scholarly journals Dynamics of shock waves in bubble zones of finite size with a hydrate-forming gas

2021 ◽  
Vol 2094 (2) ◽  
pp. 022073
Author(s):  
A S Chiglintseva ◽  
I K Gimaltdinov ◽  
I A Chiglintsev ◽  
A A Nasyrov

Abstract The purpose of this study is to study the dynamics of the wave field, which is realized in a channel with a liquid containing a rectangular zone with bubbles of the freon-12 hydrate-forming gas during the propagation of a pressure shock wave. In the initial state, the considered gas-liquid system is under pressure P0. After a sudden increase in pressure to the value of Pe, a pressure wave of a stepped profile propagates in the system and, as a result of the presence of a bubble curtain, its amplitude increases, which in turn has a more favorable effect on the formation of hydrate in gas bubbles. In the initial state, the hydrate formation process was not taken into account. As a result, the dynamics of the pressure wave is shown during its propagation in a semi-infinite channel containing a gas curtain with a hydrate-forming gas. The mechanism of gas hydrate formation is described in this work on the basis of the theory of nonequilibrium phase transitions in vapor-liquid systems.

2001 ◽  
Vol 46 (17) ◽  
pp. 1425-1430 ◽  
Author(s):  
Yongli Zhao ◽  
Kaihua Guo ◽  
Xiaocong Liu ◽  
Shuanshi Fan ◽  
Bifen Shu ◽  
...  

2011 ◽  
Vol 84-85 ◽  
pp. 219-223
Author(s):  
Xia Gao ◽  
Qiang Wu ◽  
Bao Yong Zhang

The new method for separating drained coal bed methane (CBM) is based on gas hydrate formation. The thermodynamic parameters of incipient hydrate formation for the CH4-N2-O2-THF-H2O system were carefully determined. After establishing equilibrium state of three-phase coexistence, CH4 concentrations of vapor phase and that of hydrate phase were determined by GC. The results show that the higher the THF concentration, the larger the CH4 concentration in hydrate phase and the partition coefficient. It can provide the reference for seeking the optimal promoters in the hydrate formation process for the mixed gas.


2010 ◽  
Vol 49 (22) ◽  
pp. 11614-11619 ◽  
Author(s):  
Xiao-Sen Li ◽  
Zhi-Ming Xia ◽  
Zhao-Yang Chen ◽  
Ke-Feng Yan ◽  
Gang Li ◽  
...  

2020 ◽  
Vol 28 (3) ◽  
pp. 881-888 ◽  
Author(s):  
Shuqi Fang ◽  
Xinyue Zhang ◽  
Jingyi Zhang ◽  
Chun Chang ◽  
Pan Li ◽  
...  

Energy ◽  
2010 ◽  
Vol 35 (6) ◽  
pp. 2729-2733 ◽  
Author(s):  
Hyun Ju Lee ◽  
Ju Dong Lee ◽  
Praveen Linga ◽  
Peter Englezos ◽  
Young Seok Kim ◽  
...  

2018 ◽  
Vol 13 (4) ◽  
pp. 92-98 ◽  
Author(s):  
A.S. Chiglintseva ◽  
V.Sh. Shagapov

The mathematical model of the process of gas hydrate formation during gas injection into a snow massif, saturated with the same gas, is constructed. In axisymmetric formulation, analytical solutions are obtained for the distribution of temperature fields, pressures and phase saturations. It is shown that the appearance of various characteristic zones in a snow massif depends on the initial state of the gas–snow system, determined by temperature and pressure, and the mass flow rate of the injected gas. It has been established that an increase in the intensity of gas injection (gas flow rate) leads to an increase in both the length of the bulk zone of hydrate formation and the increase in the fraction of hydrate at the boundary separating the near and intermediate zones.


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