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Incipient motion behavior of the settled particles in supercritical CO2

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Hou, Lei, Bian, Xiaobing, Geng, Xueyu, Sun, Baojiang, Liu, Honglei and Jia, Wenfeng (2019) Incipient motion behavior of the settled particles in supercritical CO2. Journal of Natural Gas Science and Engineering, 68 . 102900. doi:10.1016/j.jngse.2019.102900 ISSN 1875-5100.

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Official URL: http://dx.doi.org/10.1016/j.jngse.2019.102900

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Abstract

The incipient motion process of settled particles in supercritical CO2 was studied through experimental measurements and force analyses. By referring to the theories of sand-wind and sediment restarting, the incipient motion state description and mechanism were optimized to fill the theoretical gaps in particle restarting research in the petroleum industry. Visualization experiments were carried out under various temperature, pressure, and particle conditions. The critical pump rates for the onset of grain motion in supercritical CO2 were measured. A critical pump rate empirical formula was obtained based on the experimental results and a derived Shields number expression. The average critical Shields number in supercritical CO2 was 0.0028. The cohesive force on particles is zero in supercritical CO2 based on its non-interfacial-tension characteristic. The measured spinning rate of the restarting particles in supercritical CO2 was 121 r/s on average. Therefore, the calculated value of the Magnus force was approximately 30% of the force of gravity on particle. Particle incipient motion in supercritical CO2 has a varying driving force (Magnus force) and simple resistant force (lack of cohesive force), which enhances the incipient motion of particles in supercritical CO2.

Item Type: Journal Article
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Carbon dioxide, Particles
Journal or Publication Title: Journal of Natural Gas Science and Engineering
Publisher: Elsevier Inc.
ISSN: 1875-5100
Official Date: August 2019
Dates:
DateEvent
August 2019Published
4 June 2019Available
29 May 2019Accepted
Volume: 68
Article Number: 102900
DOI: 10.1016/j.jngse.2019.102900
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 13 June 2019
Date of first compliant Open Access: 4 June 2020
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
846775H2020 European Research Councilhttp://dx.doi.org/10.13039/100010663
2016ZX05061[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
2017ZX05005[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
P17014-6China Petrochemical CorporationUNSPECIFIED

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