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Fabrication of carbon membrane and microfiltration of oil-in-water emulsion: An investigation on fouling mechanisms

Authors
Journal
Separation and Purification Technology
1383-5866
Publisher
Elsevier
Publication Date
Volume
57
Issue
2
Identifiers
DOI: 10.1016/j.seppur.2007.04.024
Keywords
  • Carbon Membrane
  • Microfiltration
  • Oil-In-Water
  • Fouling Mechanism

Abstract

Abstract An experimental investigation was carried out on microfiltration of oil-in-water emulsion using the coal-based carbon membrane prepared by carbonization of tubular precursor through extrusion method. Experimental results show that coal is a good precursor for preparation of the carbon membrane, and treatment of oil-in-water emulsion using the carbon membrane is feasible and effective with the oil rejection efficiency being over 98%. Based on the modified Hermia's model, membrane fouling mechanisms were analyzed and resistance controlling factors of permeate flow were discussed. Under the present operating conditions, there is a switch of fouling mechanisms from the standard pore fouling to the cake filtration at small apparent flow rate and trans-membrane pressure difference. When the values of two parameters are raised, the intermediate pore fouling becomes dominant after the early period of cake filtration.

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