamic Properties of Methyl Diethanolamine

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Tobias Neumann ◽  
Elmar Baumhögger ◽  
Roland Span ◽  
Jadran Vrabec ◽  
Monika Thol
Keyword(s):  
Experimental Data ◽  
Liquid Phase ◽  
Equation Of State ◽  
Thermodynamic Properties ◽  
Speed Of Sound ◽  
Fundamental Equation ◽  
Helmholtz Energy ◽  
Maximum Pressure ◽  
Temperature Range ◽  
Fundamental Equation Of State

AbstractThe homogeneous density of the liquid phase is experimentally investigated for methyl diethanolamine. Data are obtained along five isotherms in a temperature range between 300 K and 360 K for pressures up to 95 MPa. Two different apparatuses are used to measure the speed of sound for the temperatures between 322 K and 450 K with a maximum pressure of 95 MPa. These measurements and literature data are used to develop a fundamental equation of state for methyl diethanolamine. The model is formulated in terms of the Helmholtz energy and allows for the calculation of all thermodynamic properties in gaseous, liquid, supercritical, and saturation states. The experimental data are represented within their uncertainties. The physical and extrapolation behavior is validated qualitatively to ensure reasonable calculations outside of the range of validity. Based on the experimental datasets, the equation of state is valid for temperatures from 250 K to 750 K and pressures up to 100 MPa.

Speed of Sound Measurements and a Fundamental Equation of State for Hydrogen Chloride

2018 ◽  
Vol 63 (7) ◽  
pp. 2533-2547 ◽  
Author(s):  
Monika Thol ◽  
Frithjof H. Dubberke ◽  
Elmar Baumhögger ◽  
Roland Span ◽  
Jadran Vrabec
Keyword(s):  
Equation Of State ◽  
Hydrogen Chloride ◽  
Speed Of Sound ◽  
Fundamental Equation ◽  
Fundamental Equation Of State

Fundamental Equation of State for Deuterium

2014 ◽  
Vol 43 (1) ◽  
pp. 013103 ◽  
Author(s):  
I. A. Richardson ◽  
J. W. Leachman ◽  
E. W. Lemmon
Keyword(s):  
Equation Of State ◽  
Fundamental Equation ◽  
Fundamental Equation Of State

A Fundamental Equation of State for Ethanol

2014 ◽  
Vol 43 (4) ◽  
pp. 043102 ◽  
Author(s):  
J. A. Schroeder ◽  
S. G. Penoncello ◽  
J. S. Schroeder
Keyword(s):  
Equation Of State ◽  
Fundamental Equation ◽  
Fundamental Equation Of State
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