Modeling and characterizing the thermal and kinetic behavior of methane hydrate dissociation in sandy porous media

Liao, Youqiang; Zheng, Junjie; Wang, Zhiyuan; Sun, Baojiang; Sun, Xiaohui; Linga, Praveen

doi:10.1016/j.apenergy.2022.118804

Cited by 31 publications

(5 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the throttling process and the reduction of the pressure of the reactor reduced the temperature of the reactor. This is a fact that the Joule–Thomson effect can reduce the temperature of the hydrate reservoir, move the temperature and pressure point to the phase equilibrium line, and reduce the driving force for decomposition. − On the other hand, a large amount of hydrate dissociation took away heat because the hydrate decomposition was a heat-absorbing process, and the temperature of the reactor dropped significantly, which hindered hydrate decomposition. − …”

Section: Resultsmentioning

confidence: 99%

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand

Gao

Guan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Natural gas has been considered as a transiting fossil fuel into the future low-carbon world, improving air quality and reducing carbon intensity. The efficiency of purifying unconventional gas resources and recovering gas from hydrates via a CO 2 − CH 4 exchange has attracted widespread attention in the scientific fields. However, the associated fluid flow, heat transfer, and hydrate reaction kinetics involving the mixed gas formation and dissociation are strongly needed in understanding the fundamental thermophysical properties. In this study, we designed a series of experiments employing depressurization and thermal stimulation to dissociate mixed CO 2 + CH 4 hydrates. We examined the kinetics, fluid production behavior, heat transfer characteristics, and separation factors during the hydrate formation and dissociation processes. The gas consumption and each phase saturation show a good consistency in all cases, however, the induction time was stochastic, ranging from 38 to 58 min. The separation factors were all less than 1.0, and the hydrate shows a strong selectivity to CH 4 during the gas mixture hydrate formation process. The gas production increased with the decrease of the depressurization pressure. The peak value of the decomposition rate at 0.5 MPa is 0.2147 mol/min, which is 1.13 times that at 1.0 MPa and 13.5 times that at 1.5 MPa. Increasing decomposition temperature led to the rapid end of hydrate decomposition. The CO 2 fraction was larger than that of CH 4 during the hydrate dissociation process, and CO 2 was easier to escape from the hydrate cage structure during the mixed gas hydrate decomposition process with decreasing pressure and increasing temperature.

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand

Gao

Guan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Therefore, the classical one-temperature model Eq. ( 28) is reasonable to compute the volume-average energy equation at the REV scale without significant loss of accuracy compared to the thermal non-equilibrium model (Liao et al, 2022). Since the heat transport limitation can be characterised by the volume-averaged temperature via the term Eq.…”

Section: Implications For Upscaling the Kinetic Modelmentioning

confidence: 99%

Upscaling methane hydrate dissociation kinetic model during depressurisation

Yang

Liu

et al. 2023

Chemical Engineering Science

View full text Add to dashboard Cite

“…Sa et al directly observed the perturbation of liquid water structure induced by amino acids and the influence of hydrate nucleation and growth kinetics through Raman spectroscopy . Bavoh et al showed that the thermodynamic inhibitory effect of glycine is stronger than that of arginine, alanine, and serine. − …”

Section: Introductionmentioning

confidence: 99%

Comprehensive Study of Synergistic-Dual-Functional Mechanism of Kinetic and Thermodynamic Inhibitors in a Hydrate Drilling Fluid System

Wang,

Yao,

Gong

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Pipeline blockage and drilling problems caused by the deposition of natural gas hydrate are difficulties in the process of oil and gas production. Adding chemical inhibitors to drilling fluid is one of the main methods to prevent hydrate regeneration in wellbore. In recent years, kinetic inhibitors with low doses and high inhibition performance have been widely and deeply studied. In this paper, based on the improved wellbore hydrate deposits and an inhibition and decomposition simulation experimental device, and based on the evaluation and analysis of the synergistic effect between the three commonly used kinetic inhibitors of polyvinylpyrrolidone, glycine, and pectin and the thermodynamic inhibitors of salts, a high-efficiency hydrate inhibition drilling fluid system was developed. The results show that (1) Compared with the pure water system, the kinetic inhibitor can inhibit the deposition of hydrate in the reactor by prolonging the induction time of hydrate deposits, adsorbing on the hydrate surface, or destroying the stability of hydrate. (2) Due to the differences in the mechanism of inhibiting hydrate deposits among different kinetic inhibitors, the optimal dosage of the three kinds of kinetic inhibitors is different, which is 1.0 wt % PVP, 1.0 wt % Gly, and 0.1 wt % pectin, respectively. Only when Gly and PVP are combined with NaCl and KCl can the synergistic inhibition effect be obvious. (3) The inhibition effect of the drilling fluid system with an inhibitor on hydrate deposits was evaluated, and the efficient inhibition drilling fluid systems "Base mud +0.5 wt % pectin" or "Base mud +0.5 wt % PVP+5 wt % KCl" suitable for hydrate production in marine environment were selected. The results of this study provide a reference for solving the stability and safety problems in the process of hydrate drilling.

show abstract

Modeling and characterizing the thermal and kinetic behavior of methane hydrate dissociation in sandy porous media

Cited by 31 publications

References 58 publications

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand

Upscaling methane hydrate dissociation kinetic model during depressurisation

Comprehensive Study of Synergistic-Dual-Functional Mechanism of Kinetic and Thermodynamic Inhibitors in a Hydrate Drilling Fluid System

Contact Info

Product

Resources

About

Modeling and characterizing the thermal and kinetic behavior of methane hydrate dissociation in sandy porous media

Cited by 31 publications

References 58 publications

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO2 + CH4 Hydrates in Quartz Sand

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO2 + CH4 Hydrates in Quartz Sand

Upscaling methane hydrate dissociation kinetic model during depressurisation

Comprehensive Study of Synergistic-Dual-Functional Mechanism of Kinetic and Thermodynamic Inhibitors in a Hydrate Drilling Fluid System

Contact Info

Product

Resources

About

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand

Experimental Study on the Formation and Dissociation Characteristics of Mixed CO₂ + CH₄ Hydrates in Quartz Sand