SUMMARY OF RUNS D-77 THROUGH D-93. RATE OF OXIDATION OF CHROMIUM(III) IN DILUTE URANYL SULFATE SOLUTION IN THE PRESENCE OF RUTHENIUM

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The rate of oxidation of chromium(III) to chromium(VI), catalyzed by ruthenium, was determined at various temperatures and oxygen concentrations. The rate at 300 deg C was too rapid for measurement by aliquot sampling. In the temperature range of 225 to 275 deg C, oxidation was rapid and the rate increased with oxygen concentration. A linear dependence of initial oxidation rate on the reciprocal of chromium(VI) concentration suggested that a rate-controlling step in the reaction mechanism may be desorption of chromium(VI) from the ruthenium catalyst. The activation energy calculated for the reaction is 19 kcal/mole. (auth)

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14 p.

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Snavely, E.S.; Greeley, R.S. & Buxton, S.R. February 27, 1959.

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The rate of oxidation of chromium(III) to chromium(VI), catalyzed by ruthenium, was determined at various temperatures and oxygen concentrations. The rate at 300 deg C was too rapid for measurement by aliquot sampling. In the temperature range of 225 to 275 deg C, oxidation was rapid and the rate increased with oxygen concentration. A linear dependence of initial oxidation rate on the reciprocal of chromium(VI) concentration suggested that a rate-controlling step in the reaction mechanism may be desorption of chromium(VI) from the ruthenium catalyst. The activation energy calculated for the reaction is 19 kcal/mole. (auth)

Physical Description

14 p.

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • Report No.: CF-59-2-98
  • Grant Number: None
  • DOI: 10.2172/4103919 | External Link
  • Office of Scientific & Technical Information Report Number: 4103919
  • Archival Resource Key: ark:/67531/metadc872159

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Office of Scientific & Technical Information Technical Reports

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  • February 27, 1959

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:46 p.m.

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Snavely, E.S.; Greeley, R.S. & Buxton, S.R. SUMMARY OF RUNS D-77 THROUGH D-93. RATE OF OXIDATION OF CHROMIUM(III) IN DILUTE URANYL SULFATE SOLUTION IN THE PRESENCE OF RUTHENIUM, report, February 27, 1959; Tennessee. (digital.library.unt.edu/ark:/67531/metadc872159/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.