Hydrotreating carbohydrates

C - Chemistry – Metallurgy – 10 – G

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C10G 49/00 (2006.01) C10G 3/00 (2006.01) C10L 1/06 (2006.01)

Patent

CA 2747531

Conversion of renewable hydrocarbons to transportation fuels is required to reduce carbon emission, limit the use of fossil fuels, and develop renewable energy sources. Sorbitol, xylitol and trehelose are polyalcohols generated from the liquefaction of various sugars and carbohydrates in biomass from algae, corn, sugarcane, switchgrasses, and biological wastes. Mixtures of aqueous polyols and fuel feedstocks are catalyzed over metal catalysts to produce hexanes, pentanes, and lighter hydrocarbons. By managing the catalyst, reaction conditions and sulfur content, the octane value of the product fuel is dramatically increased.

Selon l?invention, une conversion d'hydrocarbures renouvelables en combustibles pour le transport est nécessaire afin de réduire l?émission de carbone, de limiter l'utilisation de combustibles fossiles et de développer des sources d'énergie renouvelables. Le sorbitol, le xylitol et le tréhalose sont des polyalcools générés par la liquéfaction de divers sucres et glucides dans une biomasse provenant d'algues, de maïs, de canne à sucre, de panic raide et de déchets biologiques. Des mélanges de polyols aqueux et de charges d'alimentation de combustible sont catalysés sur des catalyseurs métalliques afin de produire des hexanes, des pentanes et des hydrocarbures plus légers. Par la gestion du catalyseur, des conditions réactionnelles et de la teneur en soufre, l'indice d'octane du combustible obtenu comme produit est augmenté de façon spectaculaire.

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