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Post torrefaction biomass pelletization

  • US 9,057,037 B2
  • Filed: 10/31/2012
  • Issued: 06/16/2015
  • Est. Priority Date: 04/20/2010
  • Status: Active Grant
First Claim
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1. A process for biomass torrefaction, comprising:

  • adding biomass to a reactor;

    adding a gas to the reactor;

    controlling an oxygen content of the gas;

    initiating heating of the biomass by increasing a temperature of the reactor;

    heating the biomass;

    maintaining the biomass within the reactor for a predetermined time;

    removing water from the biomass;

    vaporizing volatile organic compounds associated with the biomass;

    torrefying the biomass;

    combusting the volatile organic compounds to help maintain the temperature of the reactor; and

    forming the torrefied biomass into pellets at a temperature of about 90°

    C. to 200°

    C.

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