Mathematical Model for Monitoring Gas-Liquid Reactors by Means of Continuous Flow Analysis

Navarro-Laboulais, J.; Capablanca, Lucía; Abad, Alberto; Cardona, Salvador; López, F.; Torregrosa, J. I.

doi:10.1080/01919510500479098

Cited by 6 publications

(1 citation statement)

References 34 publications

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“…For relatively slow reactions, characterized by second-order reaction rate constants lower than 10 2 −10 3 L mol −1 s −1 , the absolute method, using batch or continuous homogeneous reactors, should be applied. 3 Nonetheless, such kinetic studies are complicated by both the low ozone stability, which makes the sampling method particularly sensitive, 4 and low solubility in water. For faster reactions, homogeneous reactors are incompatible owing to the low ozone and/or reactant lifetimes except when using expensive systems such as a stopped-flow spectrophotometer.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

Dang

Biard

Couvert

2016

Ind. Eng. Chem. Res.

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A jacketed stirred-cell reactor, operated semi-continuously, was used to assess the kinetics of fast ozonation reactions by reactive absorption. The method was applied to the direct ozone reaction with resorcinol. A high resorcinol concentration was used to reach a steady state and to neglect the byproducts accumulation. Thus, the mass-transfer rate, and consecutively the reaction rate, were deduced from the ozone mass balance in the gas phase. The gas-phase and liquid-phase mass-transfer coefficients were previously measured directly through the ozone absorption in appropriated conditions. The results emphasized the high sensitivity of the reaction rate constant to the ozone physicochemical properties, especially its solubility, which is controversial in the literature. Therefore, several correlations used to calculate the ozone solubility in water were considered to calculate the second-order reaction rate constant, which varied from 3.57-4.68 10 5 L mol -1 s -1 at 20°C to 9.50-12.2 10 5 L mol -1 s -1 at 35°C. The activation energy was in the range 35-59 kJ mol -1 depending on the considered ozone solubility correlation. A sensitivity analysis is provided to assess the influence of the experimental conditions and ozone physicochemical properties on the model. Finally, the applicability of this method is thoroughly discussed.2

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Section: Introductionmentioning

confidence: 99%