Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1987-07-09
1989-06-27
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
208164, 422144, 422145, 422147, 502 43, B01J 2938, B01J 2120, C10G 1118, F27B 120
Patent
active
048430510
ABSTRACT:
An FCC catalyst regeneration technique in which the catalyst is regenerated in a dense bed regenerator. Regeneration effluent gases are collected from different parts of the regenerator vessel in a common collection zone and passed through the catalyst separation cyclones from the common collection zone. The cyclones may be arranged with their inlet horns adajcent one another in the common collection zone or a cyclone inlet manifold with a common inlet may be connected to the cyclone inlets. The inlet port to the manifold may be extended to form an elongated vertical duct through which regeneration effluent gases and entrained catalyst pass from the dilute phase of the dense bed to the cyclone so that mixing of the effluent gases is promoted to ensure combustion in residual quantities of oxygen present in the effluent gases before the gases enter the cyclones. Improved operating flexibility is obtained together with a reduced likelihood of cyclone damage as a result of localized high temperature excursions. In addition, the NO.sub.x level of the regenerator stack gases is reduced.
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"Abatement of NOx from Coal Combustion, Chemical Background and Present State of Technical Development", Ind. Eng. Chem. Process Des. Dev. 24(1), 1985.
Kovacs Richard C.
Krambeck Frederick J.
Sarli Michael S.
Keen Malcolm D.
Konopka Paul E.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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