Mobil Oil Corporation

The M.w. Kellogg Company

Allen R Hansen

Phillip Kent Niccum

Maury I Schlossman

Steven C Heidenreich

Suisheng M Dou

William J Hillier

Mohsen N Harandi

Paul H Schipper

Scott A Stevenson

David L Johnson

Oxides of nitrogen (NO.sub.x) emissions from FCC regenerators in complete CO combustion mode are reduced by degrading regenerator performance to increase the coke on regenerated catalyst. High zeolite content cracking catalyst, regenerated to contain more coke, gives efficient conversion of feed and reduces NO.sub.x emissions from the regenerator. Operating with less catalyst, e.g., 30-60% of the normal amount of catalyst in the bubbling dense bed, can eliminate most NO.sub.x emissions while increasing slightly plant capacity and reducing catalyst deactivation.

Conversion of NO.sub.x in FCC bubbling bed regenerator

A nozzle, and FCC process using the nozzle for atomizing heavy feed to a riser reactor, are disclosed. A liquid feed stream is atomized by radial out-to-in impingement of atomizing vapor, discharged onto an impingement plug in an annular expansion region, then sprayed through an outlet. Baffles at the expansion region outlet, and an orifice outlet improve feed atomization and feed/FCC catalyst contact in a riser reactor. The nozzle may be used to distribute liquid over other reactor beds, or to add liquid to distillation columns.

Heavy hydrocarbon feed atomization

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Glassboro, NJ, United States of America

Allen R Hansen