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Title: Demulsification of water/oil/solid emulsions by hollow-fiber membranes

Abstract

The demulsification techniques investigated use preferential surface wetting to allow separation of oil and water phases in ultrafiltration and microfiltration membranes. A hydrophobic membrane allows the permeation of an oil phase at almost zero pressure and retains the water phase, even though the molecular weight of the water molecule (18) is much smaller than that of the oil molecule (198 for tetradecane, used in this study). Hydrophobic membranes having pore sizes from 0.02 to 0.2 {micro}m were tested for demulsification of water-in-oil emulsions and water/oil/solid mixtures. The dispersed (aqueous)-phase drop sizes ranged from 1 to 5 {micro}m. High separation rates, as well as good permeate quality, were obtained with microfiltration membranes. Water content of permeating oil was 32--830 ppm depending on operating conditions and interfacial properties. For emulsions with high surfactant content, simultaneous operation of a hydrophobic and hydrophilic membrane, or simultaneous membrane separation with electric demulsification was more efficient in obtaining complete phase separation.

Authors:
; ;  [1]
  1. Rutgers Univ., Piscataway, NJ (United States). Dept. of Chemical and Biochemical Engineering
Publication Date:
OSTI Identifier:
253785
Resource Type:
Journal Article
Journal Name:
AIChE Journal
Additional Journal Information:
Journal Volume: 42; Journal Issue: 5; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; OILS; MEMBRANE TRANSPORT; PETROLEUM REFINERIES; WATER TREATMENT; DEMULSIFICATION; MIXTURES; SURFACTANTS; WASTE WATER

Citation Formats

Tirmizi, N P, Raghuraman, B, and Wiencek, J. Demulsification of water/oil/solid emulsions by hollow-fiber membranes. United States: N. p., 1996. Web. doi:10.1002/aic.690420508.
Tirmizi, N P, Raghuraman, B, & Wiencek, J. Demulsification of water/oil/solid emulsions by hollow-fiber membranes. United States. https://doi.org/10.1002/aic.690420508
Tirmizi, N P, Raghuraman, B, and Wiencek, J. Wed . "Demulsification of water/oil/solid emulsions by hollow-fiber membranes". United States. https://doi.org/10.1002/aic.690420508.
@article{osti_253785,
title = {Demulsification of water/oil/solid emulsions by hollow-fiber membranes},
author = {Tirmizi, N P and Raghuraman, B and Wiencek, J},
abstractNote = {The demulsification techniques investigated use preferential surface wetting to allow separation of oil and water phases in ultrafiltration and microfiltration membranes. A hydrophobic membrane allows the permeation of an oil phase at almost zero pressure and retains the water phase, even though the molecular weight of the water molecule (18) is much smaller than that of the oil molecule (198 for tetradecane, used in this study). Hydrophobic membranes having pore sizes from 0.02 to 0.2 {micro}m were tested for demulsification of water-in-oil emulsions and water/oil/solid mixtures. The dispersed (aqueous)-phase drop sizes ranged from 1 to 5 {micro}m. High separation rates, as well as good permeate quality, were obtained with microfiltration membranes. Water content of permeating oil was 32--830 ppm depending on operating conditions and interfacial properties. For emulsions with high surfactant content, simultaneous operation of a hydrophobic and hydrophilic membrane, or simultaneous membrane separation with electric demulsification was more efficient in obtaining complete phase separation.},
doi = {10.1002/aic.690420508},
url = {https://www.osti.gov/biblio/253785}, journal = {AIChE Journal},
number = 5,
volume = 42,
place = {United States},
year = {1996},
month = {5}
}