Oxygen transfer in a three-phase bubble column using solid polymers as mass transfer vectors
Por:
Quijano, G., Franco-Morgado, M., Cordova-Aguilar, M. S., Galindo, E., Thalasso, F.
Publicada:
1 ene 2020
Categoría:
Chemical engineering (miscellaneous)
Resumen:
Three solid polymers; Kraton, Elvax, and Desmopan, previously suggested
to be used in three-phase reactors, were evaluated for their ability to
enhance oxygen transfer in a bubble column. These vectors were first
characterized, including; particle size distribution, specific surface
area, density, void fraction and thermal stability. Oxygen transfer was
then determined with a noncoalescing medium using polymer volume
fractions from 0 to 75% in a 4 L bubble column operated at air flow
rates ranging from 1 to 6 L/min. The results showed that in most of the
cases, particles clusters were formed at the surface of the bulk water
phase, which caused a decrease of the oxygen transfer capacity. Kraton,
was the polymer vector more easily dispersible in the air/water bulk
phase of the bubble column, and used at a proportion of 10% with an
aeration flowrate of 2 L/min, it allowed an oxygen transfer enhancement
by 90-100%, compared to a control with no vector. This enhancement was
a result of constant collisions between vector particles and bubbles,
decreasing their rising speed, while not altering their mean size, thus
resulting in a significantly higher gas holdup and air/water exchange
area.
Filiaciones:
Quijano, G.:
IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ctr Invest & Estudios Avanzados, Av IPN 2508, Mexico City 07360, DF, Mexico
Univ Nacl Autonoma Mexico, Lab Res Adv Proc Water Treatment, Inst Ingn, Unidad Acad Juriquilla, Blvd Juriquilla 3001, Queretaro 76230, Mexico
Franco-Morgado, M.:
IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ctr Invest & Estudios Avanzados, Av IPN 2508, Mexico City 07360, DF, Mexico
Cordova-Aguilar, M. S.:
Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol ICAT, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, Mexico
Galindo, E.:
Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, Mexico
Thalasso, F.:
(Corresponding Author), IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ctr Invest & Estudios Avanzados, Av IPN 2508, Mexico City 07360, DF, Mexico
IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ctr Invest & Estudios Avanzados, Av IPN 2508, Mexico City 07360, DF, Mexico
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