High-Performance Low-Vanadium V2O5/Al2O3 Catalysts for Selective Reduction of NOx: I. Catalytic Properties

The study investigates the potential for promoting V 2 O 5 /Al 2 O 3 catalysts for selective catalytic reduction of nitrogen oxides with ammonia (NH 3 -SCR). It was found that the activity of low-V 2 O 5 (2–4 wt %) catalysts can be markedly enhanced (by a factor of 3–4) by their promotion with tungsten oxide. It was shown that a promoted V–W/Al 2 O 3 catalyst that contains 4 wt % of V 2 O 5 can achieve a NO x decomposition efficiency of 90% or even higher in the range of 360–500°C at a GHSV above 100,000 h –1 .