An intelligent equation for methane hydrate growth kinetics

Natural gas hydrates are widely considered one of the most promising green resources with large reserves. Most natural gas hydrates exist in deep-sea porous sediments. In order to achieve highly efficient exploration of natural gas hydrates, a fundamental understanding of hydrate growth becomes highly significant. Most hydrate film growth studies have been carried out on the surface of fluid droplets in in an open space, but some experimental visual works have been performed in a confined porous space. In this work, the growth behavior of methane hydrate film on pore interior surfaces was directly visualized and studied by using a transparent high-pressure glass microfluidic chip with a porous structure. The lateral growth kinetics of methane hydrate film was directly measured on the glass pore interior surface. The dimensionless parameter (−∆G/(RT)) presented by the Gibbs free energy change was used for the expression of driving force to explain the dependence of methane hydrate film growth kinetics and morphology on the driving force in confined pores. The thickening growth phenomenon of the methane hydrate film in micropores was also visualized. The results confirm that the film thickening growth process is mainly determined by water molecule diffusion in the methane hydrate film in glass-confined pores. The findings obtained in this work could help to develop a solid understanding on the formation and growth mechanisms of methane hydrate film in a confined porous space.

Download Full-text

Modeling Growth Kinetics of Methane Hydrate in Stirred Tank Batch Reactors

ACS Engineering Au ◽

10.1021/acsengineeringau.1c00012 ◽

2021 ◽

Author(s):

Divya Gootam ◽

Namrata Gaikwad ◽

Rajnish Kumar ◽

Niket Kaisare

Keyword(s):

Growth Kinetics ◽

Methane Hydrate ◽

Stirred Tank ◽

Batch Reactors ◽

Kinetics Of ◽

Modeling Growth

Download Full-text

Effects of Micellization on Growth Kinetics of Methane Hydrate

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.7b00328 ◽

2017 ◽

Vol 56 (13) ◽

pp. 3687-3698 ◽

Cited By ~ 19

Author(s):

Gaurav Bhattacharjee ◽

Omkar Singh Kushwaha ◽

Asheesh Kumar ◽

Muzammil Yusuf Khan ◽

Jay Narayan Patel ◽

...

Keyword(s):

Growth Kinetics ◽

Methane Hydrate ◽

Kinetics Of

Download Full-text

Study on methane hydrate formation in gas–water systems with a new compound promoter

RSC Advances ◽

10.1039/c9ra06467b ◽

2019 ◽

Vol 9 (57) ◽

pp. 33506-33518

Author(s):

Xiaofang Lv ◽

Dayong Lu ◽

Yang Liu ◽

Shidong Zhou ◽

Jiangwei Zuo ◽

...

Keyword(s):

Growth Kinetics ◽

Methane Hydrate ◽

Constant Pressure ◽

Hydrate Formation ◽

Water Systems ◽

Methane Hydrates ◽

Kinetics Of

The effects of a new promoter on the growth kinetics of methane hydrates were investigated using a visualized constant-pressure autoclave.

Download Full-text

The Ordered Phase Formation in Ti-Al-Ga Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069193 ◽

1970 ◽

Vol 28 ◽

pp. 440-441

Author(s):

Shiro Fujishiro ◽

Harold L. Gegel

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Titanium Alloys ◽

Growth Kinetics ◽

Stoichiometric Composition ◽

Good Potential ◽

Alpha Titanium ◽

Cold Rolled ◽

Kinetics Of ◽

Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Download Full-text

Growth Kinetics of Quantum Size ZnO Particles

MRS Proceedings ◽

10.1557/proc-536-347 ◽

1998 ◽

Vol 536 ◽

Author(s):

E. M. Wong ◽

J. E. Bonevich ◽

P. C. Searson

Keyword(s):

Growth Kinetics ◽

Ostwald Ripening ◽

Chemical Potential ◽

Colloidal Suspensions ◽

Green Emission ◽

Blue Shift ◽

Constant Current ◽

Mass Model ◽

Zno Particles ◽

Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

Download Full-text