Devices and methods for radially-zoned catalyst coating

A method of coating a catalyst support body, the method comprising the steps of:

• providing a catalyst slurry via a coating station that includes a slurry pan, a sealing cover, and a plurality of spring-loaded rods coupling the sealing cover to the slurry pan, comprising:
• receiving the slurry in the slurry pan;
• releasably holding, by the sealing cover, the catalyst support body, wherein the sealing cover comprises an impermeable sealing surface configured to seal;
• a first sealing region against at least one of a face or a circumferential edge of the input end of the catalyst support body to prevent contact between an outer surface of the catalyst support body and the catalyst slurry;
• and
• a second sealing region distinct from the first sealing region;
• and
• introducing the catalyst support body to the sealing cover;
• introducing an open input end of the catalyst support body into the catalyst slurry;
• directing an amount of the catalyst slurry through the input end and into an inner portion of the catalyst support body;
• removing the catalyst support body from the catalyst slurry;
• rotating the catalyst support body relative to the slurry pan;
• and
• directing the catalyst slurry within the catalyst support body towards an open output end of the catalyst support body.