Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1988-05-11
1989-08-22
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
208140, 208165, 208173, 502 35, 502 47, 502 48, B01J 3844, B01J 3824, B01J 2396, C10G 3512
Patent
active
048596434
ABSTRACT:
A method for regenerating coke-contaminated catalyst particles achieves better utilization of oxygen and minimizes surface area loss of the catalyst by confining particles in the combustion section of a regeneration zone to a tapered bed configuration. In this method, catalyst particles move through the regeneration zone in continuous or semi-continuous flow and are formed into a vertically elongated bed of particles in the regeneration zone. An oxygen-containing gas is passed through the particle bed in a transverse direction and initiates combustion of the coke deposits along a burn front that extends diagonally through the catalyst bed from the inlet surface of the bed to the outlet surface of the bed. The catalyst bed is tapered to reduce the volume of catalyst particles behind the burn wave, with respect to gas flow through the bed, thereby increasing the gas flow through the upper portion of the bed and removing catalyst that would be exposed to high temperature flue gas flowing across the bed from the burn front. The method of this invention can confine catalyst particles to a bed having a continuous taper or the thickness of the bed may be varied by confining the catalyst in discrete bed portions that increase progressively down the length of the bed. This method of regeneration can also include steps for halogenation and drying of the catalyst particles. A particularly useful application of this invention is in reforming processes.
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Koves William J.
Sechrist Paul A.
Konopka Paul E.
McBride Thomas K.
Tolomei John G.
UOP
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