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On nonequilibrium shrinkage of supercritical CO2 droplets in a water-carrier microflow

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dc.contributor.authorQin, Ning
dc.contributor.authorWen, John Z.
dc.contributor.authorChen, Baixin
dc.contributor.authorRen, Carolyn L.
dc.date.accessioned2018-12-11T15:42:32Z
dc.date.available2019-07-16
dc.date.issued2018-07-16
dc.descriptionThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Applied Physics Letters, 113(3), 033703 and may be found at https://doi.org/10.1063/1.5039507.en
dc.description.abstractWe report an experimental study on the hydrodynamic shrinkage of supercritical carbon dioxide (scCO(2)) microdroplets during a nonequilibrium process. After scCO(2 )microdroplets are generated by water shearing upon a scCO(2) flow in a micro T-junction, they are further visualized and characterized at the midpoint and the ending point of a straight rectangular microchannel (width x depth x length: 150 mu m x 100 mu m x 1.5 mm). The measured decreases in droplet size by 8%-36% indicate and simply quantify the droplet shrinkage which results from the interphase mass transfer between the droplet and the neighboring water. Using a mathematical model, the shrinkage of scCO(2) droplets is characterized by solvent-side mass transfer coefficients (k(s): 1.5 x 10(-4)-7.5 x 10(-4) m/s) and the Sherwood number (Sh: 7-37). In general, k(s) here is two orders of magnitude larger than that of hydrostatic liquid CO2 droplets in water. The magnitude of Sh numbers highlights the stronger effect of local convections than that of diffusion in the interphase mass transfer. Our results, as reported here, have essential implications for scCO(2)-based chemical extractions and carbon storage in deep geoformations. Published by AIP Publishing.en
dc.description.sponsorshipCarbon Management Canada: C393en
dc.identifier.urihttps://doi.org/10.1063/1.5039507
dc.identifier.urihttp://hdl.handle.net/10012/14215
dc.language.isoenen
dc.publisherAIP Publishingen
dc.subjectcarbon-dioxide extractionen
dc.subjectmass-transferen
dc.subjecthigh-pressureen
dc.subjectinterfacial-tensionen
dc.subjectdissolutionen
dc.subjectsolubilityen
dc.subjectliquiden
dc.subjectflowen
dc.subjectmicrofluidicsen
dc.subjectsequestrationen
dc.titleOn nonequilibrium shrinkage of supercritical CO2 droplets in a water-carrier microflowen
dc.typeArticleen
dcterms.bibliographicCitationQin, N., Wen, J. Z., Chen, B., & Ren, C. L. (2018). On nonequilibrium shrinkage of supercritical CO2 droplets in a water-carrier microflow. Applied Physics Letters, 113(3), 033703. doi:10.1063/1.5039507en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Mechanical and Mechatronics Engineeringen
uws.contributor.affiliation2Waterloo Institute for Nanotechnology (WIN)en
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.scholarLevelGraduateen
uws.typeOfResourceTexten
uws.typeOfResourceTexten

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