Rheological properties of tetra-n-butylphosphonium bromide hydrate slurry flow

Clain, Pascal; Delahaye, Anthony; Fournaison, Laurence; Mayoufi, Nadia; Dalmazzone, Didier; Fürst, Walter

doi:10.1016/j.cej.2012.04.027

Cited by 71 publications

(40 citation statements)

References 23 publications

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“…Their high latent heat of fusion combined with their capacity both to encapsulate large amounts of gas and to selectively remove certain components from gas mixtures render gas hydrates potentially useful in various industrial processes. Applications include refrigeration (Clain et al, 2012), energy storage (Belosludov et al, 2007), energy transportation (Gudmundsson et al, 1999), capture of greenhouse gases (Adeyemo et al, 2010), and gas separation (Ricaurte et al, 2014a). Achieving formation of a large amount of hydrate at a high enough rate is generally one of the key challenges for ensuring the economic viability of gas hydrate-based processes.…”

Section: Introductionmentioning

confidence: 99%

Influence of the carbon chain length of a sulfate-based surfactant on the formation of CO2, CH4 and CO2–CH4 gas hydrates

Dicharry

Diaz

Torré

et al. 2016

Chemical Engineering Science

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Influence of the carbon chain length of a sulfate-based surfactant on the formation of CO 2 , CH 4 and CO 2 -CH 4 gas hydrates, Chemical Engineering Science, http://dx. AbstractThis study investigates how the length of the carbon chain of homologous surfactants affects the amount and growth rate of gas hydrates formed in quiescent CO 2 /CH 4 /water systems. The 1 Present address: PDVSA Intevep, Los Teques -Edo. Miranda, Apto 76343, Caracas 1070-A, Venezuela 2 hydrate formation experiments were conducted using sodium alkyl sulfates with different carbon-chain lengths (C 8 , C 10 , C 11 , C 12 , C 13 , C 14 , C 16 and C 18 ), at a concentration of 10.4 mol.m -3 .The CO 2 :CH 4 ratios investigated were 0:100, 25:75, 75:25, and 100:0. Hydrate formation was studied in a batch reactor at an initial subcooling of about 5 K. It was observed to be efficient only for those surfactants that promoted the formation of a water-wettable porous hydrate structure, which spreads over the inner sidewalls of the hydrate-formation cell. For the CO 2 :CH 4 ratios of 0:100, 25:75, 75:25 and 100:0, hydrate formation was efficient for the surfactants with respectively 8 to 14, 11 to 13, 11 to 12, and 12 carbon atoms in their alkyl chain. Only the surfactant with 12 carbon atoms was found to promote and accelerate hydrate growth for all the gas-phase compositions tested. The much lesser surfactant effect on hydrate growth rate observed with the increase in the initial CO 2 fraction in the gas phase is ascribed to a modification of the adsorption behavior of the surfactant molecules on the hydrate surface, which, as already suggested by Zhang et al. (2010), is probably due to competitive adsorption between the surfactant anions and bicarbonate.

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Section: Introductionmentioning

confidence: 99%

Influence of the carbon chain length of a sulfate-based surfactant on the formation of CO2, CH4 and CO2–CH4 gas hydrates

Dicharry

Diaz

Torré

et al. 2016

Chemical Engineering Science

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“…4 with a comparison with some previous works on TBPB hydrate slurries [1] and CO 2 hydrate slurries [2].…”

Section: Mixed Co 2 -Tbpb Hydrate Slurrymentioning

confidence: 87%

“…6, the variation of the apparent viscosity of simple and mixed hydrate slurries for a volume solid fraction between 0 and 16% is presented. The shear rate is fixed at 400 s -1 and compared to the results obtained for CO 2 [2], TBPB [1] and CO 2 with SDS (Sodium Dodecyl Sulphate -anti-agglomerate surfactant) [3] hydrate slurries. The simple hydrate slurries (gas or salt) exhibit a conventional shear-thinning behaviour.…”

Section: Mixed Co 2 -Tbpb Hydrate Slurrymentioning

confidence: 99%

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Rheological study on CO2 hydrate slurries for secondary refrigeration

Salehy¹,

Clain²,

Boufarès³

et al. 2017

energetika

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To help the fight against climate change, the Kigali deal has planned to eliminate hydrofluorocarbon's use (HFC) in industrial systems. HFCs are powerful greenhouse gases with a high global warming potential. Moreover, HFCs are commonly used as a refrigerant within secondary refrigeration processes for cold production. A solution to limit their negative environmental impact would be to reduce the amount of HFC by using a phase change slurries (PCS) in the secondary loop. A PCS is composed of solid phase change particles (solid-liquid) in a liquid transportation phase. Clathrate hydrates are crystalline particles where gas molecules are trapped in water cages. Due to their high energy densities, hydrate slurries, in particular CO 2 hydrates, are relevant twophase secondary fluids because they enhance the energy efficiency of secondary refrigeration systems. In this study, the rheological behaviour of CO 2 hydrate slurries in various experimental conditions on a dynamic loop for cold distribution was investigated. An exhaustive state-of-the-art rheological study of hydrate slurries in aqueous solution has pointed out that hydrate slurries are non-Newtonian fluids. However, the rheological behaviour could be different for the same kind of hydrate slurry according to the literature. Moreover, the literature review also highlighted that the most used measurement method for the apparent viscosity is the capillary viscometer. We used a semi-empirical Herschel-Bulkley's model for determining the apparent viscosity of the CO 2 hydrate slurry as a function of the hydrate slurry fraction. This work is primordial for designing and sizing a new efficient refrigeration system based on this innovative material.

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“…In addition, the particles agglomerate and disperse in the slurry, imparting non-Newtonian characteristics to the slurry. [5][6][7][8][9] To increase slurry fluidity, the addition of surfactants that form drag-reducing rod-like micelles [10][11][12][13][14][15] , polymers 3,16) , and some types of brines 1,9,17,18) have been tested to prevent particle agglomeration. These additives also enhance the non-Newtonian behavior of the slurries.…”

Section: Introductionmentioning

confidence: 99%