Accession Number : AD0803267

Title :   CATALYTIC OXIDATION OF METHANE AT LOW SPACE VELOCITIES.

Descriptive Note : Final rept. Jan-Sep 65,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Marshall, Derry W.

Report Date : JUN 1966

Pagination or Media Count : 33

Abstract : The feasibility of removing methane from an airstream by catalytic oxidation at low flows was investigated by passing a one percent, by volume, methane in airstream through an inhouse designed and fabricated stainless steel reactor. The reactor contained either Hopcalite, 5% V2O5 - 5% MoO3 on alumina, or one of the following materials supported on alumina: 0/5% palladium, 0.5% platinum, 0.5% rhodium, and 0.5% ruthenium. Some discontinuity in the data reported in the literature on methane oxidation at or around the transition flow region prompted a closer investigation in this area. In addition, space velocities around 500 fills per hour were used to insure chemical equilibrium and for comparison with the more common value of approximately 15,000 fills per hour used in most industrial applications. Experiments performed using the above catalyst revealed no deleterious effects associated with operating in the transition flow region, but did point out the advantage of using high space velocities for maximum catalyst utilization. The palladium catalyst proved superior to all others tested and catalyzed the reaction to completion at 560 F. Conversion versus temperature curves are plotted for each catalyst flow rate combination and the effect of space velocity on conversion at constant temperature is shown for the Hopcalite and palladium catalysts. Variables which affected the accuracy of experimentation most are discussed and possible improvements suggested. (Author)

Descriptors :   *OXIDATION), (*METHANE, FEASIBILITY STUDIES, ATMOSPHERES, FLUID FILTERS, CONTAMINATION, GASES, REYNOLDS NUMBER, TEST EQUIPMENT, STAINLESS STEEL, CATALYSTS, PALLADIUM, PLATINUM, RHODIUM, HYDROCARBONS, MOLECULAR WEIGHT.

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE