Reference

Ruthenium oxide deposition and scouring in a rotary kiln voloxidizer

Ruthenium oxide deposition and scouring in a rotary kiln voloxidizer. Klein, J. A. (Oak Ridge Natl. Lab., Oak Ridge, Tenn., USA). Report, ORNL/TM-5665, 18 pp. Avail. AT From: ERDA Energy Res. Abstr. 1977, 2(12), Abstr. No. 28926 (English) 1977. DOCUMENT TYPE: Report CA Section: 71 (Nuclear Technology) An exptl. procedure was developed to produce reproducible dense coatings of RuO2 [12036-10-1] on a variety of substrates. Tracer expts. were performed to monitor the scouring of RuO2 coatings under conditions simulating those expected to be encountered in the voloxidation step during LMFBR fuel reprocessing. RuO2 may build up under repeated deposition and scouring cycles and might possibly present a problem in an actual LMFBR fuel voloxidizer.

A Moessbauer study of automotive emission control catalysts

A Moessbauer study of automotive emission control catalysts. Clausen, Chris A., III; Good, Mary L. (Dep. Chem., Florida Technol. Univ., Orlando, Fla., USA). J. Catal., 46(1), 58-64 (English) 1977. CODEN: JCTLA5. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 51, 67, 73 Moessbauer spectroscopy of BaO-stabilized Ru catalysts for redn. of NOx in exhaust gases shows the catalysts to contain a mixt. of RuO2 [12036-10-1] and BaRuO3 [12009-17-5]. All Ru is reduced to the metal in a reducing atm. at high temps. The catalysts are destabilized as the oxidn.-redn. cycle is repeated, as indicated by the decreasing BaRuO3-RuO2 ratio. The destabilization is caused by phys. sepn. of Ru metal (metal atom clustering) from the stabilizing BaO phase.