THE INFLUENCE OF WATER AND SULPHUR DIOXIDE ON CATALYTIC PERFORMANCE OF CARBON COVERED MONTMORELLONITES IN NO ABATEMENT

摘要

Selective catalytic reduction with ammonia (SCR) is the only method used on industrial scale for the removal of nitric oxide from stack gases. Manganese oxides/hydroxides supported on active carbons or carbon modified montmorillonites were shown to be good catalysts at low temperature region (<473 K) in contrast to silica-alumina based materials which exhibit high activity at T > 573 K (1-3). The subject of this work was to study the influence of sulphur dioxide and/or water vapour on SCR catalytic behaviour for the Mn promoted carbon-modified montmorillonite.