Kinetics of methane hydrate formation in the presence of activated carbon and nano-silica suspensions in pure water

Govindaraj, Varun; Mech, Deepjyoti; Pandey, Gaurav; Nagarajan, R.; Sangwai, Jitendra S.

doi:10.1016/j.jngse.2015.07.011

Cited by 94 publications

(73 citation statements)

References 27 publications

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“…Govindaraj et al. compared the formation kinetics in the presence of a suspension of activated carbon and nano‐silica . Although both systems have promoting effects on methane hydrate formation kinetics, the effect of activated carbon was significantly more pronounced (induction time in the presence of activated carbon is around 30 min, while for nano‐silica is around 84 min).…”

Section: Methane Hydrate In Confined Spacesmentioning

confidence: 99%

Methane Hydrate in Confined Spaces: An Alternative Storage System

2018

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Methane hydrate inheres the great potential to be a nature-inspired alternative for chemical energy storage, as it allows to store large amounts of methane in a dense solid phase. The embedment of methane hydrate in the confined environment of porous materials can be capitalized for potential applications as its physicochemical properties, such as the formation kinetics or pressure and temperature stability, are significantly changed compared to the bulk system. We review this topic from a materials scientific perspective by considering porous carbons, silica, clays, zeolites, and polymers as host structures for methane hydrate formation. We discuss the contribution of advanced characterization techniques and theoretical simulations towards the elucidation of the methane hydrate formation and dissociation process within the confined space. We outline the scientific challenges this system is currently facing and look on possible future applications for this technology.

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Section: Methane Hydrate In Confined Spacesmentioning

confidence: 99%

Methane Hydrate in Confined Spaces: An Alternative Storage System

2018

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“…In eqn (18), n H CH4 is the molar quantity of methane in the hydrate phase and n G CH4 is the molar quantity of methane in the initial gas.…”

Section: S:frmentioning

confidence: 99%

“…10 In research, the key scientic problems in the hydrate method of separation of gas mixtures are how to speed up the rate of hydrate separation, increase the gas storage capacity of hydrates, and improve the rate of recovery of methane to increase the selectivity of separation. 11 As a result, in order to improve the performance of hydrate separation of gas mixtures, some researchers have proposed a variety of methods, such as the addition of a promoter (SDS, 12 THF, 13 TBAB, 14 or TBAF 15 ) or porous materials (silica, 16 carbon nanotubes, 17 activated carbon, 18 nanoparticles, 19 dry gels, 20 foams, 21 hydrogels, 22 or polymers 23 ), mechanical stirring (bubbling, 24 stirring, 25 or spraying 26 ) and changing the thermodynamic conditions (increasing the pressure 27 or lowering the temperature 28 ). In the above studies, some researchers have also compared different methods of promoting hydrate formation.…”

Section: Introductionmentioning

confidence: 99%

Effect of dry water on methane separation and recovery from coal mine gas based on hydrate

Zhang

et al. 2018

RSC Adv.

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“…It is an inorganic polymer has poor interactions with non polar organic compounds Hence, silica particles are being loaded with linoleic acid through the process of grafting for separation and preconcentration of pesticides. Linoleic acid has got attention as organic modifier due to its properties of hydrophobicity, polar group, easy preparation and conjugated structure [1][2][3]. Organochlorine pesticides are the group of human-made pesticides which are cyclic polychlorinated molecules contain carbon, hydrogen and chlorine.…”

Section: Introductionmentioning

confidence: 99%

Grafting of Silica Particles with Linoleic Acid via Modified Stober’s Method for Preconcenrtration of Pesticides in Drinking Water

Atta

Fatima

Islam

et al. 2018

KEM

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The extensive use of pesticides in agricultur has raised toxicity level in environment because of their mutagenic and carcinogenic activity. A sensitive technique is needed to develop for the detection of pesticides to get high sensitivity and selectivity in complex matrices. Modified Stober‘s method was used for the synthesis of pure SiO2 particles and grafted by linoleic acid. Grafted SiO2 were examined for its capability as a sorbent for removal and preconcentration of four organochlorine pesticides i.e. endrin, dieldrin, aldrin and DDT. The particles of SiO2 undergo hydrophobic interaction with linoleic acid by grafting. Both pure SiO2 and linoleic acid grafted SiO2 particles were characterized by SEM, FTIR and XRD. FTIR confirmed the grafting of SiO2 with linoleic acid. XRD and SEM results showed monodispersed and spherical SiO2 particles. The evaluation of grafted SiO2 was carried out by spiking organochlorine pesticides in drinking water. The grafted SiO2 particles could be used as a sorbent in solid phase extraction followed by high performance liquid chromatography with reverse phase C18 column with aqueous acetonitrile as a mobile phase with ultraviolet detector at 224 nm. The percent recoveries for aldrin, dieldin, endrin and DDT were 81, 52, 60 and 91%, respectively.

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Kinetics of methane hydrate formation in the presence of activated carbon and nano-silica suspensions in pure water

Cited by 94 publications

References 27 publications

Methane Hydrate in Confined Spaces: An Alternative Storage System

Methane Hydrate in Confined Spaces: An Alternative Storage System

Effect of dry water on methane separation and recovery from coal mine gas based on hydrate

Grafting of Silica Particles with Linoleic Acid via Modified Stober’s Method for Preconcenrtration of Pesticides in Drinking Water

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