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CO2 absorption in nanofluids in a randomly packed column equipped with magnetic field

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Abstract

Magnetic nanofluids have been used for absorption of CO2 in a packed column in the presence of magnetic field. Adding nanoparticles into the solvent enhances mass transfer characteristics. The optimum concentrations of Fe3O4/water and NiO/water nanofluids are 0.005, and 0.01 % respectively, and the maximum enhancement of mass transfer rate in comparison with pure water is 12 and 9.5 % respectively. The magnetic field showed positive effect on the CO2 absorption performance.

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Abbreviations

a:

Specific surface area of packing (m2 m−3)

C:

Constant in Eq. 4

C:

Concentration (mol l−1)

d:

Diameter (m)

D:

Diffusion coefficient (m2 s−1)

Fr:

Froude number

g:

Gravitational acceleration (ms−2)

hl :

Column holdup (m3 m−3)

Kla:

Mass transfer coefficient (s−1)

NA :

Flux of mass transfer (mol m−3 s−1)

Q:

Fluid flow rate (l s−1)

Re:

Reynolds number

S:

Tower cross section (m2)

\( \overline{U} \) :

Mean effective velocity (ms−1)

U:

Velocity (ms−1)

We:

Weber number

Z:

Height of the tower (m)

µ:

Viscosity (kg s−1)

ρ:

Density (kg m−3)

*:

Saturation

ave:

Average

bs:

Base fluid

eff:

Effective

i:

Inlet

l:

Liquid

mf:

Magnetic field

nf:

Nanofluid

o:

Outlet

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Authors and Affiliations

  1. Department of Chemical Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran

    J. Salimi, M. Haghshenasfard & S. Gh. Etemad

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  1. J. Salimi
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  2. M. Haghshenasfard
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  3. S. Gh. Etemad
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Correspondence to M. Haghshenasfard.

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Salimi, J., Haghshenasfard, M. & Etemad, S.G. CO2 absorption in nanofluids in a randomly packed column equipped with magnetic field. Heat Mass Transfer 51, 621–629 (2015). https://doi.org/10.1007/s00231-014-1439-5

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  • DOI: https://doi.org/10.1007/s00231-014-1439-5

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