BEHAVIOR OF EXCESS ELECTRONS IN SUPERCRITICAL FLUIDS - ELECTRON ATTACHMENT

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The behavior of excess electrons in supercritical ethane was investigated by measuring mobility and reaction rates. Mobilities were measured by means of a time-of-flight method at 306--320K as a function of pressure. Mobility values decreased at all temperatures with increasing pressure, but showed a small minimum or a shoulder at the pressure where the compressibility {chi}{sub T} has a peak. Electron attachment to CO{sub 2}, NO, pyrimidine and C{sub 2}F{sub 4} over the same temperature range was studied as a function of pressure. Both attachment rate constants k{sub a} for NO and C{sub 2}F{sub 4}, and equilibrium constants K({double_bond}k{sub a}/k{sub ... continued below

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4 pages

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NISHIKAWA,M.; HOLROYD,R.A. & ITOH,K. July 1, 1999.

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The behavior of excess electrons in supercritical ethane was investigated by measuring mobility and reaction rates. Mobilities were measured by means of a time-of-flight method at 306--320K as a function of pressure. Mobility values decreased at all temperatures with increasing pressure, but showed a small minimum or a shoulder at the pressure where the compressibility {chi}{sub T} has a peak. Electron attachment to CO{sub 2}, NO, pyrimidine and C{sub 2}F{sub 4} over the same temperature range was studied as a function of pressure. Both attachment rate constants k{sub a} for NO and C{sub 2}F{sub 4}, and equilibrium constants K({double_bond}k{sub a}/k{sub d}) for CO{sub 2} and pyrimidine increased sharply at pressures of {chi}{sub T} peaks. Activation volumes V{sub a}* and reaction volumes {Delta}V{sub r} are very large and negative in the critical region. The volume change is mainly due to electrostriction around ions formed. The results are compared to volume changes predicted by, a compressible continuum model.

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4 pages

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OSTI as DE00759001

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  • PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS, NARA (JP), 07/01/1999

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  • Report No.: BNL--66560
  • Report No.: KC030101
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 759001
  • Archival Resource Key: ark:/67531/metadc704941

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  • July 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 9, 2015, 5:02 p.m.

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NISHIKAWA,M.; HOLROYD,R.A. & ITOH,K. BEHAVIOR OF EXCESS ELECTRONS IN SUPERCRITICAL FLUIDS - ELECTRON ATTACHMENT, article, July 1, 1999; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc704941/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.