| abstract |
Iron-containing aluminosilicate zeolites are disclosed having both framework iron and iron cations on ion exchange sites. Also disclosed is a direct synthetic method for the preparation of iron-containing aluminosilicate zeolites, which does not require the use of intermediate steps such as ion exchange or impregnation. In addition, methods are disclosed for using the iron-containing aluminosilicate zeolites disclosed herein to reduce or remove oxides of nitrogen from exhaust emissions in a selective catalytic reduction reaction, typically in the presence of ammonia. |