Ways to improve the efficiency of carbon dioxide utilization and gas hydrate storage at low temperatures

Misyura, S.Y.; Donskoy, Igor

doi:10.1016/j.jcou.2019.07.010

Cited by 69 publications

(19 citation statements)

References 48 publications

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“…In this paper, it is supposed that the substitution process will be realized under thermobaric conditions corresponding to the existence of CH4 hydrate and CO2 hydrate, as well as the existence of carbon dioxide in the gaseous state (darkened area in the phase diagram). As methane hydrate is less stable than carbon dioxide hydrate, under certain conditions, carbon dioxide molecules will replace methane molecules in gas hydrate without releasing free water [14,15].…”

Section: Problem Statementmentioning

confidence: 99%

“…Let us write the mass conservation equations for CO2 and CH4 [38][39][40][41][42]: As methane hydrate is less stable than carbon dioxide hydrate, under certain conditions, carbon dioxide molecules will replace methane molecules in gas hydrate without releasing free water [14,15].…”

Section: Problem Statementmentioning

confidence: 99%

“…One of the important environmental problems that needs to be addressed is the reduction of carbon dioxide emissions into the atmosphere. One of the methods of CO 2 utilization is its underground conservation in the gas hydrate state [15]. The numerical study of the processes of heat and mass transfer, accompanied by hydrate formation, when injecting gas into a porous reservoir, is carried out, for example, in [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

2020

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In this paper, the process of methane replacement in gas hydrate with carbon dioxide during CO2 injection into a porous medium is studied. A model that takes into account both the heat and mass transfer in a porous medium and the diffusion kinetics of the replacement process is constructed. The influences of the diffusion coefficient, the permeability and extent of a reservoir on the time of full gas replacement in the hydrate are analyzed. It was established that at high values of the diffusion coefficient in hydrate, low values of the reservoir permeability, and with the growth of the reservoir length, the process of the CH4-CO2 replacement in CH4 hydrate will take place in the frontal regime and be limited, generally, by the filtration mass transfer. Otherwise, the replacement will limited by the diffusion of gas in the hydrate.

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Section: Problem Statementmentioning

confidence: 99%

Section: Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

2020

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“…Textural characteristics change over time during gas hydrate dissociations, and the morphology of structures on the surface of the granule changes [ 17 , 18 ]. The kinetic constants of gas hydrates during their dissociation significantly change during the transition from positive to negative temperatures [ 19 ]. With a thick layer of powder, it is also necessary to consider the filtration of gas (formed during dissociation) through the powder layer.…”

Section: Introductionmentioning

confidence: 99%

Gas Hydrate Combustion in Five Method of Combustion Organization

Misyura

Manakov

Nyashina

et al. 2020

Entropy

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Experiments on the dissociation of a mixed gas hydrate in various combustion methods are performed. The simultaneous influence of two determining parameters (the powder layer thickness and the external air velocity) on the efficiency of dissociation is studied. It has been shown that for the mixed hydrate, the dissociation rate under induction heating is 10–15 times higher than during the burning of a thick layer of powder, when the combustion is realized above the layer surface. The minimum temperature required for the initiation of combustion for different combustion methods was studied. As the height of the sample layer increases, the rate of dissociation decreases. The emissions of NOx and CO for the composite hydrate are higher than for methane hydrate at the same temperature in a muffle furnace. A comparison of harmful emissions during the combustion of gas hydrates with various types of coal fuels is presented. NOx concentration as a result of the combustion of gas hydrates is tens of times lower than when burning coal fuels. Increasing the temperature in the muffle furnace reduces the concentration of combustion products of gas hydrates.

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“…Since there is no chemical bond between water and gas molecules, gas extraction is possible by reducing the pressure and/or thermal effect on the deposit [7,8]. A number of papers (for example, [9][10][11][12][13][14][15]) have presented theoretical approaches to solving these problems. That is, there is a great deal of attention given to the application of mathematical methods in solving practical problems [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Solution of the Problem of Natural Gas Storages Creating in Gas Hydrate State in Porous Reservoirs

Мусакаев

Хасанов

2020

Mathematics

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Underground gas hydrate storage of natural gas is a rather promising way of creating underground storage facilities for hydrocarbon raw materials in porous reservoirs. This paper presents a solution to the problem of the formation of CH4 hydrate in a porous medium during the injection of methane into a reservoir at a temperature lower than the initial temperature of the reservoir. Self-similar solutions of the problem in axisymmetric approximation are given, describing the pressure and temperature distribution in separate reservoir regions at the formation of gas hydrate on the frontal surface. On the basis of the method of sequential change of stationary states, an analytical solution was obtained, which allowed us to determine the position of the methane hydrate formation boundary depending on different parameters for any moment of time. The limits of the applicability of the proposed model are also given. Thus, the analysis of the calculation results showed that the constructed solution allows one to sufficiently and accurately determine the values of parameters at the frontal surface for a highly permeable medium (k0 > 10−13 m2). It was proved that in the case of a highly permeable medium, the methane hydrate formation intensity will be limited by convective heat dissipation during hydrate formation.

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Ways to improve the efficiency of carbon dioxide utilization and gas hydrate storage at low temperatures

Cited by 69 publications

References 48 publications

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

Gas Hydrate Combustion in Five Method of Combustion Organization

Solution of the Problem of Natural Gas Storages Creating in Gas Hydrate State in Porous Reservoirs

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