Hydropyrolysis of biomass for producing high quality liquid...

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 1/00 (2006.01)

Patent

CA 2756819

A self-sustaining process for producing liquid fuels from biomass in which the biomass is hydropyrolyzed in a reactor vessel containing molecular hydrogen and a deoxygenating catalyst, producing a partially deoxygenated pyrolysis liquid, which is hydrogenated using a hydroconversion catalyst, producing a substantially fully deoxygenated pyrolysis liquid and a gaseous mixture comprising CO and light hydrocarbon gases (C1-C4). The gaseous mixture is reformed in a steam reformer, producing reformed molecular hydrogen, which is then introduced into the reactor vessel for hydropyrolizing the biomass. The deoxygenated liquid product is further processed to produce diesel fuel and gasoline.

La présente invention concerne un procédé autonome pour la production de combustibles liquides à partir de la biomasse selon lequel la biomasse est soumise à une hydropyrolyse dans une cuve de réacteur contenant de l'hydrogène moléculaire et un catalyseur de désoxygénation, produisant un liquide de pyrolyse partiellement désoxygéné, qui est hydrogéné au moyen d'un catalyseur d'hydroconversion, permettant d'obtenir un liquide de pyrolyse sensiblement entièrement désoxygéné et un mélange gazeux comprenant du CO et des gaz d'hydrocarbures légers (C1 - C4). Le mélange gazeux est reformé dans un reformeur à vapeur, produisant de l'hydrogène moléculaire reformé, qui est ensuite introduit dans la cuve de réacteur pour l'hydropyrolyse de la biomasse. Le produit liquide désoxygéné est traité davantage pour produire du carburant diesel et de l'essence.

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