Study of gas‐to‐liquid mass transfer by dynamic methods in trickle beds

Goenaga, Alberto; Smith, J. M.; McCoy, Benjamin J.

doi:10.1002/aic.690350117

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Midoux et al determined mass transfer parameters by chemical technique using organic liquids. Goenaga et al used dynamic methods to study gas-to-liquid mass transfer in trickle-bed reactors, indicating a strong dependence of mass transfer coefficient on gas flow rate, while Toppinen et al modeled mass transfer using both Stefan−Maxwell equations and the effective diffusivity method, extracting similar results. Iliuta and Thyrion 54 showed that, in the trickle-flow regime, volumetric liquid mass transfer coefficients obtained by physical and chemical absorption are close and axial dispersion is significant at low liquid velocities and high initial concentration of the liquid reactant.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Mass Transfer of Benzene Hydrogenation in a Trickle-Bed Reactor

Metaxas

Papayannakos

2006

Ind. Eng. Chem. Res.

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Liquid-phase catalytic hydrogenation of benzene was studied in a three-phase bench-scale reactor operating in downflow mode at elevated temperatures and pressures. Reaction kinetics and external gas-liquid mass transfer effects for the system used are estimated. A simplified kinetic expression is used to describe intrinsic kinetics. An analytical model for reactor simulation has been employed incorporating vapor-liquid equilibrium, solvent effects, and mass transfer limitations. Gas-and liquid-side mass transfer coefficients are extracted for the range of the gas and liquid feed flow rates employed in this work. A comparison between the mass transfer values estimated in this work and values from correlations and data reported in the literature is presented. Operation in upflow mode is also compared with downflow mode, and the different reactor performance is discussed.

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Section: Introductionmentioning

confidence: 99%

Kinetics and Mass Transfer of Benzene Hydrogenation in a Trickle-Bed Reactor

Metaxas

Papayannakos

2006

Ind. Eng. Chem. Res.

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“…Conceptual Models for Nonaqueous − Aqueous Phase Mass Transfer. The two-resistance theory for mass transfer between two immiscible phases has been successfully used to describe gas−liquid mass transfer in trickle-bed reactors ( , ), volatilization from surface waters ( , ), and contaminant transfer between oil films and water ( , ). For transport across an oil or NAPL interface into the aqueous phase, the flux is where J i is the mass flux of species i into the aqueous phase; is the aqueous-side mass transfer coefficient; is the nonaqueous-side mass transfer coefficient; P i is the nonaqueous−aqueous phase partition coefficient; is the bulk nonaqueous phase concentration of species i ; and is the bulk aqueous phase concentration of species i .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Thermal Effects on the Dissolution of a Nonaqueous Phase Liquid in Porous Media

Imhoff

Frizzell

Miller

1997

Environ. Sci. Technol.

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Porous media contaminated with nonaqueous phase liquids (NAPLs) may serve as a long-term source of groundwater contamination. To remove NAPLs and thereby mitigate the potential impact to the environment and human health, it has been suggested that contaminated media be flushed with cosolvents, surfactants, hot water, or steam. In this study, hot water flooding was used to remediate a porous medium contaminated with tetrachlorethylene (PCE) at residual saturation in an otherwise water-saturated medium. The effect of temperature on the physical and chemical properties of the system was well characterized, and a quantitative assessment was made of the effect of temperature on PCE dissolution. A comparison of the results from the dissolution experiments with existing dimensionless correlations for NAPL dissolution in porous media elucidated the role of the aqueous-phase viscosity and the NAPL species aqueous-phase diffusivity. Nonaqueous-aqueous phase mass transfer rate coefficients measured for this system were put in dimensionless form (Sherwood number) and fitted to a power-law model. The Sherwood number was found to vary with the Schmidt number to approximately the 0.5 power, as suggested by previous investigators. This result is expected to apply to nonaqueousaqueous phase mass transfer in other systems where aqueous-phase properties are altered by the addition of chemicals.

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Study and modelling of catalytic sulfur dioxide oxidation in “verlifix” three phase reactor

Kiared

Zoulalian

1992

Chemical Engineering Science

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Study of gas‐to‐liquid mass transfer by dynamic methods in trickle beds

Cited by 5 publications

References 16 publications

Kinetics and Mass Transfer of Benzene Hydrogenation in a Trickle-Bed Reactor

Kinetics and Mass Transfer of Benzene Hydrogenation in a Trickle-Bed Reactor

Evaluation of Thermal Effects on the Dissolution of a Nonaqueous Phase Liquid in Porous Media

Study and modelling of catalytic sulfur dioxide oxidation in “verlifix” three phase reactor

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