Experimental Data Assessment Test for Composition of Vapor Phase in Equilibrium with Gas Hydrate and Liquid Water for Carbon Dioxide + Methane or Nitrogen + Water System

2012 ◽  
Vol 51 (9) ◽  
pp. 3819-3825 ◽  
Author(s):  
Ali Eslamimanesh ◽  
Saeedeh Babaee ◽  
Amir H. Mohammadi ◽  
Jafar Javanmardi ◽  
Dominique Richon
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Vapor Phase ◽  
Liquid Water ◽  
Gas Hydrate ◽  
Water System ◽  
Data Assessment

scholarly journals Gas Hydrate Equilibrium Measurement of Methane + Carbon Dioxide + Tetrahydrofuran+ Water System at High CO2 Concentrations

2016 ◽  
Vol 148 ◽  
pp. 1220-1224 ◽  
Author(s):  
Behzad Partoon ◽  
Omar Nashed ◽  
Zamzila Kassim ◽  
Khalik M. Sabil ◽  
Jitendra Sangwai ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Hydrate ◽  
Water System ◽  
High Co2 ◽  
Co2 Concentrations ◽  
Methane Carbon

scholarly journals Study on Hydrate Phase Equilibrium Diagram of Methane Containing System Based on Thermodynamic Model

2021 ◽  
Vol 9 ◽  
Author(s):  
Hao Liang ◽  
Yonggang Duan ◽  
Jun Pei ◽  
Na Wei
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Free Energy ◽  
Phase Equilibrium ◽  
Gas Hydrate ◽  
Thermodynamic Model ◽  
Formation Enthalpy ◽  
Statistical Thermodynamic ◽  
Equilibrium Pressure ◽  
Pure Methane

Natural gas hydrate is a potential energy source in the future, which widely occurs in nature and industrial activities, and its formation and decomposition are identified by phase equilibrium. The calculation of multicomponent gas phase equilibrium is more complex than that of single component gas, which depends on the accurate model characterized by enthalpy and free energy. Based on the Kvamme-Tanaka statistical thermodynamic model, theoretical and experimental methods were used to predict and verify the phase equilibrium of pure methane hydrate and carbon dioxide hydrate in the temperature range of 273.17–289.05 K. The phase equilibrium curves of methane-containing gases such as CH4+CO2,CH4+C2H6,CH4+H2S and CH4+CO2+H2S under different mole fractions were drawn and analyzed, and the decomposition or formation enthalpy and free energy of hydrate were calculated. The results show that, the phase equilibrium curves of the methane containing systems is mainly related to the guest molecule type and the composition of gas. The evolution law of phase equilibrium pressure of different gases varies with composition and temperature, and the phase splitting of CO2 at the quadruple point affects the phase equilibrium conditions. Due to the consideration of the interaction between the motion of guest molecules and the vibration of crystal lattice, the model exhibits a good performance, which is quantified in terms of mean square error (MSE) with respect to the experimental data. The magnitudes of MSE percent are respectively 1.2, 4.8, 15.12 and 9.20 MPa2 for CH4+CO2, CH4+C2H6, CH4+H2S and CH4+CO2+H2S systems, and the values are as low as 3.57 and 1.32 MPa2 for pure methane and carbon dioxide, respectively. This study provides engineers and researchers who want to consult the diagrams at any time with some new and accurate experimental data, calculated results and phase equilibrium curves. The research results are of great significance to the development and utilization of gas hydrate and the flow safety prediction of gas gathering and transportation.

Gas Hydrate Formation in Carbon Dioxide + Nitrogen + Water System: Compositional Analysis of Equilibrium Phases

2011 ◽  
Vol 50 (8) ◽  
pp. 4722-4730 ◽  
Author(s):  
Veronica Belandria ◽  
Ali Eslamimanesh ◽  
Amir H. Mohammadi ◽  
Dominique Richon
Keyword(s):  
Carbon Dioxide ◽  
Gas Hydrate ◽  
Water System ◽  
Hydrate Formation ◽  
Compositional Analysis ◽  
Gas Hydrate Formation ◽  
Equilibrium Phases

scholarly journals Measurement of the sound velocity of shock compressed water

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.

The role of electrode wettability in electrochemical reduction of carbon dioxide

2021 ◽  
Author(s):  
Mengran Li ◽  
Mohamed Nazmi Idros ◽  
Yuming Wu ◽  
Thomas Burdyny ◽  
Sahil Garg ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Liquid Water ◽  
Substantial Improvement ◽  
Industrial Scale ◽  
High Current ◽  
Current Densities

The electrochemical reduction of carbon dioxide (CO2RR) requires access to ample gaseous CO2 and liquid water to fuel reactions at high current densities for industrial-scale. Substantial improvement of the CO2RR...

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