Equipment and a method for generating biofuel based on rapid pyrolysis of biomass
Inactive Publication Date: 2011-09-15
UNIV DE CONCEPCION
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These heat transfer problems are central to any successful development that requires extreme operation conditions in the pyrolysis reactor.
The problem presented by using an overheated particulate material as the only heat source is that said material must be heated well over the optimal pyrolysis temperature in order to supply the heat amount required for the pyrolysis reactions.
This causes that when the organic material enters into contact with the overheated inert material, the former can be partially gasified and the generation of condensable vapors can be impaired, which lowers the biofuel yield.
Additionally, all the previous patents use recycling fluidized bed systems in which all the p
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Radiata pine sawdust containing 11.3% of moisture content and having a size lower than 3 mm was pyrolyzed under the following conditions:
Temperature520° C.Mean reaction time of the solid4 secResidence time of the vapors3 secFeeding rate35 kg / h
Pyrolysis vapors were quickly condensed to produce a biofuel that represented 68.3% of the initial mass; a pyrolysis gas with 13.5% of the initial mass and fine charcoal less than 1.5 mm with 18.2% of the feed mass by weight.
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Equipment and a process to produce biofuel by fast pyrolysis of organic material, comprising a system of three interconnected serial fluidized bed reactors: a fast pyrolysis reactor located inside another reactor wherein charcoal is burned; a combustion reactor that burns the charcoal generated in the fast pyrolysis reactor; and a preheating reactor to preheat inert particulate material. The equipment also includes a pneumatic recycling system for inert particulate material.
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