THE SURFACE CHEMISTRY OF THORIA. Progress Report for February 1, 1959 to January 31, 1960

Technical Report · Fri Jan 01 04:00:00 EST 1960

OSTI ID:4195069

Bradford, H R; Cho, C S; Hausenfleck, C H; Horton, R M; Megerth, F; Reese, D A; Schalow, R A; Tensmeyer, L G; Wadsworth, M E

The use of chloroplatinic acid to platinize the thoria surface produced a much more active catalyst than did the metal. The addition of colloidal silica in excess of 0.42 g per g thoria produced an apparently stable catalyst as did thoria with a platinum surface coverage of 0.34 g (no silica present). The effects of slurrying, refiring, and oxygen hydrogen pretreatment are reported. The surface adsorption and reactivity of the oxides of Cr and Mo and Na/sub 2/SO/ sub 4/ with thoria under hydrothermal conditions are reported. Chromium oxide shows no reactivity up to 48 hrs and 290 deg C. Molybdenura oxide shows no reaction up tc 24 hrs, while between 24 and 48 hrs at 290 deg C extremely slow reaction takes place. Sunface adsorption of sulfates takes place up tc 290 deg C. Infrared studies indicate the adsorbed species on the surface as the bisulfate ion. The preparation of thoria for infrared studies on the surface adsorption of hydroxyl groups is described. The kinetics of silica transfer from colloidal silica to the thoria surface are discussed. (For preceding period see AECU- 4345.) (C.J.G.)

• Research Organization: Utah. Univ., Salt Lake City. Inst. of Metals and Explosives Research
• NSA Number: NSA-14-006190
• OSTI ID: 4195069
• Report Number(s): AECU-4612
• Country of Publication: United States
• Language: English

Related Subjects

ACIDS
ADSORPTION
CATALYSIS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM OXIDES
COLLOIDS
INFRARED RADIATION
MOLYBDENUM OXIDES
PLATINUM CHLORIDES
PLATINUM COMPOUNDS
SILICON OXIDES
SODIUM SULFATES
SPECTRA
SURFACES
THORIUM OXIDES