Reducing nox emissions with group iiib compounds

Details Reducing nox emissions with group iiib compounds Reducing nox emissions with group iiib compounds

C - Chemistry, Metallurgy

10

G

196/107, 196/155

C10G 11/00 (2006.01) B01J 38/16 (2006.01) C10G 11/05 (2006.01)

Patent

CA 2032833

F-5634 REDUCING NO EMISSION WITH GROUP IIIB COMPOUNDS ABSTRACT A process for regeneration of cracking catalyst while minimizing NOx emissions is disclosed. A Group IIIB based deNOx additive is present in an amount and in a form which reduces NOx emissions. Relatively small amounts of lanthanum or yttrium oxides,or lanthanum titanate, preferably impregnated on a separate support are effective to reduce NOx produced in the regenerator. The additive converts NOx to nitrogen even when Pt CO combustion promoter and some excess oxygen are present in the regenerator.

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