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Effect of Shear Stress on Deoiling of Oil‐Contaminated Catalysts in a Hydrocyclone
Author(s) -
Xu Yinxiang,
Liu Yi,
Zhang Yanhong,
Yang Xuejing,
Wang Hualin
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500378
Subject(s) - hydrocyclone , shear stress , shear rate , shear (geology) , oil field , crude oil , petroleum engineering , geotechnical engineering , materials science , geology , composite material , mechanics , rheology , physics
Abstract Shear stress provided by a hydrocyclone was employed to remove the oil from oil‐contaminated catalysts. Understanding the deoiling mechanism and quantitative analysis of the interaction between shear stress fields and deoiling are necessary to improve deoiling efficiency. A numerical simulation was conducted for the velocity field and shear stress field of a hydrocyclone. The shear stress field in the wall layer, where oil‐contaminated catalysts are usually located, was robust. Increasing inlet flow rates resulted in a higher shear rate distribution along the wall layer. Numerical results were compared with experimental data. In the deoiling process, higher shear stress rates promoted faster transport of oil from catalysts into the fluid, thereby increasing the deoiling efficiency. Deoiling by the shear stress of a hydrocyclone is an efficient method for cleaning oil‐contaminated catalysts within a short time.