Carbon dioxide clathrate hydrate epitaxial growth: spectroscopic evidence for formation of the simple type-II carbon dioxide hydrate

Fleyfel, F.; Devlin, J. Paul

doi:10.1021/j100162a068

Cited by 149 publications

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“…Fleyfel & Devlin (1991) have grown epitaxially CO 2 clathrate hydrates on the previously grown, structure I or II clathrate hydrates of other molecules and recorded their spectra in the main infrared transitions. The absorption band positions observed in our experiments, shown in Fig.…”

Section: Carbon Dioxide Clathrate Hydrate Identificationmentioning

confidence: 99%

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Carbon dioxide clathrate hydrate FTIR spectrum

Dartois¹,

Schmitt

2009

A&A

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Section: Carbon Dioxide Clathrate Hydrate Identificationmentioning

confidence: 99%

“…Carbon dioxide clathrate hydrate has been investigated for its ability to be epitaxially grown in so-called type I or type II structures (Fleyfel & Devlin 1991). These two structures differ in the size and number of water cages, hence in the potential interaction between the encaged CO 2 and the water cage.…”

Section: Introductionmentioning

confidence: 99%

Carbon dioxide clathrate hydrate FTIR spectrum

Dartois¹,

Schmitt

2009

A&A

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“…One sees in the antisymmetric mode only two broad bands corresponding to the two unequal cages in which CO 2 is trapped. The principal isotope main vibrational band had been recorded previously by Fleyfel & Devlin (1991) and we saturated the known bands to access the isotopes transitions as well as the combinations modes, in Fermi resonance (Fig. 2. left panel).…”

Section: Methane and Carbon Dioxide Spectra Chmentioning

confidence: 99%

Low temperature CH₄ and CO₂ clathrate hydrate near to mid-IR spectra

et al. 2009

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Abstract. The physical behaviour of methane and carbon dioxide clathrate hydrates, specific crystallographic ice crystals are of major importance for the earth and may control the stability of gases in many astrophysical bodies such as the planets, comets and possibly interstellar grains. Such models claim they provide an alternative trapping mechanism modifying the absolute and relative composition of icy bodies and can be at the source of late time injection of gaseous species in planetary atmospheres. However, there is a clear need to detect them directly. We provide in this study the laboratory recorded signatures of clathrate hydrates in the near to midinfrared for astrophysical remote detection. These laboratory experiments will in a near future allow to follow the kinetic formation by diffusion in dedicated experiments, another important step to implement, to understand and model their possible presence in space.

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“…For the first time the results of a spectroscopic study of the epitaxial growth of CO 2 clathrate hydrates on ethylene oxide (EO) and THF clathrate substrates was presented by Fleyfel and Devlin (1991). It was shown that different crystalline clathrate hydrates of CO 2 grow epitaxially on EO and THF clathrate hydrate films, forming simple type-I and type-II structures, respectively.…”

Section: Kinetic Study Of Co 2 Hydratesmentioning

confidence: 99%

“…The mechanism of CO 2 hydrate formation has been the subject of many experimental (Bergeron and Servio, 2008;Chun and Lee, 1996;Fleyfel and Devlin, 1991;Horvat et al, 2012;Malegaonkar et al, 1997;North et al, 1998), computational modeling (Englezos et al, 1987Lund et al, 1994;Shindo et al, 1993) and molecular dynamic (MD) simulation studies (Christiansen and Sloan, 1994;Shindo et al, 1995). Considerable practical research has been focused on the formation of gas hydrates from CO 2 -N 2 and CO 2 -H 2 gas mixtures Kumar et al, 2006;Linga et al, 2007a).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the formation of CO2 hydrates in the presence of sodium halides and hydrophobic fumed silica nanoparticles

Farhang¹

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CO 2 capture by trapping the greenhouse gas in clathrates hydrates is proving to be one of the promising options for long term carbon storage. This technology is desirable as it can be deposited in the deep ocean where the suitable pressure and temperature is ready without any extra cost. To date, this method has mostly been of academic interest because the formation of gas hydrates is very slow and requires lots of energy and resources. It is important therefore to develop an efficient and economical process to be able to apply this method at an industrial scale. Scientists and researchers have been looking for suitable additives to accelerate the formation of CO 2 hydrate. To meet these objectives numerous additives have previously been tested and several were found to be suitable hydrate promoters. The mechanism for the formation of gas hydrates in the presence of additives is not clear yet. Understanding this mechanism would help us to select and synthesise the most suitable and cost effective additive.In this thesis, two groups of chemicals i.e. salt and hydrophobic particles were added to the hydrate formation reactor and examined. Initially sodium halides were tested for their effect on the kinetics of the formation of CO 2 hydrates in an isochoric system. The effect of different anion types and concentrations was investigated by directly measuring pressure and temperature changes in the reactor and evaluating maximum CO 2 uptake, conversion, storage capacity, induction time, and hydrate growth rate. The results indicated that sodium halides at a concentration of 50 mM (mmol/L) increase CO 2 consumption and conversion to hydrates. In addition, sodium iodide and sodium bromide in a range of concentrations between 50 and 250 mM significantly increased the hydrate formation kinetics. Measurements of the surface potential of CO 2 hydrates formed in the presence of sodium halides showed negative charge on hydrates with the highest zeta potential observed at the concentration of 50 mM. The findings of this part of the research led us to propose a mechanism for the formation of CO 2 hydrates in the presence of sodium halides.The second group of additives extensively investigated in the current research were hydrophobic nano-particles. Two types of hydrophobic fumed silica were studied.iii They produced two types of particle stabilised systems when mixed with water (i.e. silica foam and dry water). The influence of particle hydrophobicity and concentration on hydrate formation kinetics was established by monitoring gas consumption, CO 2 conversion and induction time. The morphology, microstructure, and pore characteristics were elucidated by cryogenic scanning electron microscopy (cryo-SEM), and the elemental distribution and composition were determined by X-ray energy dispersive spectroscopy (EDS). The results indicated that the promoting effect of hydrophobic fumed silica was dependent on the particle hydrophobicity and on the weight ratio of silica to water. The kinetics of CO 2 hydrate formation were ...

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Carbon dioxide clathrate hydrate epitaxial growth: spectroscopic evidence for formation of the simple type-II carbon dioxide hydrate

Cited by 149 publications

References 0 publications

Carbon dioxide clathrate hydrate FTIR spectrum

Carbon dioxide clathrate hydrate FTIR spectrum

Low temperature CH₄ and CO₂ clathrate hydrate near to mid-IR spectra

Kinetics of the formation of CO2 hydrates in the presence of sodium halides and hydrophobic fumed silica nanoparticles

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Carbon dioxide clathrate hydrate epitaxial growth: spectroscopic evidence for formation of the simple type-II carbon dioxide hydrate

Cited by 149 publications

References 0 publications

Carbon dioxide clathrate hydrate FTIR spectrum

Carbon dioxide clathrate hydrate FTIR spectrum

Low temperature CH4 and CO2 clathrate hydrate near to mid-IR spectra

Kinetics of the formation of CO2 hydrates in the presence of sodium halides and hydrophobic fumed silica nanoparticles

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Low temperature CH₄ and CO₂ clathrate hydrate near to mid-IR spectra