Use of a platinum porous fiber glass supported catalyst in an automobile exhaust gas system. [Thesis]
The usefulness of a platinum impregnated porous fiber glass catalyst in a synthetic automobile exhaust gas system was investigated. Experimental data for conversions of carbon monoxide, ethylene, and propane were obtained at various preheat temperatures and space velocities. The preheat temperature was varied from approximately 180 to 560/sup 0/C, and the gas hourly space velocity was varied from 20,000 to 70,000 hour/sup -1/. The feed gas contained the major components of an actual engine exhaust. Preliminary results using platinized fiber glass catalysts showed that the catalyst bed had to be evenly and tightly packed in order to give a uniform flow distribution. Using three different pore size distributions of fiber glass catalyst, it was determined that the fiber glass catalyst with the largest average pore size (32 A compared to 12 and 11 A) and the most uniform distribution of pores (a similar volume percent throughout a pore radius range of 7 to 200 A) gave the highest conversions of all reactants at all operating conditions investigated. The results obtained with a platinized fiber glass catalyst were compared with those obtained with two conventional catalysts, platinized alumina beads and platinized silica gel beads under similar conditions. It was shown that under steady state conditions the fiber glass catalyst gave higher conversions of reactants than the conventional beads at low preheat temperatures. Under transient conditions, the fiber glass catalyst reached bed temperatures to initiate the reaction of carbon monoxide, ethylene, and propane with oxygen at a much faster rate than the ones obtained by the bead catalysts.
- OSTI ID:
- 7345809
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fischer-Tropsch synthesis in supercritical fluids. Final report
Production of olefins by oxidative dehydrogenation of propane and butane over monoliths at short contact times
Related Subjects
330702* -- Emission Control-- Carbon Monoxide
330703 -- Emission Control-- Sulfur Dioxide
ALKANES
ALKENES
AUTOMOBILES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC CONVERTERS
CHALCOGENIDES
ELEMENTS
EQUIPMENT
ETHYLENE
FABRICATION
HYDROCARBONS
MATERIALS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
POLLUTION CONTROL EQUIPMENT
PROPANE
TEMPERATURE DEPENDENCE
TESTING
TRANSITION ELEMENTS
VEHICLES
VELOCITY