Counter-current fluidized bed reactor for the dehydrogenation of olefins

摘要

A process and apparatus for the dehydrogenation of paraffins is presented. The process utilizes a reactor that includes a slower flow of catalyst through the reactor, with a counter current flow of gas through the catalyst bed. The catalyst is regenerated and distributed over the top of the catalyst bed, and travels through the bed with the aid of reactor internals to limit backmixing of the catalyst.

主权项

1. A process for dehydrogenation of hydrocarbons comprising:
flowing a catalyst in a catalyst bed, in a downward direction, through a dehydrogenation reactor, wherein the catalyst is added at a catalyst inlet temperature of at least 650° C.; and flowing a paraffinic feedstream in an upward direction through the catalyst bed, thereby contacting the paraffinic feedstream with the catalyst at dehydrogenation reaction conditions, thereby generating a product stream, wherein the paraffinic feedstream is added at a paraffinic feedstream inlet temperature of at least 400° C. and less than 600° C., wherein the paraffinic feedstream travels in an upward direction through the dehydrogenation reactor, providing for a substantially countercurrent flow of catalyst and paraffinic feedstream and wherein the paraffinic feedstream inlet temperature is between 100° C. and 250° C. below the catalyst inlet temperature, wherein the catalyst bed includes a packing grid comprising multiple layers of ribbons, wherein the ribbons refer to metal strips formed and angled relative to each other and the layers are stacked to be in contact with neighboring layers.