Superior pillared clay catalysts for selective catalytic reduction of nitrogen oxides for power plant emission control

摘要

The present invention provides a catalyst for selective catalytic reduction of nitrogen oxide compounds with ammonia comprising a composition of one or more pillared interlayered clays, one or more metal ions exchanged with the pillared interlayered clays, and one or more promoter ions exchanged with the pillared interlayered clays. Specifically, the pillared interlayered clay (PILC) catalysts of the present invention include Fe^3+, Cr^3+, Mn^2+, Co^2+, Cu^2+, and Ni^2+ exchanged Al₂O₃-PILC, TiO₂-PILC, ZrO₂-PILC or SiO₂-PILC catalysts. The promoters include Ce, La, Pr, Th and Nd. These pillared clay catalysts of the present invention show remarkable activity for the SCR reaction.