Method for the combined production of butanol and hydrogen

C - Chemistry – Metallurgy – 12 – P

Patent

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Details

C12P 3/00 (2006.01) C12P 7/16 (2006.01) C01B 3/02 (2006.01) C12N 1/20 (2006.01)

Patent

CA 2728684

The invention relates to a process for the combined production of butanol and hydrogen from biomass, comprising the steps of fermenting biomass to obtain butanol in a first reaction mixture; removing the butanol and hydrogen from the first reaction mixture to obtain effluent; and using the effluent as a substrate in a second reaction mixture in a process using low substrate concentrations, in particular a hydrogen production process. Preferably, the process using low substrate concentrations is a hydrogen production process and at least part of the end products of the hydrogen production process is removed from the second reaction mixture for obtaining an effluent that comprises organic acid, which effluent is returned to the first reaction mixture.

L'invention porte sur un procédé pour la fabrication combinée de butanol et d'hydrogène à partir de biomasse, consistant à faire fermenter de la biomasse pour obtenir du butanol dans un premier mélange réactionnel ; à enlever le butanol et l'hydrogène du premier mélange réactionnel pour obtenir un effluent ; et à utiliser l'effluent en tant que substrat dans un second mélange réactionnel dans un procédé utilisant de faibles concentrations en substrat, en particulier un procédé de fabrication d'hydrogène. De préférence, le procédé utilisant de faibles concentrations en substrat est un procédé de fabrication d'hydrogène et au moins une partie des produits finaux du procédé de fabrication d'hydrogène est enlevée du second mélange réactionnel pour obtenir un effluent qui renferme un acide organique, lequel effluent est renvoyé vers le premier mélange réactionnel.

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