Gas sparging to enhance permeate flux and reduce fouling resistances in cross flow microfiltration

Amir Fouladitajar; Farzin Zokaee Ashtiani; Hamid Rezaei; Amin Haghmoradi; Ali Kargari

Journal of Industrial and Engineering Chemistry, Vol.20, No.2, 624-632, March, 2014

DOI10.1016/j.jiec.2013.05.025 Export Citation

Gas sparging to enhance permeate flux and reduce fouling resistances in cross flow microfiltration

Amir Fouladitajar, Farzin Zokaee Ashtiani^†, Hamid Rezaei, Amin Haghmoradi, and Ali Kargari¹

Department of Chemical Engineering, Amirkabir University of Technology, No. 424, Hafez Ave., Tehran, Iran
¹Department of Petrochemical Engineering, Amirkabir University of Technology, Mahshahr Campus, Mahshahr, Iran

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The effects of different two-phase flow patterns on the permeate flux were studied in a microfiltration process. The filtration flux was increased in the slug flow pattern mostly due to the cake reduction and disruption of concentration polarization. Depending on liquid velocity, slug flow enhanced permeability when fouling problem was severe. However, a contrary result was obtained for bubbly flow where gas introduction did almost nothing in higher liquid velocities. Different trends were observed in the dimensionless groups’ plane (N's, Nf), indicating different effects of gas-liquid two-phase flow on the resistances and fouling.

Keywords:Gas-liquid two-phase flow;Slug flow;Gas sparging;Fouling resistance;Shear stress number

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