Patent ID: 8814963
Filing Date: 2014-08-26
Classification: B01J,C01B,C10G,C10J,C10K,Y02E,Y02P

Abstract:
1. A system for production of high quality synthesis gas, the system comprising: a first dual fluidized bed loop comprising: a gasifier operable to produce the low quality synthesis gas, wherein the gasifier is located upstream of the fluid bed conditioner and fluidly connected therewith, without intervening heat exchange apparatus, whereby at least a portion of the low quality synthesis gas may be introduced into the fluid bed conditioner as hot gas feed; at least one Fischer-Tropsch conversion reactor downstream of the first dual fluidized bed loop and operable to produce a Fischer-Tropsch tailgas, a Fischer-Tropsch catalyst slurry wax purge, and liquid hydrocarbons from at least a portion of the high quality synthesis gas; and one or more recycle line selected from the group consisting of recycle lines fluidly connecting the at least one Fischer-Tropsch conversion reactor with the first dual fluidized bed loop, recycle lines fluidly connecting the at least one Fischer-Tropsch conversion reactor with the second dual fluidized bed loop, recycle lines fluidly connecting a low quality synthesis gas outlet of the fluid bed gasifier with an inlet thereof, and recycle lines fluidly connecting a high quality synthesis gas outlet of the fluid bed conditioner with an inlet of the fluid bed gasifier, whereby at least a portion of the Fischer-Tropsch tailgas may be introduced into the fluid bed conditioner, the fluid gasifier, the fluid bed combustor, the second fluid bed combustor, or a combination thereof, a portion of the low quality synthesis gas, the high quality synthesis gas, or both may be introduced into the fluid bed gasifier as fluidization gas, or a combination thereof, wherein the gasifier is one fluid bed of a second dual fluidized bed loop comprising: