Effects of Dimethyl Sulfoxide on Phase Equilibrium Conditions of CO2 and IGCC Fuel Gas Hydrate in the Presence and Absence of Tetra-n-butyl Ammonium Bromide

2016 ◽  
Vol 62 (1) ◽  
pp. 188-193 ◽  
Author(s):  
Yang Luo ◽  
Zhen-Yu Yan ◽  
Jing Li ◽  
Guang-Juan Guo ◽  
Xu-Qiang Guo ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Dimethyl Sulfoxide ◽  
Gas Hydrate ◽  
Ammonium Bromide ◽  
Equilibrium Conditions ◽  
Fuel Gas ◽  
Presence And Absence

Measurement of Latent Heat of Tetra-n-Butyl Ammonium Bromide Hydrate and Specific Enthalpy of Its Slurry

2015 ◽  
Vol 23 (03) ◽  
pp. 1550025 ◽  
Author(s):  
Hiroyuki Kumano ◽  
Tatsunori Asaoka ◽  
Tatsuya Hayashi ◽  
Peng Zhang
Keyword(s):  
Aqueous Solution ◽  
Phase Equilibrium ◽  
Specific Heat ◽  
Latent Heat ◽  
Specific Enthalpy ◽  
Ammonium Bromide ◽  
Equilibrium Conditions ◽  
Hydrate Form ◽  
Latent Heats ◽  
Storage Characteristics

The specific heat of a tetra-n-butyl ammonium bromide (TBAB) aqueous solution, the latent heat of a TBAB hydrate, and the specific enthalpy of a TBAB hydrate slurry were measured to understand the thermal storage characteristics of TBAB hydrate slurry. A solution sample and the hydrate slurry were heated, the change in temperature was measured, and the specific heat of the TBAB aqueous solution and the specific enthalpy of the hydrate slurry were obtained from the change in temperature. Two types of TBAB hydrate form. Therefore, the hydrates were separated from the hydrate slurry formed from TBAB aqueous solution having several initial concentrations. The hydrate crystals were placed into solution, and the latent heats were obtained from the temperature change of the solution. The specific enthalpy of the hydrate slurry was estimated from the latent heats of the hydrate crystals and the specific heat of the solution under phase equilibrium conditions, and the measured and estimated values were compared.

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

Study on the Phase Equilibrium of Gas Hydrate Based on Main-Branch Pipe Confluence Model

2019 ◽  
Author(s):  
Song Deng ◽  
Yali Liu ◽  
Xia Wei ◽  
Lei Tao ◽  
Yanfeng He
Keyword(s):  
Phase Equilibrium ◽  
Gas Hydrate ◽  
Branch Pipe ◽  
Confluence Model

Phase equilibrium modeling of gas hydrate systems for CO2 capture

2012 ◽  
Vol 48 ◽  
pp. 13-27 ◽  
Author(s):  
Peter Jørgensen Herslund ◽  
Kaj Thomsen ◽  
Jens Abildskov ◽  
Nicolas von Solms
Keyword(s):  
Phase Equilibrium ◽  
Co2 Capture ◽  
Gas Hydrate ◽  
Equilibrium Modeling

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%).

Four-Phase Equilibrium Relations of Methane + Methylcyclohexanol Stereoisomer + Water Systems Containing Gas Hydrate

2009 ◽  
Vol 54 (3) ◽  
pp. 996-999 ◽  
Author(s):  
Takashi Makino ◽  
Michiko Mori ◽  
Yasutaka Mutou ◽  
Takeshi Sugahara ◽  
Kazunari Ohgaki
Keyword(s):  
Phase Equilibrium ◽  
Gas Hydrate ◽  
Water Systems
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