Effect of HFC-134a as a Promoter of CO2 Hydrate: Phase Equilibrium, Dissociation Enthalpy and Kinetics

2017 ◽  
Vol 62 (12) ◽  
pp. 4395-4400 ◽  
Author(s):  
Hyunju Lee ◽  
Chansu Park ◽  
Eunkyung Lee ◽  
Ju Dong Lee ◽  
Yangdo Kim
Keyword(s):  
Phase Equilibrium ◽  
Dissociation Enthalpy ◽  
Hfc 134A ◽  
Hydrate Phase ◽  
Equilibrium Dissociation

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

Preliminary study on measurement technology for hydrate phase equilibrium

2015 ◽  
Vol 403 ◽  
pp. 60-69 ◽  
Author(s):  
Sun Shicai ◽  
Zhang Yong ◽  
Kong Yayun ◽  
Liu Changling ◽  
Liu Yufeng
Keyword(s):  
Phase Equilibrium ◽  
Measurement Technology ◽  
Hydrate Phase ◽  
Preliminary Study

Experimental measurements and modelling of carbon dioxide hydrate phase equilibrium with and without ethanol

2016 ◽  
Vol 413 ◽  
pp. 176-183 ◽  
Author(s):  
Paolo F. Ferrari ◽  
Amanda Z. Guembaroski ◽  
Moisés A. Marcelino Neto ◽  
Rigoberto E.M. Morales ◽  
Amadeu K. Sum
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Experimental Measurements ◽  
Hydrate Phase ◽  
Carbon Dioxide Hydrate

Hydrate phase equilibrium for CH4-CO2-H2O system in porous media

2016 ◽  
Vol 94 (8) ◽  
pp. 1592-1598 ◽  
Author(s):  
Yongchen Song ◽  
Shenglong Wang ◽  
Lanlan Jiang ◽  
Yi Zhang ◽  
Mingjun Yang
Keyword(s):  
Porous Media ◽  
Phase Equilibrium ◽  
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%).

CARBON DIOXIDE HYDRATE PHASE EQUILIBRIUM IN THE PRESENCE OF THERMODYNAMIC INHIBITORS

2016 ◽  
Author(s):  
AMANDA ZORZI GUEMBAROSKI ◽  
MOISES ALVES MARCELINO NETO ◽  
RIGOBERTO ELEAZAR MELGAREJO MORALES
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Hydrate Phase ◽  
Carbon Dioxide Hydrate
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