Hydrocarbon reforming catalyst regeneration process

摘要

A process for regenerating, and reactivating, coked noble metal hydrocarbon reforming catalysts, especially platinum-containing polymetallic catalysts in a system which includes separate, interconnected primary and secondary regeneration gas circuits in which gas is circulated from one circuit to the other, employing (1) a primary regeneration gas circuit which contain a preheat gas furnace (FS, Figure 2), a reactor (S) which contains said catalyst from which said coke can be burned by contact with hot gas from said preheat gas furnace (FS), and a steam boiler (SB) through which said hot gas is passed and cooled without moisture condensation, and the cool gas injected, or returned to said secondary circuit; and (ii) the secondary gas circuit which contains a regeneration gas scrubber (GS), (optionally a gas drier (D)) and a fines solids filter (FF). The circuit also includes regeneration-gas circulation and/or compression means, e.g. a compressor (C), for circulating the gas in said circuits. A gas, constituted in major part of flue gas, is passed through the preheat gas furnace (FS), preheated, then passed into the coked catalyst-containing reactor (S) wherein the coke is combusted by contact of a combustible mixture of the gas with the catalyst, the gas heated thereby, then cooled without condensation by passage through the steam boiler (SB), and the cooled gas then injected into the secondary circuit. The hot flue gas, or gas within the secondary circuit, is conditioned for use as a purge gas within the primary circuit.