Enhancement of Volumetric Mass Transfer Coefficient for Oxygen Transfer Using Fe203-Water Nanofluids

Manikandan, S.; Karthikeyan, N.; Suganthi, K.S.; Rajan, K.S.
November 2012
Asian Journal of Scientific Research;2012, Vol. 5 Issue 4, p271
Academic Journal
Experiments were carried out with Fe2O3-water nanofluids to study possible enhancement in volumetric mass transfer coefficient for transfer of oxygen from air bubble to nanofluid, in an agitated, aerated bioreactor. The nanoparticles concentration was varied in the range of 0.022 to 0.065 wt.%, while the reactor was operated at three operating conditions viz. 200 rpm and 1.5 L min-1 of air flow, 100 rpm and 1.5 L min-1 of air flow and 200 rpm and 0.75 L min-1 of air flow. Nanoparticles were found to contribute to enhance oxygen transfer through 'grazing effect'. An enhancement of 63% was observed for 0.065 wt.% Fe2O3-water operated at 200 rpm and 0.75 L min-1 air flow


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