Fuel pellet comprising an agricultural biomass

C - Chemistry – Metallurgy – 10 – L

Patent

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Details

C10L 5/44 (2006.01)

Patent

CA 2663750

Fuel pellets which include substantial amounts of agricultural biomass having a relatively low lignin content are provided. The fuel pellets have a low ash content, good pellet durability (e.g., as determined by their pellet durability index) and heating values comparable to conventional hardwood fuel pellets. The fuel pellet may be formed by pelleting a mixture comprising agricultural biomass which includes whole corn, corn cobs, corn stover, wheat, wheat middlings, wheat straw, soy beans, soy bean hulls, soy cotyledon fiber, alfalfa, dried distillers grain, oats, oat straw, sugar beet pulp and/or sunflower hulls. Other suitable agricultural biomass materials which may be used to form the fuel pellets include co-products from corn milling processes (e.g. corn gluten feed, white fiber), oat hulls, rice hulls, rapeseed meal, rapeseed fractions, bagasse, ground barley, cottonseed hulls, whole cottonseed, ground milo, oatmeal, oat flour, rye, broken rice and empty palm fruit bundles.

L'invention concerne des pastilles de combustible contenant des quantités importantes de biomasse agricole à teneur en lignine relativement faible. Ces pastilles présentent une faible teneur en cendres, une bonne durabilité (définie, par exemple, par leur indice de durabilité) et des valeurs de chauffage comparables aux pastilles de combustible en bois dur classiques. Les pastilles selon l'invention peuvent être obtenues par bouletage d'un mélange contenant de la biomasse agricole contenant du maïs entier, des épis de maïs, de la canne de maïs, du blé, du remoulage bis, de la paille de blé, du soja, des cosses de soja, des fibres de cotylédons de soja, de la luzerne, de la drêche sèche de distillerie, de l'avoine, de la paille d'avoine, de la pulpe de betterave et/ou des cosses de tournesol. Les autres matériaux issus de la biomasse agricole pouvant être utilisés pour fabriquer ces pastilles de combustible comprennent des coproduits issus des processus de maïserie (par exemple, du gros gluten de maïs, de la fibre blanche), des bales d'avoine, des écorces de riz, de la farine de colza, des fractions de colza, de la bagasse, de l'orge moulu, des coques de coton, du coton entier, du sorgho moulu, de la farine de gruau, de la farine d'avoine, du seigle, de la brisure de riz et des balles de fruits de palmier à huile vides.

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