Solubility of H2S in Aqueous Diisopropanolamine + Piperazine Solutions: New Experimental Data and Modeling with the Electrolyte Cubic Square-Well Equation of State

AbstractThe thermodynamics of fluids in confined (capillary) media is different from the bulk conditions due to the effects of the surface tension, wettability, and pore radius as described by the classical Kelvin equation. This study provides experimental data showing the deviation of propane vapour pressures in capillary media from the bulk conditions. Comparisons were also made with the vapour pressures calculated by the Peng–Robinson equation-of-state (PR-EOS). While the propane vapour pressures measured using synthetic capillary medium models (Hele–Shaw cells and microfluidic chips) were comparable with those measured at bulk conditions, the measured vapour pressures in the rock samples (sandstone, limestone, tight sandstone, and shale) were 15% (on average) less than those modelled by PR-EOS.

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Measurement of the sound velocity of shock compressed water

Scientific Reports ◽

10.1038/s41598-021-84978-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Hua Shu ◽

Jiangtao Li ◽

Yucheng Tu ◽

Junjian Ye ◽

Junyue Wang ◽

...

Keyword(s):

Experimental Data ◽

Molecular Dynamics ◽

Equation Of State ◽

Liquid Water ◽

Diamond Anvil Cell ◽

Quantum Molecular Dynamics ◽

Laser Shock ◽

Diamond Anvil ◽

Ionization Processes ◽

Sound Velocities

AbstractThe sound velocities of water in the Hugoniot states are investigated by laser shock compression of precompressed water in a diamond anvil cell. The obtained sound velocities in the off-Hugoniot region of liquid water at precompressed conditions are used to test the predictions of quantum molecular dynamics (QMD) simulations and the SESAME equation-of-state (EOS) library. It is found that the prediction of QMD simulations agrees with the experimental data while the prediction of SESAME EOS library underestimates the sound velocities probably due to its improper accounting for the ionization processes.

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Solid-Fluid Phase Equilibria Measurement for Mixtures of Methane, Carbon-Dioxide and N-Hexadecane

10.2118/208245-ms ◽

2021 ◽

Author(s):

Oluwakemi Victoria Eniolorunda ◽

Antonin Chapoy ◽

Rod Burgass

Keyword(s):

Experimental Data ◽

Carbon Dioxide ◽

Equation Of State ◽

Phase Equilibria ◽

Activity Coefficients ◽

Fluid Phase ◽

Ternary Mixtures ◽

Binary Interaction ◽

Thermodynamic Models ◽

Methane Carbon

Abstract In this study, new experimental data using a reliable approach are reported for solid-fluid phase equilibrium of ternary mixtures of Methane-Carbon-dioxide- n-Hexadecane for 30-73 mol% CO2 and pressures up to 24 MPa. The effect of varying CO2 composition on the overall phase transition of the systems were investigated. Three thermodynamic models were used to predict the liquid phase fugacity, this includes the Peng Robison equation of state (PR-EoS), Soave Redlich-Kwong equation of state (SRK-EoS) and the Cubic plus Association (CPA) equation of state with the classical mixing rule and a group contribution approach for calculating binary interaction parameters in all cases. To describe the wax (solid) phase, three activity coefficient models based on the solid solution theory were investigated: the predictive universal quasichemical activity coefficients (UNIQUAC), Universal quasi-chemical Functional Group activity coefficients (UNIFAC) and the predictive Wilson approach. The solid-fluid equilibria experimental data gathered in this experimental work including those from saturated and under-saturated conditions were used to check the reliability of the various phase equilibria thermodynamic models.

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Analysis of Equation of State for Carbon Nanotubes

Journal of Nanotechnology ◽

10.1155/2013/639068 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Jeewan Chandra ◽

Pooja Kapri Bhatt ◽

Kuldeep Kholiya

Keyword(s):

Experimental Data ◽

Carbon Nanotubes ◽

Thermal Expansion ◽

Carbon Nanotube ◽

Equation Of State ◽

Compression Behavior ◽

Nanotube Bundles ◽

The Individual

Compression behavior of carbon nanotube bundles and individual carbon nanotubes within the bundle has been studied by using the Suzuki, Shanker, and usual Tait formulations. It is found that the Suzuki formulation is not capable of explaining the compression behavior of nanomaterials. Shanker formulation slightly improves the results obtained by the Suzuki formulation, but only usual Tait’s equation (UTE) of state gives results in agreement to the experimental data. The present study reveals that the product of bulk modules and the coefficient of volume thermal expansion remain constant for carbon nanotubes. It has also been found that the individual carbon nanotubes are less compressible than bundles of carbon nanotubes.

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An equation of state contribution for dipolar and quadrupolar square-well fluids

Molecular Physics ◽

10.1080/00268970701871015 ◽

2008 ◽

Vol 106 (1) ◽

pp. 161-174 ◽

Cited By ~ 6

Author(s):

Farzad Alavi ◽

Farzaneh Feyzi

Keyword(s):

Equation Of State ◽

State Contribution ◽

Square Well

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Equation of state for rhodium at high pressures

Journal of Physics Conference Series ◽

10.1088/1742-6596/2057/1/012118 ◽

2021 ◽

Vol 2057 (1) ◽

pp. 012118

Author(s):

K V Khishchenko

Keyword(s):

Experimental Data ◽

Numerical Simulation ◽

Equation Of State ◽

Internal Energy ◽

Specific Volume ◽

High Pressures ◽

Thermodynamic Characteristics ◽

Wide Range ◽

Hydrodynamic Processes

Abstract An equation of state has been developed for rhodium in a wide range of changes in the specific volume and internal energy. The results of calculations of the thermodynamic characteristics of this metal are presented in comparison with the available experimental data at high pressures. This equation of state can be used in the numerical simulation of hydrodynamic processes under intense impulse influences on matter.

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Parameters of the Bender Equation of State for Chloro Derivatives of Methane and Chlorobenzene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20010833 ◽

2001 ◽

Vol 66 (6) ◽

pp. 833-854 ◽

Cited By ~ 1

Author(s):

Ivan Cibulka ◽

Lubomír Hnědkovský ◽

Květoslav Růžička

Keyword(s):

Experimental Data ◽

Equation Of State ◽

Virial Coefficient ◽

Second Virial Coefficient ◽

Virial Coefficients ◽

Liquid Equilibrium ◽

Second Virial Coefficients ◽

Equilibrium Data ◽

State Behaviour ◽

Derivatives Of

Values of adjustable parameters of the Bender equation of state evaluated for chloromethane, dichloromethane, trichloromethane, tetrachloromethane, and chlorobenzene from published experimental data are presented. Experimental data employed in the evaluation included the data on state behaviour (p-ρ-T) of fluid phases, vapour-liquid equilibrium data (saturated vapour pressures and orthobaric densities), second virial coefficients, and the coordinates of the gas-liquid critical point. The description of second virial coefficient by the equation of state is examined.

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