Behavior of excess electrons in supercritical fluids -- Electron attachment
- Kanagawa Inst. of Tech., Atsugi (Japan). Faculty of Engineering
- Brookhaven National Lab., Upton, NY (US)
- Univ. of Tokyo (Japan). Dept. of Pure and Applied Sciences
The behavior of excess electrons in supercritical ethane was investigated by measuring mobility and reaction rates. Mobilities wee measured by means of a time-of-flight method at 306--320 K 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.
- Research Organization:
- Brookhaven National Lab., Upton, NY (US)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (US); Ministry of Education, Science and Culture (Japan) (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 354895
- Report Number(s):
- BNL--66560; ON: DE99003506; BR: KC030101
- Country of Publication:
- United States
- Language:
- English
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