scholarly journals Bulk and Interfacial Properties of the Decane + Water System in the Presence of Methane, Carbon Dioxide, and Their Mixture

2020 ◽  
Vol 124 (43) ◽  
pp. 9556-9569
Author(s):  
Yafan Yang ◽  
Arun Kumar Narayanan Nair ◽  
Mohd Fuad Anwari Che Ruslan ◽  
Shuyu Sun
Keyword(s):  
Carbon Dioxide ◽  
Water System ◽  
Interfacial Properties ◽  
Methane Carbon

Interfacial properties of the alkane+water system in the presence of carbon dioxide and hydrophobic silica

Fuel ◽  
2022 ◽  
Vol 310 ◽  
pp. 122332
Author(s):  
Yafan Yang ◽  
Arun Kumar Narayanan Nair ◽  
Mohd Fuad Anwari Che Ruslan ◽  
Shuyu Sun
Keyword(s):  
Carbon Dioxide ◽  
Water System ◽  
Interfacial Properties ◽  
Hydrophobic Silica

scholarly journals Bulk and interfacial properties of decane in the presence of carbon dioxide, methane, and their mixture

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Nilesh Choudhary ◽  
Arun Kumar Narayanan Nair ◽  
Mohd Fuad Anwari Che Ruslan ◽  
Shuyu Sun
Keyword(s):  
Carbon Dioxide ◽  
Oil Recovery ◽  
Carbon Capture ◽  
Theoretical Calculations ◽  
Carbon Capture And Storage ◽  
Interfacial Properties ◽  
Gradient Theory ◽  
Geological Conditions ◽  
Dynamics Simulations ◽  
Methane Carbon

AbstractMolecular dynamics simulations were performed to study the bulk and interfacial properties of methane + n-decane, carbon dioxide + n-decane, and methane + carbon dioxide + n-decane systems under geological conditions. In addition, theoretical calculations using the predictive Peng-Robinson equation of state and density gradient theory are carried out to compare with the simulation data. A key finding is the preferential dissolution in the decane-rich phase and adsorption at the interface for carbon dioxide from the methane/carbon dioxide mixture. In general, both the gas solubility and the swelling factor increase with increasing pressure and decreasing temperature. Interestingly, the methane solubility and the swelling of the methane + n-decane system are not strongly influenced by temperature. Our results also show that the presence of methane increases the interfacial tension (IFT) of the carbon dioxide + n-decane system. Typically, the IFT of the studied systems decreases with increasing pressure and temperature. The relatively higher surface excess of the carbon dioxide + n-decane system results in a steeper decrease in its IFT as a function of pressure. Such systematic investigations may help to understand the behavior of the carbon dioxide-oil system in the presence of impurities such as methane for the design and operation of carbon capture and storage and enhanced oil recovery processes.

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 Local structure and distortions of mixed methane-carbon dioxide hydrates

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Bernadette R. Cladek ◽  
S. Michelle Everett ◽  
Marshall T. McDonnell ◽  
Matthew G. Tucker ◽  
David J. Keffer ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Exchange Process ◽  
Carbon Dioxide Sequestration ◽  
Distribution Functions ◽  
Atomic Scale ◽  
Mixed Gas ◽  
Pure Compounds ◽  
Dynamics Simulations ◽  
Pair Distribution Functions ◽  
Methane Carbon

AbstractA vast source of methane is found in gas hydrate deposits, which form naturally dispersed throughout ocean sediments and arctic permafrost. Methane may be obtained from hydrates by exchange with hydrocarbon byproduct carbon dioxide. It is imperative for the development of safe methane extraction and carbon dioxide sequestration to understand how methane and carbon dioxide co-occupy the same hydrate structure. Pair distribution functions (PDFs) provide atomic-scale structural insight into intermolecular interactions in methane and carbon dioxide hydrates. We present experimental neutron PDFs of methane, carbon dioxide and mixed methane-carbon dioxide hydrates at 10 K analyzed with complementing classical molecular dynamics simulations and Reverse Monte Carlo fitting. Mixed hydrate, which forms during the exchange process, is more locally disordered than methane or carbon dioxide hydrates. The behavior of mixed gas species cannot be interpolated from properties of pure compounds, and PDF measurements provide important understanding of how the guest composition impacts overall order in the hydrate structure.

Effects of Pore Sizes on Dissociation Temperatures and Pressures of Methane, Carbon Dioxide, and Propane Hydrates in Porous Media

2002 ◽  
Vol 106 (4) ◽  
pp. 820-826 ◽  
Author(s):  
Tsutomu Uchida ◽  
Takao Ebinuma ◽  
Satoshi Takeya ◽  
Jiro Nagao ◽  
Hideo Narita
Keyword(s):  
Carbon Dioxide ◽  
Porous Media ◽  
Pore Sizes ◽  
Methane Carbon

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

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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