Low-temperature Catalytic Reduction of Nitrogen Monoxide with Carbon Monoxide on Copper Iron and Copper Cobalt Composite Oxides

Abstract

Copper iron composite oxides (CuO/Fe 2 O 3) and copper cobalt composite oxides (CuO/Co 3 O 4) for the catalytic reduction of NO with CO at low temperature were prepared by co-precipitation. The catalytic activity and thermal stability of the catalysts were evaluated by a microreactor-GC system. The 100% conversion temperatures of NO are 80 • C for CuO/Fe 2 O 3 and 90 • C for CuO/Co 3 O 4. The catalysts possess high catalytic activity and favorable thermal stability for NO reduction with CO in a wide temperature range and long time range. A systematic study of the molar ratios of the reactants, the volume of NaOH, aging time, and calcination temperature/time was carried out to investigate the influence preparation conditions on the catalytic activity of the catalysts.

Low-temperature nitric oxide reduction over silver-substituted cobalt oxide spinels

“…The literature cites very few reports on low-temperature NO-CO reactions which have been achieved using Cu-and Aubased catalysts. [3][4][5][6] Cobalt spinel compounds have been proven to be efficient in CO oxidation at low temperatures. 7,8 Co 3 O 4 has a promising role in low-temperature CO oxidation due to its high surface oxygen mobility.…”