Kinetics of the catalytic oxidation of sulfur dioxide

Davidson, Burton; Thodos, George

doi:10.1002/aic.690100430

Cited by 13 publications

(6 citation statements)

References 11 publications

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“…As is well known, this oxidation is quite sluggish in the absence of a promoter such as V205 (14). Experimental and calculated results, shown in Table I, indicate that the oxidation is about 10% complete.…”

Section: Resultsmentioning

confidence: 62%

Electrochemical Flue Gas Desulfurization: Reactions in a Pyrosulfate‐Based Electrolyte

Scott¹,

Fannon²,

Winnick³

1988

J. Electrochem. Soc.

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A new electrolyte has been found suitable for use in an electrochemical membrane cell for flue gas desulfurization (FGD). The electrolyte is primarily K2SaO7 and K2SO4, with V2Os as oxidation enhancer. This electrolyte has a melting point near 300~ which is compatible with flue gas exiting the economizer of coal-burning power plants. Standard electrochemical tests have revealed high exchange current densities, around 30 mA/cm 2, in the free electrolyte. Sulfur dioxide is found to be removed from simulated flue gas in a multiple-step process, the first of which is electrochemical reduction of pyrosulfate.

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Section: Resultsmentioning

confidence: 62%

Electrochemical Flue Gas Desulfurization: Reactions in a Pyrosulfate‐Based Electrolyte

Scott¹,

Fannon²,

Winnick³

1988

J. Electrochem. Soc.

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“…Correlations Derived for Published Low Conversion Data. Large negative values for the parameter D in Equation 4were also derived on correlating the low conversion data published by Davidson and Thodos (1964) and Mathur and Thodos (1966). The parameters were determined as A = 0.910, B = 3.62, C = 5.69, and D = -215 for the Davidson and Thodos data at 643°F.…”

Section: Low Conversion Correlationsmentioning

confidence: 96%

“…The field of kinetic studies of the catalytic oxidation of sulfur dioxide has been reviewed several times (Boreskov et al, 1967; Davidson and Thodos, 1964; Duecker and West, 1959;Eklund, 1956;Livbjerg and Villadsen, 1972;Weychert and Urbanek, 1969). However, a more detailed appraisal of the attempts by previous investigators to develop temperature dependent kinetic expressions is presented in this paper.…”

Section: Previous Kinetic Studiesmentioning

confidence: 99%

“…The attempts at developing a temperature-dependent relationship based on Hougen-Watson kinetic equations have likewise involved poor correlations at the individual temperatures. In the low conversion studies of Davidson and Thodos (1964), the values determined for the parameters did not minimize the chosen criterion of fit to the data. This resulted in the deviations of the calculated rates of reaction from the experimental rates being a function of the partial pressure of sulfur trioxide, Pgos• Thus it was by chance that the estimated values of the parameters were positive and followed the Arrhenius relationships.…”

Section: Previous Kinetic Studiesmentioning

confidence: 99%

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Temperature-Dependent Kinetic Equation for Catalytic Oxidation of Sulfur Dioxide

Harris¹,

Norman²

1972

Ind. Eng. Chem. Proc. Des. Dev.

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Low-conversion and integral-conversion experiments were performed to investigate the rate of the catalytic oxidation of sulfur dioxide using two commercial vanadium pentoxide catalysts at temperatures from 450-580°C over a wide range of compositions. Temperature-dependent correlations were derived for each catalyst based on a new form of kinetic expression. These correlations fitted the data almost as accurately as the particular correlations derived for each temperature. A temperature-dependent relationship was also derived using the proposed kinetic expression for the poisoned catalyst data published by Ishii (I960).

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“…u ith parameters calculated from Equation 13, and s = -0.7 does not seem to be any general theory for estimating parameters in nonlinear models using the least-squares criterion on the nonlinear model (72), Rubin {16) and others (2, 10) have outlined various useful computational schemes for fitting nonlinear reaction rate equations to data. Some recent methods have been described by Peterson (75), Lapidus and Peterson (77), Shah and Syn (79), and Davidson (5) for nonlinear examination of rate constants.…”

Section: Evaluation Of Parameters In Selected Reaction Modelsmentioning

confidence: 99%