Systems and methods for regulating heating assembly...

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 3/56 (2006.01) B01D 53/047 (2006.01)

Patent

CA 2589938

Pressure swing adsorption (PSA) assemblies with purge control systems, and hydrogen-generation assemblies and/or fuel cell systems containing the same. The PSA assemblies are operated according to a PSA cycle to produce a product hydrogen stream and a byproduct stream from a mixed gas stream. The byproduct stream may be delivered as a fuel stream to a heating assembly, which may heat the hydrogen-producing region that produces the mixed gas stream. The PSA assemblies may be adapted to regulate the flow of purge gas utilized therein, such as according to a predetermined, non-constant profile. In some embodiments, the flow of purge gas is regulated to maintain the flow rate and/or fuel value of the byproduct stream at or within a determined range of a threshold value, and/or to regulate the flow of purge gas to limit the concentration of carbon monoxide in a heated exhaust stream produced from the byproduct stream.

L'invention concerne des ensembles à adsoprtion modulée en pression à systèmes de commande de purge, et des ensembles de production d'hydrogène et/ou des systèmes de piles à combustible les contenant. Les ensembles à adsoprtion modulée en pression fonctionnent selon un cycle d'adsoprtion modulée en pression, pour la production d'un flux d'hydrogène produit et d'un flux sous-produit, à partir d'un flux mixte. Le flux sous-produit peut être fourni comme flux de combustible à l'ensemble chauffant, permettant ainsi de chauffer la zone de production d'hydrogène qui produit le flux de gaz mixte. Les ensembles en question peuvent être adaptés pour la régulation du flux de gaz de purge utilisé, par exemple compte tenu d'un profil préétabli non constant. Selon certaines variantes, le flux de gaz de purge est régulé pour le maintien du débit et/ou de la valeur combustible du flux sous-produit à une valeur de seuil ou dans une gamme seuil préétablie, et/ou pour limiter la concentration de monoxyde de carbone dans un flux d'échappement chauffé issu du flux sous-produit.

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