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Type: Artigo de periódico
Title: Phase Segregation, Shear Thinning And Rheological Behavior Of Crude Oil-in-water Emulsions
Author: dos Santos R.G.
Bannwart A.C.
Loh W.
Abstract: This work reports an experimental investigation of the oil segregation effect during the rheological evaluation of concentrated oil-in-water (O/W) emulsions. The results demonstrated that alkyl alcohols can significantly affect the rheological behavior of O/W emulsions. The addition of n-octanol and n-decanol to the emulsifying agent formulation produces a critical shear rate, promotes a sharp break in the flow curves and leads to a sharp viscosity drop, which was attributed to wall depletion. This phenomenon is related to the displacement of the dispersed phase away from the solid-boundary, which generates a low-viscosity oil-depleted layer that acts as a lubricating layer. The incidence of slippage depends on the alkyl-chain length and the concentration of the alcohol. The lubrication layer will promote energy savings during emulsified oil pumping and result in significant economic benefits to the petroleum industry. © 2013 The Institution of Chemical Engineers.
Editor: Institution of Chemical Engineers
Rights: fechado
Identifier DOI: 10.1016/j.cherd.2013.12.002
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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