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METHOD FOR HEATING A FEEDSTOCK

  • US 20130071903A1
  • Filed: 09/20/2012
  • Published: 03/21/2013
  • Est. Priority Date: 09/20/2011
  • Status: Abandoned Application
First Claim
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1. A method for producing a pretreated or hydrolyzed lignocellulosic feedstock comprising:

  • (i) feeding a lignocellulosic feedstock to a plug formation device and forming a feedstock plug therein;

    (ii) feeding the plug or segments thereof into an elongate chamber having at least a portion thereof that is cylindrical, said chamber having steam addition means for direct steam addition and a rotating shaft mounted therein having one or more disintegrating elements arranged thereon;

    (iii) producing disintegrated feedstock particles in said elongate chamber by said disintegrating elements;

    (iv) heating the disintegrated feedstock particles by contacting the particles with steam introduced through said steam addition means, wherein the operating pressure in the chamber is at least about 90 psia; and

    thereafter(v) pretreating or hydrolyzing the disintegrated feedstock particles in a reactor to produce the pretreated or hydrolyzed lignocellulosic feedstock.

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