Combustion device producing hydrogen with collected co2 reuse

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 3/38 (2006.01) B01J 8/06 (2006.01) C01B 3/48 (2006.01) F23C 10/04 (2006.01) F23L 7/00 (2006.01)

Patent

CA 2602783

The combustion device according to the invention produces gases containing CO2 and water vapour and comprises a circulating fluidized bed reaction chamber (1,2), a separator (10,20), heat recovery means of which a part is situated in a dense fluidized bed (12,12a,22), wherein the part located in the bed of the heat recovery system(s) is composed of catalyst tubes (120,120a,220) through which a gas mixture flows. The gas mixture is composed of natural gas and/or naphtha or refinery gas or two or more of these gases. The gas undergoes reformation which converts it into a synthesis gas containing hydrogen. The fact of the catalyst tubes being situated in the dense fluidized bed made up of ashes from the combustion allows the catalyst to be reheated in a homogenous manner and the reforming reaction of the natural gas mixture to be stimulated.

Le dispositif de combustion selon l'invention, produit des fumées contenant du CO2 de la vapeur d'eau et comprend une chambre de réaction à lit fluidisé circulant un séparateur des moyens récupérateur de chaleur dont une partie est disposée dans un lit fluidisé dense, il est caractérisé en ce que la partie des moyens récupérateur de chaleurs disposée dans le lit sont constitués de tubes catalytiques parcourus par un mélange de gaz. Le mélange de gaz est composé de gaz naturel et/ou de naphte ou du gaz de raffinerie ou des deux ou de plusieurs de ces gaz. Le gaz subit un reformage qui le transforme en gaz de synthèse contenant de l'hydrogène. Le fait de disposer les tubes catalytiques dans le lit fluidisé dense constitué par les cendres issues de la combustion permet de réchauffer le catalyseur de façon homogène et de favoriser la réaction de réformage du mélange de gaz naturel.

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