Pulse radiolysis studies in supercritical CO{sub 2}

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The pulse radiolysis technique has been applied to study reactions of ions in supercritical solutions. Evidence for the formation of C{sub 2}O{sub 4}{sup +} has been found in supercritical CO{sub 2}. The rate of the electron transfer reaction from dimethyl aniline to the C{sub 2}O{sub 4}{sup +} was measured over the density range of 0.17--0.7 g/cm{sup 3}. The reaction rate was measured to be close to diffusion-controlled at the lowest density; at higher densities, the rate was considerably below the apparent diffusion-controlled rate. Similar behavior was found for the reaction of the anion (presumably C{sub 2}O{sub 4}{sup {minus}}) with benzoquinone. ... continued below

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10 p.

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Jonah, C. D.; Dimitrijevic, N. M.; Bartels, D. M. & Takahashi, K. March 9, 2000.

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  • Argonne National Laboratory
    Publisher Info: Argonne National Laboratory, Argonne, IL (United States)
    Place of Publication: Argonne, Illinois

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Description

The pulse radiolysis technique has been applied to study reactions of ions in supercritical solutions. Evidence for the formation of C{sub 2}O{sub 4}{sup +} has been found in supercritical CO{sub 2}. The rate of the electron transfer reaction from dimethyl aniline to the C{sub 2}O{sub 4}{sup +} was measured over the density range of 0.17--0.7 g/cm{sup 3}. The reaction rate was measured to be close to diffusion-controlled at the lowest density; at higher densities, the rate was considerably below the apparent diffusion-controlled rate. Similar behavior was found for the reaction of the anion (presumably C{sub 2}O{sub 4}{sup {minus}}) with benzoquinone. The reaction of O{sub 2} with C{sub 2}O{sub 4}{sup +} was considerably slower than the expected diffusion-controlled rate.

Physical Description

10 p.

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OSTI as DE00752866

Medium: P; Size: 10 pages

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  • 5th International Symposium on Supercritical Fluids, Atlanta, GA (US), 04/08/2000--04/12/2000

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  • Report No.: ANL/CHM/CP-100092
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 752866
  • Archival Resource Key: ark:/67531/metadc708690

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  • March 9, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 6, 2017, 6:53 p.m.

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Jonah, C. D.; Dimitrijevic, N. M.; Bartels, D. M. & Takahashi, K. Pulse radiolysis studies in supercritical CO{sub 2}, article, March 9, 2000; Argonne, Illinois. (digital.library.unt.edu/ark:/67531/metadc708690/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.