Selective trapping of CO2 gas and cage occupancy in CO2–N2 and CO2–CO mixed gas hydrates

2018 ◽  
Vol 54 (34) ◽  
pp. 4290-4293 ◽  
Author(s):  
Claire Petuya ◽  
Françoise Damay ◽  
Sarah Desplanche ◽  
David Talaga ◽  
Arnaud Desmedt
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Gas Hydrates ◽  
Hydrate Formation ◽  
Gas Mixtures ◽  
Clathrate Hydrate ◽  
Mixed Gas ◽  
Co2 Gas ◽  
Carbon Dioxide Separation

New carbon dioxide separation and capture technology, thanks to clathrate hydrate formation from pressurized ice with (carbon monoxide and nitrogen containing) gas mixtures.

scholarly journals Influence of Nitrogen on Structure, Guest Distribution and Hydrate Formation Conditions of the Mixed CO2–CH4 and CO2–CH4–N2 Gas Hydrates

2018 ◽  
Author(s):  
Vladimir R. Belosludov ◽  
Yulia Yu. Bozhko ◽  
Oleg S. Subbotin ◽  
Rodion V. Belosludov ◽  
Ravil К. Zhdanov ◽  
...  
Keyword(s):  
Gas Phase ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Lattice Relaxation ◽  
Host Lattice ◽  
Clathrate Hydrate ◽  
Formation Pressure ◽  
Co2 Gas ◽  
Formation Conditions

In this contribution, a method based on a solid solution theory of clathrate hydrate for multiple cage occupancy, host lattice relaxation and guest-guest interactions has been presented to estimate hydrate formation conditions of binary and ternary gas mixtures. We have performed molecular modeling of structure, guest distribution, and hydrate formation conditions for the CO2 + CH4, and CO2 + CH4 + N2 gas hydrates. In all considered systems with and without N2, at high and medium content of CO2 in the gas phase we have found that CO2 is more favorable to occupy clathrate hydrate cavities than CH4 or N2. Addition of N2 to the gas phase increases ratio concentration CO2 in compressing with concentration CH4 in clathrate hydrates and makes gas replacement more effective. The mole fractions of CO2 in CO2 + CH4 + N2 gas hydrate rapidly increases with the growth of its content in the gas phase. And the formation pressure of CO2 + CH4 + N2 gas hydrate rises in comparison with the formation pressure of CO2 + CH4 gas hydrate. Obtained results agree with the known experimental data for simple CH4, CO2 gas hydrates and mixed CO2 + CH4 gas hydrate.

scholarly journals Influence of N2 on Formation Conditions and Guest Distribution of Mixed CO2 + CH4 Gas Hydrates

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3336 ◽  
Author(s):  
Vladimir Belosludov ◽  
Yulia Bozhko ◽  
Oleg Subbotin ◽  
Rodion Belosludov ◽  
Ravil Zhdanov ◽  
...  
Keyword(s):  
Gas Phase ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Lattice Relaxation ◽  
Host Lattice ◽  
Clathrate Hydrate ◽  
Formation Pressure ◽  
Co2 Gas ◽  
Formation Conditions

In this contribution, a method based on a solid solution theory of clathrate hydrate for multiple cage occupancy, host lattice relaxation, and guest-guest interactions is presented to estimate hydrate formation conditions of binary and ternary gas mixtures. We performed molecular modeling of the structure, guest distribution, and hydrate formation conditions for the CO2 + CH4 and CO2 + CH4 + N2 gas hydrates. In all considered systems with and without N2, at high and medium content of CO2 in the gas phase, we found that CO2 was more favorable in occupying clathrate hydrate cavities than CH4 or N2. The addition of N2 to the gas phase increased the ratio concentration of CO2 in comparison with the concentration of CH4 in clathrate hydrates and made gas replacement more effective. The mole fraction of CO2 in the CO2 + CH4 + N2 gas hydrate rapidly increased with the growth of its content in the gas phase, and the formation pressure of the CO2 + CH4 + N2 gas hydrate rose in comparison to the formation pressure of the CO2 + CH4 gas hydrate. The obtained results agreed with the known experimental data for simple CH4 and CO2 gas hydrates and the mixed CO2 + CH4 gas hydrate.

