Effects of pressure on liquid-phase mass transfer coefficients

Teramoto, Masaaki; Tai, Shinichi; Nishii, Koji; Teranishi, Hiroshi

doi:10.1016/0300-9467(74)85027-6

Cited by 61 publications

(34 citation statements)

References 3 publications

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“…Liquid phase mass transfer coefficient kL was determined with oxygen-carbon tetrachloride system by the method of Teramoto et al 7) and is shown in VOL 10 NO. 3 1977 In the experiment on ozone-initiated autoxidation of benzaldehyde, a condenser and an additional capillary flow meter were attached to the outlet of the reaction vessel.…”

Section: Methodsmentioning

confidence: 99%

Kinetics of ozonation of aldehydes in relation to their ozone-initiated autoxidation.

Teramoto

Ito

Teranishi

1977

J. Chem. Eng. Japan

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The rates of ozonation of aliphatic aldehydes and monosubstituted benzaldehydes are measured in carbon tetrachloride solutions, and the reaction order and the rate constants are determined on the basis of the theory of gas absorption accompanied by chemical reactions. It is found that the reaction is first order with respect to both ozone and benzaldehyde, and also that the second order rate constants for n-and wo-butyraldehydes are muchhigher than those for the substituted benzaldehydes studied. The order of reactivity of substituted benzaldehydes is anisaldehyde > /j-tolualdehyde > benzaldehyde > p-and m-chlorobenzaldehydes > p-and /w-nitrobenzaldehydes. It is also found that the rate of ozonation of substituted benzaldehyde follows Hammett's rule.Furthermore, the kinetics of liquid-phase autoxidation of benzaldehyde with ozone-oxygen mixture is studied, and the observed oxidation rates are found to be approximately consistent with those predicted on the assumption that the reaction of ozone with aldehyde is an initiation reaction of the autoxidation.

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Section: Methodsmentioning

confidence: 99%

Kinetics of ozonation of aldehydes in relation to their ozone-initiated autoxidation.

Teramoto

Ito

Teranishi

1977

J. Chem. Eng. Japan

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“…Only a few publications on the influence of elevated pressures on gas-liquid mass transfer are known (Shridhar and Potter, 1980;Teramoto et al, 1974;Vafopoulos et al, 1975;Yoshida and Arakawa, 1968). However, generally it was not possible to predict the gas-phase controlled mass-transfer rates with the resultant data because the experiments were limited to measurement of k,S or k, in stirred vessels and, moreover, some of the results were contradictory.…”

Section: Introductionmentioning

confidence: 99%

The effect of diffusivity on gas-liquid mass transfer in stirred vessels. Experiments at atmospheric and elevated pressures

Versteeg

Blauwhoff

Swaaij

1987

Chemical Engineering Science

122

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Abstract-Mass transfer has been studied in gas-liquid stirred vessels with horizontal interfaces which appeared to the eye to be completely smooth. Special attention has been paid to the influence of the coefficient of molecular diffusion. The results are compared with those published before. The simplifying assumptions of identical hydrodynamical conditions at the same stirrer speed in one particular geometry, which have been made in some previous investigations, is shown to be wrong and may-lead to incorrect conclusions on the influence of the diffusion coefficient. For the gas phase the mass transfer can be described by the penetration theory (Higbie, R.

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“…They found k L a to be independent of pressure for the whole range of pressure examined (1.38-9.65MPa). Teramoto et al [75] also found kua to be independent of pressure for several gases absorbing into water at 298 K between 0.2 to lOMPa (2-100 aim). Although oxygen was not included in their study, they postulated that "it is unlikely that the absorption of oxygen shows substantially different behaviour".…”

Section: The Effect Of Oxygen Pressurementioning

confidence: 92%

Gas–Liquid Oxygen Mass-transfer; from Fundamentals to Applications in Hydrometallurgical Systems

Filippou

Cheng

Demopoulos

2000

Mineral Processing and Extractive Metallurgy Review

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Oxygen gas is used as a reactant in many hydrometallurgical processes. However, oxygen is sparingly soluble in aqueous electrolyte solutions, and the driving force for its masstransfer from the gas to the aqueous phase is also very low. Hence, the mass-transfer of oxygen depends significantly on the interfacial area between the gas and the liquid phase, which in turn depends on the mixing conditions inside the reactor. A change in the solution composition or the presence of solids can further alter the rate of oxygen masstransfer. All such phenomena related to the gas-liquid oxygen mass-transfer in hydrometallurgical unit operations are critically reviewed in the present article -from the basic thermodynamics and kinetics of oxygen dissolution in aqueous solutions to the most recent advances in oxygen mass-transfer systems.

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Effects of pressure on liquid-phase mass transfer coefficients

Cited by 61 publications

References 3 publications

Kinetics of ozonation of aldehydes in relation to their ozone-initiated autoxidation.

Kinetics of ozonation of aldehydes in relation to their ozone-initiated autoxidation.

The effect of diffusivity on gas-liquid mass transfer in stirred vessels. Experiments at atmospheric and elevated pressures

Gas–Liquid Oxygen Mass-transfer; from Fundamentals to Applications in Hydrometallurgical Systems

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