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US 2018/0021764 A1Published application
Stabilized metal-exchanged sapo material
AssigneeBASF SE
InventorsSubramanian Prasad, Martin C. Wende, Jaya L. Mohanan
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Abstract
Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Claims12
1-16. (canceled)
A process for stabilizing a selective catalytic reduction catalyst material comprising a SAPO material and an exchanged metal, the process comprising:
- exposing the SAPO material to dry ammonia;
- and
- ion exchanging the SAPO material with a metal salt to provide a stabilized SAPO material.
Dependencies are inferred from the claim text.