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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.|
|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|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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