PROSPECTS FOR OBTAINING GAS MOTOR FUEL FROM BIOGAS OF ANAEROBIC DIGESTION OF AGRICULTURAL WASTE

2021 ◽  
Vol 3 (144) ◽  
pp. 22-31
Author(s):  
Viktor S. Grigor’yev ◽  
◽  
Il’ya V. Romanov
Keyword(s):  
Anaerobic Digestion ◽  
Gas Hydrates ◽  
Process Model ◽  
Organic Waste ◽  
Agricultural Waste ◽  
Motor Fuel ◽  
Hydrate Formation ◽  
Research Purpose ◽  
Industrial Complex ◽  
Mixed Gas

The ability of gas hydrates to concentrate gas into a solid chelate structure and the properties of self-preservation of gas hydrates at negative temperatures allows us to consider the possibility of developing a method for the utilization of biogas, environmentally safe storage and transportation of biomethane. (Research purpose) The research purpose is in substantiation the technological possibilities of obtaining synthetic mixed gas hydrates of biogas components, their storage and transportation based on the analysis of the existing regularities of the formation of gas hydrates in time, temperature and external pressure. (Materials and methods) The article presents the accumulated results of studies of the process of obtaining artificial hydrates of natural gas and methane- containing gas mixtures at various initial static pressures and temperatures. The object of research to substantiate the parameters of artificial creation of gas hydrates is biogas obtained during anaerobic thermophilic fermentation of organic waste at an existing experimental biogas plant. Mixed feed SK-8 with a humidity of 90-92 percent was used as an organic substrate of constant composition. The composition of biogas was studied using the Optima-7 Biogas gas analyzer. (Results and discussion) The article presents a process model and a technical appearance of an installation for producing gas motor fuel from the biogas of anaerobic digestion of organic waste of the agro-industrial complex. The hydrate formation time depends on the increase in the interfacial surface and the movement of gas bubbles relative to the liquid, which can be regulated by acting on the hydrate formation zone (shock wave, electromagnetic, mechanical, chemical, temperature). (Conclusions) The research results can be used in modeling processes in two-phase media during the formation of gas hydrates and the creation of installations for their production.

scholarly journals Molecular Simulations of CO2/CH4, CO2/N2 and N2/CH4 Binary Mixed Hydrates

2021 ◽  
Vol 83 (3) ◽  
pp. 372-378
Author(s):  
A. A. Sizova ◽  
S. A. Grintsevich ◽  
M. A. Kochurin ◽  
V. V. Sizov ◽  
E. N. Brodskaya
Keyword(s):  
Carbon Dioxide ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Gas Hydrates ◽  
Molecular Simulations ◽  
Gas Mixtures ◽  
Gas Mixture ◽  
Grand Canonical Monte Carlo ◽  
Multicomponent Gas ◽  
Grand Canonical

Abstract Grand canonical Monte Carlo simulations were performed to study the occupancy of structure I multicomponent gas hydrates by CO2/CH4, CO2/N2, and N2/CH4 binary gas mixtures with various compositions at a temperature of 270 K and pressures up to 70 atm. The presence of nitrogen in the gas mixture allows for an increase of both the hydrate framework selectivity to CO2 and the amount of carbon dioxide encapsulated in hydrate cages, as compared to the CO2/CH4 hydrate. Despite the selectivity to CH4 molecules demonstrated by N2/CH4 hydrate, nitrogen can compete with methane if the gas mixture contains at least 70% of N2.

Insights into CO2 Capture by Flue Gas Hydrate Formation: Gas Composition Evolution in Systems Containing Gas Hydrates and Gas Mixtures at Stable Pressures

2018 ◽  
Vol 6 (5) ◽  
pp. 5732-5736 ◽  
Author(s):  
Aliakbar Hassanpouryouzband ◽  
Jinhai Yang ◽  
Bahman Tohidi ◽  
Evgeny Chuvilin ◽  
Vladimir Istomin ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Flue Gas ◽  
Hydrate Formation ◽  
Gas Mixtures ◽  
Gas Composition ◽  
Gas Hydrate Formation

A113 Thermodynamic Simulations of Isobaric Hydrate-Forming Operations for Carbon Dioxide Separation from CH_4+CO_2 Mixed Gas

2011 ◽  
Vol 2011 (0) ◽  
pp. 5-6
Author(s):  
Satoru Akatsu ◽  
Wataru Kondo ◽  
Mitsuru Miyagawa ◽  
Masahiro Takahashi ◽  
Ryo Ohmura ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Mixed Gas ◽  
Carbon Dioxide Separation ◽  
Thermodynamic Simulations

Spectroscopic analysis of carbon dioxide and nitrogen mixed gas hydrates in silica gel for CO2 separation

2006 ◽  
Vol 115 (1-4) ◽  
pp. 279-282 ◽  
Author(s):  
Jeasung Park ◽  
Yu-Taek Seo ◽  
Jong-won Lee ◽  
Huen Lee
Keyword(s):  
Carbon Dioxide ◽  
Silica Gel ◽  
Gas Hydrates ◽  
Spectroscopic Analysis ◽  
Co2 Separation ◽  
Mixed Gas

Modeling Clathrate Hydrate Formation during Carbon Dioxide Injection into the Ocean

1995 ◽  
Vol 29 (1) ◽  
pp. 276-278 ◽  
Author(s):  
Gerald D. Holder ◽  
Anthony V. Cugini ◽  
Robert P. Warzinski
Keyword(s):  
Carbon Dioxide ◽  
Hydrate Formation ◽  
Clathrate Hydrate ◽  
Carbon Dioxide Injection
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