George L. Bauerle

Mixed oxide catalysts for pollution control

Abstract The following mixed oxide catalysts have been investigated for auto exhaust control: LaRhO 3 , SrRuO 3 , SrY 0.5 Ru 0.5 O 2.75 , LaNi 0.5 Ru 0.5 O 3 and NiOCr 2 O 3 spinel. For auto exhausts, LaRhO 3 had equivalent oxidation activity as platinum; SrRuO 3 and SrY 0.5 Ru 0.5 O 2.75 were superior for NO reduction and low NH 3 formation.

Nitric oxide reduction with hydrogen on copper--nickel and chromium--nickel catalysts

The reduction of NO with H/sub 2/ on copper-nickel and chromium-nickel catalysts has been investigated. Both CuNi and CrNi catalysts were prepared by impregnation on Al/sub 2/O/sub 3/ pellets. Dry-pressed catalysts, CrNi with Al/sub 2/O/sub 3/ powder, were formed with several catalysts containing the NiCr/sub 2/O/sub 4/ spinel. A pressed nickel oxide catalyst was highly active for the reduction of NO while impregnated nickel oxide was much less active. Copper oxide and chromium oxide were relatively inactive. Addition of small amounts of copper to impregnated nickel oxide improved the activity of the latter catalyst, but above about 24 atomic percent copper, activity decreased with increase in copper content. The activity of the pressed chromium-nickel catalysts increased with increase in nickel content. Production of NH/sub 3/ maximized at intermediate Ni content for the impregnated CuNi catalysts, and, in general, decreased with increase in Ni content for the impregnated CrNi catalysts and increased with Ni content for the pressed CrNi catalysts.

Reduction of nitric oxide on iron-based catalysts containing vanadium

Abstract The catalytic reduction of NOx with NH3 on alumina supported Fe-Cr-V (18/1/1 atomic ratios) oxides and Fe-V (1/1 atomic ratio) oxides in simulated flue gas has been investigated. Preliminary experimental results indicate that both show exceptional promise as sulfur-resistant and active catalysts for the control of NOx in power plant exhaust emissions.

Nitric oxide reduction with NH3 on Pt in the presence of oxygen

Abstract The catalytic reduction of NO with NH 3 on platinum in simulated flue gas has been investigated. The experimental results indicate that nitrous oxide is a major reaction product which is formed by the reduction of both NO and O 2 with NH 3 .