Prediction of Hydrate Phase Equilibrium Conditions for Different Gas Mixtures

2018 ◽  
Author(s):  
Dhifaf Sadeq ◽  
Stefan Iglauer ◽  
Maxim Lebedev ◽  
Ahmed Barifcani
Keyword(s):  
Phase Equilibrium ◽  
Gas Mixtures ◽  
Equilibrium Conditions ◽  
Hydrate Phase

Hydrate Phase Equilibrium of CH4+N2+CO2 Gas Mixtures and Cage Occupancy Behaviors

2017 ◽  
Vol 56 (28) ◽  
pp. 8133-8142 ◽  
Author(s):  
You-Hong Sun ◽  
Sheng-Li Li ◽  
Guo-Biao Zhang ◽  
Wei Guo ◽  
You-Hai Zhu
Keyword(s):  
Phase Equilibrium ◽  
Gas Mixtures ◽  
Co2 Gas ◽  
Hydrate Phase

scholarly journals A Graphical Alternating Conditional Expectation to Predict Hydrate Phase Equilibrium Conditions for Sweet and Sour Natural Gases

2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Hai-Quan Zhong ◽  
Qi-Long Yao ◽  
Yu Wang ◽  
Yu-Fa He ◽  
Zi-Han Li
Keyword(s):  
Phase Equilibrium ◽  
Natural Gas ◽  
Hydrate Formation ◽  
Equilibrium Conditions ◽  
Natural Gases ◽  
Alternating Conditional Expectation ◽  
Hydrate Phase ◽  
Ace Model ◽  
Data Points ◽  
Formation Phase

Natural gas hydrate has been widely of concern due to its great potential in application to address problems including gas storage, transmission, separation techniques, and also as energy resource. Accurate prediction of hydrate formation phase equilibrium conditions is essential for the optimized design during natural gas production, processing, and transportation. In this study, a novel graphical alternating conditional expectation (ACE) algorithm was proposed to predict hydrate formation phase equilibrium conditions for sweet and sour natural gases. The accuracy and performance of the presented ACE model were evaluated using 1055 data points (688, 249, and 118 data points for sweet natural gas, CO2-CH4, and H2S-CO2-CH4 systems, respectively) collected from literature. Meanwhile, a comparative study was conducted between the ACE model and commonly used correlations, including thirteen models for sweet natural gases, three models for CO2-CH4 binary system, and seven thermodynamic models for H2S-CO2-CH4 ternary system. The obtained results indicated that the proposed ACE model produces the best results in prediction of hydrate phase equilibrium temperature for sweet natural gases and pressure for CO2-CH4 system with average absolute relative deviation (AARD) of 0.134% and 2.75%, respectively. The proposed quick and explicit ACE model also provides a better performance in prediction of hydrate phase equilibrium pressure for H2S-CO2-CH4 ternary systems with AARD=5.20% compared with seven thermodynamic methods considered in this work, except for CPA/Electrolyte/Chen–Guo combined model (AARD=4.45%).

Hydrate Phase Equilibrium of CH4-Rich Binary and Ternary Gas Mixtures in the Presence of Tetra-n-butyl Ammonium Bromide

2019 ◽  
Vol 64 (12) ◽  
pp. 5929-5934
Author(s):  
Shuanshi Fan ◽  
Shali You ◽  
Yanhong Wang ◽  
Xuemei Lang ◽  
Chi Yu ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Gas Mixtures ◽  
Ammonium Bromide ◽  
Hydrate Phase

Influence of tetramethylammonium hydroxide on methane and carbon dioxide gas hydrate phase equilibrium conditions

2017 ◽  
Vol 440 ◽  
pp. 1-8 ◽  
Author(s):  
Muhammad Saad Khan ◽  
Behzad Partoon ◽  
Cornelius B. Bavoh ◽  
Bhajan Lal ◽  
Nurhayati Bt Mellon
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Gas Hydrate ◽  
Tetramethylammonium Hydroxide ◽  
Equilibrium Conditions ◽  
Carbon Dioxide Gas ◽  
Hydrate Phase

Hydrate phase equilibrium of H2/CH4/CO2 ternary gas mixtures and cage occupancy percentage of hydrogen molecules

2015 ◽  
Vol 403 ◽  
pp. 160-166 ◽  
Author(s):  
Xiao-Hui Wang ◽  
Hui-Bo Qin ◽  
Abhijit Dandekar ◽  
Yun-Fei Wang ◽  
Yi-Fei Sun ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Gas Mixtures ◽  
Hydrogen Molecules ◽  
Hydrate Phase
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