TiO2 nanofluid for oxygen mass transfer intensification in pulsed plate column

Volumetric oxygen mass transfer coefficient is a decisive parameter for the selection of any contactor as an aerobic bioreactor. A pulsed plate column with fixed bed of solids in interplate spaces is a recent innovation in the field of immobilized cell bioreactors. Volumetric oxygen mass transfer coefficients are determined in a three-phase pulsed plate column involving air and water phases and with a fixed bed of glass particles, which can serve as a surface for cell immobilization packed in the interplate spaces. The volumetric mass transfer coefficients obtained in this column range from 0.067 to 0.1495 s-1 in the range of air superficial velocities from 0.011 to 0.047m/s and vibrational velocities from 0.825 to 6cm/s. Volumetric oxygen mass transfer coefficient has increased with the increase in superficial air velocity and vibrational velocity. Empirical correlation relating kLa with these variables was developed. The volumetric oxygen mass transfer coefficient values in the three-phase pulsed plate column are found to be similar or higher than the literature reported values for conventional two-phase pulsed plate columns. The values of volumetric oxygen mass transfer coefficients in the three-phase pulsed plate column are of higher order of magnitude than the literature reported values of volumetric oxygen mass transfer coefficient for many other three-phase gas-liquid-solid reactors. The pulsed plate column with fixed bed of solids is proven to have all the potential to be used as an aerobic bioreactor with immobilized cells due to its better gas-liquid mass transfer characteristics.

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Oxygen mass transfer in a 16.6 cm i.d. multiphase reciprocating plate column

Journal of the Serbian Chemical Society ◽

10.2298/jsc0705523v ◽

2007 ◽

Vol 72 (5) ◽

pp. 523-531 ◽

Cited By ~ 2

Author(s):

Ljubisa Vasic ◽

Ivana Bankovic-Ilic ◽

Miodrag Lazic ◽

Vlada Veljkovic ◽

Dejan Skala

Keyword(s):

Mass Transfer ◽

Transfer Coefficient ◽

Solid Particles ◽

Oxygen Mass Transfer ◽

Column Diameter ◽

Specific Time ◽

Gas Velocity ◽

Vibration Intensity ◽

Superficial Gas Velocity ◽

Plate Column

The effects of vibration intensity, superficial gas velocity and content of solid particles on the volumetric oxygen mass transfer coefficient (k 1 a) in a 16.6 cm i.d. multiphase reciprocating plate column were studied. The k 1 a increased with increasing vibration intensity and superficial gas velocity, and decreased with increasing content of solid particles. The k 1 a was correlated with the specific time-averaged power consumtion, the superficial gas velocity, the column diameter and the content of solid particles.

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Oxygen mass transfer intensification in an inner-loop rotor-stator reactor: Production of sodium gluconate as an example

Chemical Engineering and Processing - Process Intensification ◽

10.1016/j.cep.2020.108290 ◽

2021 ◽

Vol 160 ◽

pp. 108290

Author(s):

Xiao-Ting Wang ◽

Zhang-Nan Wen ◽

Yong Luo ◽

Bao-Chang Sun ◽

Yan-Yun Shao ◽

...

Keyword(s):

Mass Transfer ◽

Oxygen Mass Transfer ◽

Sodium Gluconate ◽

Reactor Production ◽

Mass Transfer Intensification

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Oxygen mass transfer coefficient with sparged bubble size analysis in stir tank bioreactors

10.1021/scimeetings.0c07238 ◽

2020 ◽

Author(s):

Yusuke Tomioka ◽

Takao Ito

Keyword(s):

Mass Transfer ◽

Transfer Coefficient ◽

Mass Transfer Coefficient ◽

Bubble Size ◽

Size Analysis ◽

Oxygen Mass Transfer

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Heat and Mass Transfer Intensification in Solid Sorption Systems

Journal of Enhanced Heat Transfer ◽

10.1615/jenhheattransf.v5.i2.40 ◽

1998 ◽

Vol 5 (2) ◽

pp. 111-125 ◽

Cited By ~ 6

Author(s):

L. E. Kanonchik ◽

Leonid L. Vasiliev, Jr. ◽

Valery A. Babenko

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Sorption Systems ◽

Mass Transfer Intensification

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Two-Phase Flow Mass Transfer Analysis of Airlift Pump for Aquaculture Applications

Fluids ◽

10.3390/fluids6060226 ◽

2021 ◽

Vol 6 (6) ◽

pp. 226

Author(s):

Rashal Abed ◽

Mohamed M. Hussein ◽

Wael H. Ahmed ◽

Sherif Abdou

Keyword(s):

Mass Transfer ◽

Oxygen Transfer ◽

Transfer Rate ◽

Two Phase Flow ◽

Oxygen Transfer Rate ◽

Flow Patterns ◽

Oxygen Mass Transfer ◽

Phase Flow ◽

Two Phase ◽

Airlift Pump

Airlift pumps can be used in the aquaculture industry to provide aeration while concurrently moving water utilizing the dynamics of two-phase flow in the pump riser. The oxygen mass transfer that occurs from the injected compressed air to the water in the aquaculture systems can be experimentally investigated to determine the pump aeration capabilities. The objective of this study is to evaluate the effects of various airflow rates as well as the injection methods on the oxygen transfer rate within a dual injector airlift pump system. Experiments were conducted using an airlift pump connected to a vertical pump riser within a recirculating system. Both two-phase flow patterns and the void fraction measurements were used to evaluate the dissolved oxygen mass transfer mechanism through the airlift pump. A dissolved oxygen (DO) sensor was used to determine the DO levels within the airlift pumping system at different operating conditions required by the pump. Flow visualization imaging and particle image velocimetry (PIV) measurements were performed in order to better understand the effects of the two-phase flow patterns on the aeration performance. It was found that the radial injection method reached the saturation point faster at lower airflow rates, whereas the axial method performed better as the airflow rates were increased. The standard oxygen transfer rate (SOTR) and standard aeration efficiency (SAE) were calculated and were found to strongly depend on the injection method as well as the two-phase flow patterns in the pump riser.

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