The present invention relates to a method for purifying a tar containing gas stream. The method comprises the steps of:
a) contacting a tar containing gas stream with a washing liquid in a washing unit to obtain a tar containing washing liquid and a purified gas stream;
b) adding an extractant to the tar containing washing liquid to obtain an extraction liquid comprising a tar containing extractant and a regenerated washing liquid;
c) cooling the extraction liquid;
d) after cooling, separating the tar containing extractant from the regenerated washing liquid, and
e) recirculating the regenerated washing liquid to the washing unit.
The present inventive concept relates to a system for production and conditioning of high-quality biochar. The system comprises a gasification reactor adapted to transform biomass to syngas and biochar by a first thermochemical conversion and a biochar purification unit adapted to subject the biochar to a second thermochemical conversion and thereby prolonging conversion residence time. A first part of the biochar purification unit comprises a biochar inlet fluidly connected to the gasification reactor and a second part of the biochar purification unit, arranged downstream from the first part, comprises an inert gas inlet for purging the biochar within the biochar purification unit.
C10L 5/40 - Solid fuels essentially based on materials of non-mineral origin
C10J 3/00 - Production of gases containing carbon monoxide and hydrogen, e.g. synthesis gas or town gas, from solid carbonaceous materials by partial oxidation processes involving oxygen or steam
The present invention relates to a biomass gasification system providing tar and biochar and to a method wherein tars are fixed to the biochar surface. The present invention also relates to use of said system.
The present invention relates to a biomass gasification system providing tar and biochar and to a method wherein tars are fixed to the biochar surface. The present invention also relates to use of said system.
A gasification system and a method for gasifying a particulate carbonaceous fuel are disclosed. The gasification system has a gasification chamber with an upper section and a lower section with a fuel inlet for injecting a particulate carbonaceous fuel and oxidant into the upper section whereby, in a thermo-chemical reaction, synthesis gas and residual char is generated. The gasification system further includes a separator configured to receive the synthesis gas and to separate residual tar form the synthesis gas. Further, there is a char bed disposed in the lower section formed by residual char generated in the thermo-chemical reaction and a gas-inlet at a bottom portion of the lower section for injecting gas into the char bed. The residual tar is injected into the char bed whereby, in a thermal cracking process, the residual tar is converted into synthesis gas. Hereby, it is possible to utilize the otherwise lost energy contained in the residual tar, and thereby achieve better efficiency in a gasification system, in a cost-effective and simple manner.
C10J 3/84 - Gas withdrawal means with means for removing dust or tar from the gas
C10B 49/22 - Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with moving solid heat-carriers in divided form in dispersed form according to the "fluidised bed" technique
The present invention relates to a gasification system and a method for gasifying carbonaceous material in order to produce synthesis gas. The system has a gasification reactor which is configured to generate synthesis gas that is to be moved through a wet scrubber in order to cool the gas and remove unwanted residues. The scrubbing step results in the generation of a tar-and-water reject which is injected into a separation device having a perforated surface and where the separator device is configured to allow the tar-and-water liquid reject to travel of the perforated surface. Hereby presenting a gasification system capable of efficiently handling the problems associated with tar-and-water reject resulting from the scrubbing step in a cost effective and time efficient manner.
A gasification system and a method for gasifying a particulate carbonaceous fuel are disclosed. The gasification system has a gasification chamber with an upper section and a lower section with a fuel inlet for injecting a particulate carbonaceous fuel and oxidant into the upper section whereby, in a thermochemical reaction, synthesis gas and residual char is generated. The gasification system further includes a separator configured to receive the synthesis gas and to separate residual tar form the synthesis gas. Further, there is a char bed disposed in the lower section formed by residual char generated in the thermo-chemical reaction and a gas-inlet at a bottom portion of the lower section for injecting gas into the char bed. The residual tar is injected into the char bed whereby, in a thermal cracking process, the residual tar is converted into synthesis gas. Hereby, it is possible to utilize the otherwise lost energy contained in the residual tar, and thereby achieve better efficiency in a gasification system, in a cost-effective and simple manner.
A gasification system and a method for gasifying a particulate carbonaceous fuel are disclosed. The gasification system has a gasification chamber with an upper section and a lower section with a fuel inlet for injecting a particulate carbonaceous fuel and oxidant into the upper section whereby, in a thermo-chemical reaction, synthesis gas and residual char is generated. The gasification system further includes a separator configured to receive the synthesis gas and to separate residual tar form the synthesis gas. Further, there is a char bed disposed in the lower section formed by residual char generated in the thermo-chemical reaction and a gas-inlet at a bottom portion of the lower section for injecting gas into the char bed. The residual tar is injected into the char bed whereby, in a thermal cracking process, the residual tar is converted into synthesis gas. Hereby, it is possible to utilize the otherwise lost energy contained in the residual tar, and thereby achieve better efficiency in a gasification system, in a cost-effective and simple manner.
C10J 3/84 - Gas withdrawal means with means for removing dust or tar from the gas
C10K 3/00 - Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
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