| abstract |
An aluminosilicate zeolite comprises at least about 90% phase pure ITW framework and a silica-to-alumina ratio of less than about 140, preferably between 60 to 140. The zeolite may have a mean crystal size of 0.5 to 5µm, and may have a phase purity of at least 97%. Preferably, the zeolite is free of alkaline metal. A catalyst article may include the zeolite supported or contained in a substrate selected from a wall-flow honeycomb filter and a flow-through honeycomb substrate. |