Zeolite synthesis with alkaline earth metal
Provided are a novel form of AFX zeolite, a novel synthesis technique for producing pure phase small pore zeolites, a novel synthesis method for producing a zeolite with an increased Al pair content, a catalyst comprising the AFX zeolite in combination with a metal, and methods of using the same.
1. An aluminosilicate zeolite comprising at least about 90% phase pure AFX framework, wherein the aluminosilicate zeolite has a short hexagonal prism morphology.
2. The aluminosilicate zeolite of claim 1 , wherein the aluminosilicate zeolite is free or substantially free of alkaline metal.
3. A catalyst for treating an exhaust gas comprising a pure phase AFX zeolite that comprises an extra-framework metal selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Ru, Rh, Pd, Ag, W, Re, Os, Ir, Pt, and Au, wherein the zeolite has a short hexagonal prism morphology.
4. A catalyst article comprising a catalyst according to claim 3 supported on or incorporated into a substrate selected from a wall-flow honeycomb filter and a flow-through honeycomb substrate.
5. A method for storing NO x comprising contacting an exhaust gas stream containing NO x with a catalyst of claim 3 .
6. A method for selectively reducing NO x comprising contacting an exhaust gas stream containing NOx with a catalyst of claim 3 .
7. A method for oxidizing a component of an exhaust gas comprising contacting an exhaust gas stream containing the component with a catalyst of claim 3 , wherein the component is selected from CO, hydrocarbon, and NH 3 .
8. The aluminosilicate zeolite of claim 3 , wherein the aluminosilicate zeolite is free or substantially free of alkaline metal.