Electron attachment to CO{sub 2} in supercritical ethane
- Kanagawa Inst. of Tech., Astugi (Japan). Faculty of Engineering
- Univ. of Tokyo (Japan). Dept. of Pure and Applied Science
- Brookhaven National Lab., Upton, NY (United States). Chemistry Dept.
Thermal electrons attach reversibly to CO{sub 2} in supercritical ethane. The equilibrium constants range from 40 to 2 {times} 10{sup 4} m{sup {minus}1} for pressures from 50 to 220 bar at 33 and 37 C. The attachment rate increases and the detachment rate decreases as the pressure increases. The lifetime of CO{sub 2}{sup {minus}} is between 20 and 100 ns in the high-pressure range. The reaction volume changes more than an order of magnitude, from {minus}20.0 to {minus}0.5 L/mol over the pressure and temperature ranges studied. The activation volume is approximately 50% of the reaction volume. Electrostriction volumes of the CO{sub 2}{sup {minus}} ion, calculated by a compressible continuum model, account for the main part of the observed reaction volumes. The calculation shows that the high-density region around each CO{sub 2}{sup {minus}} extends to 1 nm.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Ministry of Education, Science and Culture (Japan)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 338398
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Journal Name: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory Journal Issue: 4 Vol. 103; ISSN 1089-5639; ISSN JPCAFH
- Country of Publication:
- United States
- Language:
- English
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