Reducing NO.sub.x emissions with zinc catalyst

Details Reducing NO.sub.x emissions with zinc catalyst Reducing NO.sub.x emissions with zinc catalyst

1989-12-28

1991-03-26

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208149, 423239, 502 42, C10G 1118

Patent

active

050026542

ABSTRACT:
A process for regeneration of cracking catalyst while minimizing NO.sub.x emissions is disclosed. A zinc-based DeNO.sub.x catalyst is present in an amount and in a form which reduces NO.sub.x emissions. Relatively small amounts of zinc oxides impregnated on a separate support having little or no cracking activity are preferred. The zinc NO.sub.x reduction catalyst can be a separate particle additive, or can be made in situ by adding a solution or dispersion of zinc or a compound thereof to the cracking unit, or to the hydrocarbon feed to the cracking unit.

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