METHODS FOR FORMING LIGHT OLEFINS UTILIZING HEAT EXCHANGER SYSTEMS

Abstract: a method for forming light olefins may include reacting a feed stream in the presence of a catalyst in a reactor to form a product stream, separating at least a portion of the product stream from the catalyst, and passing the catalyst to a catalyst processing portion of the reactor system and processing the catalyst to produce a processed catalyst and a flue gas. the catalyst may be heated, coke may be removed from the catalyst, or both, in a combustor in the catalyst processing portion. the method may further comprise separating the catalyst from the flue gas, and passing the flue gas though a heat exchanger system to cool the flue gas. heat may be exchanged from the flue gas to an oxygen-containing gas in an inlet stream. the oxygen-containing gas may exit the heat exchanger system in a first stream and a second stream. the oxygen-containing gas in the first stream may have a temperature greater than that of the oxygen-containing gas in the second stream. the method may further comprise passing the oxygen-containing gas in the first stream directly to the combustor, and passing the oxygen-containing gas in the second stream to one or more of a catalyst transport pipe as a solid transport fluid, or an oxygen treatment zone.

Inventor(s): Matthew T. Pretz

CPC Classification: C10G11/185 ({Energy recovery from regenerator effluent gases})

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