Biochar purification unit
AssigneeMeva Energy AB
InventorsMattias Kindstrand, Niklas Strandberg
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Abstract
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.
Claims18
A system for production and conditioning of biochar, said system comprising:
- a gasification reactor adapted to transform biomass to syngas and biochar by a first thermochemical conversion;
- and
- a biochar purification unit adapted to subject said biochar to a second thermochemical conversion and thereby prolonging conversion residence time,
- wherein a first part of said biochar purification unit comprises a biochar inlet fluidly connected to said gasification reactor and a second part of said biochar purification unit, arranged downstream from said first part, comprises an inert gas inlet for purging said biochar within said biochar purification unit;
- and
- wherein said biochar purification unit comprises an oxidant gas inlet located in said first part of said biochar purification unit.
A process for production and conditioning of biochar with a system comprising a gasification reactor and a biochar purification unit, said process comprising:
- in said gasification reactor, transforming biomass to syngas and biochar by a first thermochemical conversion;
- feeding said biochar to said biochar purification unit to transform said biochar into partly purified biochar and syngas by a second thermochemical conversion;
- in said biochar purification unit, purging said partly purified biochar with inert gas to carry remaining hydrocarbon volatiles from said partly purified biochar;
- and
- feeding an oxidant into said biochar purification unit to promote said second thermochemical conversion;
- wherein a first part of said biochar purification unit comprises a biochar inlet fluidly connected to said gasification reactor and a second part of said biochar purification unit, arranged downstream from said first part, comprises an inert gas inlet for purging said biochar within said biochar purification unit.
Dependencies are inferred from the claim text.