Methods and systems for processing biomass material

  • US 9,624,436 B2
  • Filed: 05/16/2013
  • Issued: 04/18/2017
  • Est. Priority Date: 05/17/2012
  • Status: Active Grant
First Claim
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1. A method for processing a prepared biomass material comprising:

  • (i) introducing a prepared biomass material to a pressurized compartment of a recovery system, wherein the prepared biomass material contains an initial liquid content comprising ethanol and wherein the prepared biomass material is generated by adding to a lignocellulosic biomass at least one additive selected from the group consisting of a microbe, an acid, an enzyme, or any combination thereof and storing the lignocellulosic biomass material with at least one additive for at least 24 hours;

    (ii) contacting the prepared biomass material with a superheated vapor stream in the pressurized compartment to vaporize at least a portion of the initial liquid content in the prepared biomass material to provide a vapor component, wherein the superheated vapor stream is about 100°

    C. to about 375°

    C., and the recovery system is operated at a pressure range of about 3 psig to about 60 psig;

    (iii) retaining an amount of the vapor component comprising ethanol in a range of 1 wt % to 50 wt % for use as part of the superheated vapor stream;

    (iv) releasing from the recovery system at least a portion of the prepared biomass material after vaporization to provide a solid component; and

    (vi) contacting at least a portion of the solid component with a solution adapted to facilitate saccharification.

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