Interfacial tension of ethylene and aqueous solution of sodium dodecyl sulfate (SDS) in or near hydrate formation region

Luo, Hu; Sun, Chang‐Yu; Huang, Qiang; Peng, Bao-Zi; Chen, Guangjin

doi:10.1016/j.jcis.2005.10.013

Cited by 23 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inner diameter and length of pendant-bubble cell are 3.5 and 3.0 cm, respectively. A high-resolution Panasonic photographic camera was connected to a computer for processing the photographic data using a program developed by our laboratory [13][14][15]. The operating temperature was controlled by three Eurotherm temperature controllers with an uncertainty of ±0.1 K. All the pressure gauges were calibrated using a standard RUSKA dead-weight pressure gauge with an uncertainty of ±0.25%.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

“…The device has been successfully tested in the past to measure interfacial tensions of different systems [13][14][15] and lateral growth rate of hydrate film on the surface of a bubble suspended in aqueous solution [11,12] in our previous work. The experimental procedures for these measurements are briefly described below.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Interfacial properties of methane/aqueous VC-713 solution under hydrate formation conditions

Peng¹,

Sun²,

Liu³

et al. 2009

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

Interfacial properties of methane/aqueous VC-713 solution under hydrate formation conditions

Peng¹,

Sun²,

Liu³

et al. 2009

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

“…The operating temperature was controlled by three Eurotherm temperature controllers with an uncertainty of ±0.1 K. All the pressure gauges were calibrated using a standard RUSKA dead-weight pressure gauge with an uncertainty of ±0.25%. Luo et al 14 and Sun et al 10,15 have used this device to measure the interfacial tension data of C 2 H 4 ＋water system with surfactant, CH 4 ＋water system with surfactant and CO 2 ＋crude oil＋reservoir water system, respectively. Experimental procedures have been described in our previous papers.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

“…Experimental procedures have been described in our previous papers. 10,14,15 Thus only a brief description is given below.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

Adsorption of Methane on Water under Hydrate Formation Conditions

et al. 2009

View full text Add to dashboard Cite

The variation of interfacial tension with pressure has been determined systemically for water in equilibrium with compressed methane at temperature from 274.2 to 282.2 K in the range of pressure from 0.1 to 10.1 MPa using the pendant-drop method. The results show that the interface tension decreased with increasing pressure when temperature was specified. Pressure has a great influence upon the interface tension at higher pressure. The surface excess concentrations of methane on water at different temperatures and pressures were calculated. The results showed that higher pressure and lower temperature corresponded to higher adsorption concentration of methane. At the same time, the surface adsorption free energies of methane were also calculated, indicating that the adsorption of methane on water under hydrate formation condition is more preferable than that at 298.2 K.

show abstract

“…The critical micelle concentration (CMC) of SDS in methane and water solution is about 500 ppm and the interfacial tension remains constant with further increase in SDS concentration. This work was continued by studying the effect of pressure on the CMC of SDS and demonstrated that the CMC and the saturated surface excess concentration decreased with the increase of pressure (Luo et al, 2006). By that time researchers ascribed the effect of SDS on hydrate formation mainly to the formation of micellar aggregates which should help in solubilising the hydrocarbon gases into the micellar core, thus enhancing their solubility in water and hastening the process of hydrate formation (Zhong and Rogers, 2000).…”

Section: Surfactantsmentioning

confidence: 99%

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

Farhang¹

View full text Add to dashboard Cite

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 ...

show abstract

Interfacial tension of ethylene and aqueous solution of sodium dodecyl sulfate (SDS) in or near hydrate formation region

Cited by 23 publications

References 23 publications

Interfacial properties of methane/aqueous VC-713 solution under hydrate formation conditions

Interfacial properties of methane/aqueous VC-713 solution under hydrate formation conditions

Adsorption of Methane on Water under Hydrate Formation Conditions

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

Contact Info

Product

Resources

About