Experimental study on flow characters of CH3CCl2F hydrate slurry

Wang, Wuchang; Fan, Shuanshi; Liang, Deqing; XiangYang, Yang

doi:10.1016/j.ijrefrig.2007.09.003

Cited by 36 publications

(22 citation statements)

References 9 publications

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“…This can both solve the flow assurance issues and reduce the cost of oil field development. Additionally, hydrate slurry flow also occurs in other applications based on gas hydrates, such as the continuous separation of gas mixtures via hydrate formation [5,6], refrigeration using hydrate slurries as a kind of cool storage material [7,8], etc. The characteristics of formation and dissociation of hydrate slurries is of importance for hydrate inhibition and corresponding applications.…”

Section: Introductionmentioning

confidence: 99%

Hydrate Formation/Dissociation in (Natural Gas + Water + Diesel Oil) Emulsion Systems

et al. 2013

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Abstract:Hydrate formation/dissociation of natural gas in (diesel oil + water) emulsion systems containing 3 wt% anti-agglomerant were performed for five water cuts: 5, 10, 15, 20, and 25 vol%. The natural gas solubilities in the emulsion systems were also examined. The experimental results showed that the solubility of natural gas in emulsion systems increases almost linearly with the increase of pressure, and decreases with the increase of water cut. There exists an initial slow hydrate formation stage for systems with lower water cut, while rapid hydrate formation takes place and the process of the gas-liquid dissolution equilibrium at higher water cut does not appear in the pressure curve. The gas consumption amount due to hydrate formation at high water cut is significantly higher than that at low water cut. Fractional distillation for natural gas components also exists during the hydrate formation process. The experiments on hydrate dissociation showed that the dissociation rate and the amount of dissociated gas increase with the increase of water cut. The variations of temperature in the process of natural gas hydrate formation and dissociation in emulsion systems were also examined.

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Section: Introductionmentioning

confidence: 99%

Hydrate Formation/Dissociation in (Natural Gas + Water + Diesel Oil) Emulsion Systems

et al. 2013

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“…3 We first focus on Model I. It can be seen that during the initial phase the Model I results are quite similar to those produced by Model I when including only the nucleation and growth terms (Figure 4).…”

Section: Aggregation and Breakagementioning

confidence: 63%

“…Unnormalized particle size distributions are available from the experimental results of Wang et al 3 for the three hydrate-phase volume fractions of 9.8, 20.2 and 28.5%. To compare them with the results from our model, these experimental distributions were normalized using the trapezoidal rule.…”

Section: Particle Size Distributionmentioning

confidence: 99%

“…Naturally formed hydrates are thought to constitute a potentially important future energy source when conventional oil and gas resources are exhausted. 2 Gas hydrates may be formed technologically for usage in refrigeration systems, 3 transportation of natural gas in the form of hydrate 4 and water desalination. 5 On the other hand, hydrates constitute a problem during oil and gas processing and transportation: once hydrate nuclei are formed in a pressurized pipeline they may grow increasing the concentration of solids in the flowing fluid.…”

Section: Introductionmentioning

confidence: 99%

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Population balance model for nucleation, growth, aggregation, and breakage of hydrate particles in turbulent flow

2009

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This article describes a computational model for the size evolution of hydrate particles in a pipeline-pump system with turbulent flow. The model is based on the population balance principle, and the simulation results were validated with data from an experimental study of a flow loop containing hydrate particles reported in the literature. It is found that the particle size is significantly influenced by aggregation and breakage, related to shear in the flow, and that these effects are comparable to those of growth and nucleation, related to diffusional processes. Two different approaches for hydrate growth and nucleation, one of continuous nucleation during the process and one of only an initial nucleation-pulse, were used. This was done to compare the aggregation and breakage parameters which come out when fitting the models output to experiment. These two approaches are found to give rise to similar aggregation/ breakage parameters, lending credence to the pbm-based modeling. V

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“…Some of these materials are widely used in the refrigeration industry (Wang et al, 2008). Wang et al (2008) studied the turbulent flow of HCFC hydrates in a low-pressure flow loop, involving the measurement of pressure gradients in the slurry and calculation of the pipeline friction factors. A series samples were obtained from the flowing suspension for determining the hydrate particle size distributions.…”

Section: Introductionmentioning

confidence: 99%