Kinetic of formation for single carbon dioxide and mixed carbon dioxide and tetrahydrofuran hydrates in water and sodium chloride aqueous solution

Sabil, Khalik M.; Duarte, Ana Rita C.; Zevenbergen, J.F.; Ahmad, Mumtaz; Yusup, Suzana; Omar, Abdul Aziz; Peters, Cor J.

doi:10.1016/j.ijggc.2010.05.010

Cited by 58 publications

(53 citation statements)

References 29 publications

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“…In recent years, the kinetic parameters of clathrate hydrate formation (such as induction time, the quantity of gas uptake and growth rate) in the presence of different additives have been studied by many researchers (Arjang et al 2013;Bi et al 2009;Dashti et al 2015;Farhang et al 2014;Fazlali et al 2013;Ganji et al 2007a, b;Kang and Lee 2010;Kumar et al 2013;Lirio et al 2013;Manteghian et al 2013;Mohammadi et al 2014a;Ricaurte et al 2014;Rogers et al 2007;Roosta et al 2015;Sabil et al 2010;Torré et al 2011;Zhang et al 2004Zhang et al , 2007. Mohammadi and coworkers studied the impact of sodium dodecyl sulfate and silver nanoparticles on the kinetic parameters of CO 2 clathrate hydrate formation (Mohammadi et al 2014a).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of (TBAF + CO2) semi-clathrate hydrate formation in the presence and absence of SDS

et al. 2018

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In this communication, the impacts of adding SDS (sodium dodecyl sulfate), TBAF (tetra-n-butylammonium fluoride) and the mixture of SDS ? TBAF on the main kinetic parameters of CO 2 hydrate formation (induction time, the quantity and rate of gas uptake, and storage capacity) were investigated. The tests were performed under stirring conditions at T = 5°C and P = 3.8 MPa in a 169 cm 3 batch reactor. The results show that adding SDS with a concentration of 400 ppm, TBAF with a concentration of 1-5 wt%, and the mixture of SDS ? TBAF, would increase the storage capacity of CO 2 hydrate and the quantity of gas uptake, and decrease the induction time of hydrate formation process. The addition of 5 wt% of TBAF and 400 ppm of SDS would increase the CO 2 hydrate storage capacity by 86.1% and 81.6%, respectively, compared to pure water. Investigation of the impact of SDS, TBAF and their mixture on the rate of gas uptake indicates that the mixture of SDS ? TBAF does not have a significant effect on the rate of gas uptake during hydrate formation process.Keywords Semi-clathrate hydrate Á Gas hydrate Á Kinetics Á CO 2 Á SDS Á TBAF List of symbols P Pressure R Universal gas constant T Temperature V Volume of the gas phase Z Compressibility factor Subscripts 0 Conditions of the cell at time t = 0 i Counter t Time w Water

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Section: Introductionmentioning

confidence: 99%

Kinetics of (TBAF + CO2) semi-clathrate hydrate formation in the presence and absence of SDS

et al. 2018

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“…The results showed that the inclusion of THF reduces the induction time required for hydrate formation. These observations indicated hydrate nucleation process and onset growth were more readily to occur in the presence of THF (Sabil et al, 2010a). Thermodynamically the experimental measurements showed that the addition of THF extended CO 2 hydrate stability region by elevating the hydrate equilibrium temperature at a specified pressure (Sabil et al, 2010b).…”

Section: Additives Used In Co 2 Hydrate Studiesmentioning

confidence: 85%

“…Pressure and temperature curves show that as a certain amount of CO 2 with 500 psi pressure was loaded to the reactor, initially, a sharp decrease of pressure was observed. This sharp decrease in pressure was mainly attributed to the solubility of carbon dioxide in water (Sabil et al, 2010a). Once the liquid phase is saturated with carbon dioxide after a few minutes (induction time) the nucleation occurred and hydrate growth started.…”

Section: Kineticsmentioning

confidence: 99%

“…In comparison with gas hydrate phase equilibrium studies, kinetic data of hydrate formation and dissociation, particularly for CO 2 hydrates, are rather scarce, and the research focus is moving into time-dependent studies of gas hydrates (Sabil et al, 2010a;Torre et al, 2012). Therefore, in this work, an experimental study of carbon dioxide hydrate kinetics has been conducted.…”

Section: Introductionmentioning

confidence: 99%

“…The additives tetrahydrofuran (THF) (Kang et al, 2001b;Lee et al, 2010;Sabil et al, 2010a) , tetra-n-butyl ammonium bromide (TBAB) (Arjmandi et al, 2007;Li et al, 2009aLi et al, , 2010aLi et al, , 2009bLi et al, , 2010b, cyclopentane (CP) (Zhang and Lee, 2009) or silica (Bai et al, 2012) have been tested and used commonly as promoters for CO 2 hydrate formation. Collectively these studies reveal that hydrate nucleation process and onset growth are enhanced by these promoters (Sabil et al, 2010a). Certain promoters elevate the hydrate equilibrium temperature at a specified pressure and certain promoters reduce the formation pressure at a particular temperature.…”

Section: Introductionmentioning

confidence: 99%

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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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Gas hydrate concentration measurements on sucrose solutions using a new pilot test rig

et al. 2020

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A new 750 cm3 pilot test rig based on the “isochoric pressure method” was designed and commissioned for the hydrate measurements to concentrate sucrose solutions. The reactor included an improved agitation system and enabled sampling of the sucrose solutions. The experimental method was validated be performing dissociation measurements for the CO2 + water system. Gas hydrate kinetic and sampling data were measured for the CO2 + sucrose solutions at sucrose concentrations between (12–60) oBrix, within the temperature range of (274.65–276.15) K and at pressures up to 3.70 MPa. Results showed that sucrose is a kinetic inhibitor. The data were modeled to obtain hydrate formation rate, storage capacity, gas consumption and apparent rate constant. Stage‐wise concentration measurements were performed with reactor conditions at 274.65 K, 3.70 MPa and 130 rpm mixer speed with liquid sample withdrawal. A final sucrose product of approximately 60 oBrix was obtained.

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Kinetic of formation for single carbon dioxide and mixed carbon dioxide and tetrahydrofuran hydrates in water and sodium chloride aqueous solution

Cited by 58 publications

References 29 publications

Kinetics of (TBAF + CO2) semi-clathrate hydrate formation in the presence and absence of SDS

Kinetics of (TBAF + CO2) semi-clathrate hydrate formation in the presence and absence of SDS

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

Gas hydrate concentration measurements on sucrose solutions using a new pilot test rig

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