Hydrophobic Particle Effects on Hydrate Crystal Growth at the Water-Oil Interface

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This study introduced hydrophobic silica nanoparticles (SiNPs) into an interface of aqueous and hydrate-forming oil phases and analyzed the inhibition of hydrate crystal growth after seeding the hydrate slurry. The hydrate inhibition performance was quantitatively identified by micro-differential scanning calorimetry (micro-DSC) experiments. Through the addition of 1.0 wt % of SiNPs into the water-oil interface, the hydrate crystal growth only occurred around the seeding position of cyclopentane (CP) hydrate slurry, and the growth of hydrate crystals was retarded. Upon a further increase in the SiNP concentration up to 2.0 wt %, the SiNP-laden interface completely prevented hydrate growth. We observed a hollow conical shape of hydrate crystals with 0.0 and 1.0 wt % of SiNPs, respectively, but the size and shape of the conical crystals was shrunken at 1.0 wt % of silica nanoparticles. However, the conical shape did not appear with an increased nanoparticle concentration of 2 wt %. These findings can provide insight into hydrate inhibition in oil and gas delivery lines, possibly with nanoparticles.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2014-01
Language
English
Article Type
Article
Keywords

CARBON-DIOXIDE; METHANE HYDRATE; CYCLOPENTANE; SURFACTANTS

Citation

CHEMISTRY-AN ASIAN JOURNAL, v.9, no.1, pp.261 - 267

ISSN
1861-4728
DOI
10.1002/asia.201300905
URI
http://hdl.handle.net/10203/187100
Appears in Collection
CBE-Journal Papers(저널논문)
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