C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
C10B 49/20 (2006.01) C10B 53/02 (2006.01) C10C 5/00 (2006.01)
Patent
CA 2618000
Disclosed is a method for rapidly pyrolyzing lignocellulose. The aim of the invention is to create an improved rapid lignocellulose pyrolysis method which above all substantially reduces the risk of the pyrolysis condensate and the pyrolysis coke being accidentally contaminated by dust. Said aim is achieved by a method comprising the following steps: the lignocellulose (1) is mechanically reduced (2) to lignocellulose particles (3); the lignocellulose particles (3) are completely dried and/or preheated; the lignocellulose particles are mixed (5) with heat transferring particles so as to obtain a mixture, said heat transferring particles (6) being heated to a temperature ranging between 500 ~C and 650 ~C before being mixed; and the lignocellulose particles are heated without oxygen by means of the heat transferring particles in a pyrolysis reactor. During said last step, a temperature ranging between 400 ~C and 600 ~C is obtained for one to 50 seconds while the lignocellulose particles react to pyrolysis coke (8), pyrolysis condensate (9), and pyrolysis gas (11).
La présente invention concerne un procédé de pyrolyse rapide de lignocellulose. L'objectif de la présente invention est de mettre au point un procédé amélioré de pyrolyse rapide de lignocellulose qui permette de réduire considérablement le risque d'une contamination indésirable du condensat de pyrolyse et du coke de pyrolyse par abrasion. A cette fin, le procédé comprend un broyage mécanique (2) de la lignocellulose (1) sous forme de particules de lignocellulose (3), un séchage complet et/ou un préchauffage des particules de lignocellulose, un mélange (5) des particules de lignocellulose avec des particules thermoconductrices, afin de former un mélange, les particules thermoconductrices (6) étant chauffées avant le mélange à une température comprise entre 500 °C et 650 °C, puis un chauffage des particules de lignocellulose par les particules thermoconductrices, en l'absence d'oxygène, dans un réacteur de pyrolyse, une température comprise entre 400 et 600 °C s'établissant pendant une à 50 secondes et les particules de lignocellulose réagissant de manière à former du coke de pyrolyse (8), un condensat de pyrolyse (9) et un gaz de pyrolyse (11).
Dinjus Eckhard
Henrich Edmund
Weirich Friedhelm
Fetherstonhaugh & Co.
Forschungszentrum Karlsruhe Gmbh
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