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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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