Manganese-cerium mixed oxides supported on rice husk based activated carbon with high sulfur tolerance for low-temperature selective catalytic reduction of nitrogen oxides with ammonia.

ABSTRACT: A rice husk-derived activated carbon supported manganese-cerium mixed oxide catalyst (Mn-Ce/RAC) was prepared by an impregnation method and tested for the selective catalytic reduction of nitrogen oxides with ammonia (NH₃-SCR). 5 wt% Mn-Ce/RAC catalyst showed the highest activity, yielding nearly 100% NO _x conversion and N₂ selectivity at 240 °C at a space velocity of 30 000 h^-1. Compared with commercial activated carbon supported manganese-cerium mixed oxide catalyst (Mn-Ce/SAC), a higher SCR performance with good SO₂ tolerance could be observed in the tested temperature range over the Mn-Ce/RAC catalyst. The characterization results revealed that the Mn-Ce/RAC catalyst had a higher Mn⁴⁺/Mn³⁺ ratio, amount

SUBMITTER: Shu Y 

PROVIDER: S-EPMC9069626 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature