Reaction of N/sub 2/O/sub 5/ with H/sub 2/O on carbonaceous surfaces
The heterogeneous reaction of N/sub 2/O/sub 5/ with commercially available ground charcoal in the absence of H/sub 2/O revealed a physisorption process (..gamma.. = 3 x 10/sup -3/) together with a redox reaction generating mostly NO. Slow HNO/sub 3/ formation was the result of the interaction of N/sub 2/O/sub 5/ with H/sub 2/O that was still adsorbed after prolonged pumping at 10/sup -4/ Torr. In the presence of H/sub 2/O, the same processes with ..gamma.. = 5 x 10/sup -3/ are observed. The redox reaction dominates in the early stages of the reaction, whereas the hydrolysis gains importance later at the expense of the redox reaction. The rate law for HNO/sub 3/ generation was found to be d(HNO/sub 3/)/dt = k/sub bi/(H/sub 2/O)(N/sub 25/) with k/sub bi/, the effective bimolecular rate constants, for 10 mg of carbon being (1.6 +/- 0.3) x 10/sup -13/ cm/sup 3//s.
- Research Organization:
- SRI International, Menlo Park, CA
- DOE Contract Number:
- AC03-78EV10121
- OSTI ID:
- 5346030
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:19; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ADSORPTION
CATALYTIC EFFECTS
CHALCOGENIDES
CHARCOAL
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REDOX REACTIONS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WATER