A study of catalysts and mechanism in synthesis reactions
It is becoming increasingly evident that surface-generated gas-phase radicals play an important role in the catalytic oxidation of hydrocarbons. The most notable example is the oxidative coupling of methane which is initiated by the formation of CH{sub 3}{center dot}radical at the surfaces of metal oxides. More recently, emphasis has been placed on the secondary reactions that the radicals undergo when they react with a metal oxide surface. These reactions may be important in determining product selectivity, as CH{sub 3}{center dot}radicals will collide with the surface many times before they react with another CH{sub 3}{center dot}radical. If secondary surfaces results in complete oxidation, then the selectivity for the oxidative coupling reaction would be severely diminished. Another current aspect of the work is the emanation of OH{center dot}radicals from platinum and palladium metal surfaces. Hydroxyl radicals are known to be chain carriers during combustion reactions, and the metal surface may serve to introduce these radicals into the gas phase. 10 refs., 3 figs.
- Research Organization:
- Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-88ER13829
- OSTI ID:
- 5053509
- Report Number(s):
- DOE/ER/13829-6; ON: DE92002536
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
ALKYL RADICALS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DOCUMENT TYPES
ELECTRON SPIN RESONANCE
ELEMENTS
EMISSION SPECTROSCOPY
ETHYL RADICALS
FLUORESCENCE SPECTROSCOPY
HYDROXYL RADICALS
KINETICS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC RESONANCE
METALS
METHYL RADICALS
MULTI-PHOTON PROCESSES
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
PROGRESS REPORT
RADICALS
RARE EARTH COMPOUNDS
REACTION KINETICS
RESONANCE
SPECTROSCOPY
STRONTIUM COMPOUNDS
STRONTIUM NITRATES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS