Hou, Lei, Sun, Baojiang, Geng, Xueyu , Jiang, Tingxue and Wang, Zhiyuan (2016) Study of the slippage of particle / supercritical CO2 two-phase flow. Journal of Supercritical Fluids . doi:10.1016/j.supflu.2016.09.016

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Abstract

In this paper, the slippage velocity and displacement between particles and supercritical CO2 (SC-CO2) were studied to reveal the particle-SC-CO2 two-phase flow behavior. Visualization experiments were performed to directly measure the slippage velocity and displacement. Eight groups of experiments involving various pressures (7.89–10.96 MPa), temperatures (38.6–47.5 °C), particle diameters (0.3–0.85 mm), particle densities (2630 and 3120 kg/m3) and SC-CO2 flow rates (0.920–1.284 m/s) were conducted. The measured particle slippage velocities in the flowing direction were approximately 10.3% of the SC-CO2 flow rate. The measured particle slippage displacements were all at the centimeter level, which indicated that SC-CO2 had a superior particle transporting capability that was similar to those of liquids even if it had a low viscosity that was similar to those of gases. A numerical model was built, and analytic slippage calculations were performed for SC-CO2 for additional analyses. The density of SC-CO2 was found to have a greater influence on the slippage than the viscosity. Moreover, a comparison of the slippage between SC-CO2 and water showed that the particle slippage in water was constant, while the particle slippage in SC-CO2 continually accumulated at an extremely slow rate.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Supercritical fluids
Journal or Publication Title:	Journal of Supercritical Fluids
Publisher:	Elsevier
ISSN:	0896-8446
Official Date:	28 September 2016
Dates:	Date Event 28 September 2016 Published 20 September 2016 Accepted 28 April 2016 Submitted
Date of first compliant deposit:	10 October 2016
DOI:	10.1016/j.supflu.2016.09.016
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC)
Grant number:	U1262202, 5121006

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