CATALYTIC COMBINATION OF HYDROGEN AND OXYGEN IN THORIA SLURRIES. PART III. Technical Report No. IX

Technical Report · Thu Sep 15 04:00:00 EDT 1960

OSTI ID:4118134

Horton, R M; Megerth, F H; Reese, D A; Wadsworth, M E

Tests were conducted to delineate the degree of effectiveness in maintaining catalytic activity of large and small additions of colloidal silica directly to the slurry mixture made with platinized thoria. The small amounts of silica were the most effective in maintaining catalytic activity although this catalyst also decreased in activity with repeated runs to an unacceptable degree. Tests were made to ascertain whether the addition of silica to the thoria surface before platinizing might improve the catalyst life. A refluxing technique using both sodium silicate and colloidal silica was employed. The results were comparable with those reported earlier for a similar technique using silicic acid. The catalyst life was improved compared to nonsilicated thoria but was still not as long as desired. A series of experiments was run using a palladium sol catalyst. This catalyst had fairly good activity although the results may not be quantitatively compared with those obtained at ORNL since an oxygen pretreatment was not used. The catalytic rate decreased with repeated runs although not as much as previously tested catalysts. This catalyst was much more active if the hydrogen was added to the autoclave before the oxygen than vice versa. It was also observed that when the gases did not react completely, the partial pressure of hydrogon in the unreacted gas was about 130 psi. (auth)

• Research Organization: Utah. Univ., Salt Lake City. Inst. of Metals and Explosives Research
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-15-007323
• OSTI ID: 4118134
• Report Number(s): TID-6797
• Country of Publication: United States
• Language: English

Related Subjects

AUTOCLAVES
CATALYSIS
CHEMISTRY
COLLOIDS
HYDROGEN
ORNL
OXYGEN
PALLADIUM
PLATINUM COMPOUNDS
PRESSURE
PRESSURE VESSELS
SILICON COMPOUNDS
SILICON OXIDES
SLURRIES
SODIUM SILICATES
TESTING
THORIUM OXIDES
USES