Hydrogen and carbon monoxide production by partial oxidation...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/34 (2006.01) C01B 3/36 (2006.01) C01B 3/56 (2006.01) C01B 31/18 (2006.01)

Patent

CA 2100811

Synthesis gas comprising hydrogen, water, carbon monoxide, carbon dioxide, and hydrocarbons is produced by contacting a gasified hydrocarbon feedstock and an oxidant in a partial oxidation reactor under at least 95% carbon monoxide selective, low hydrocarbon conversion conditions wherein the temperature, pressure, and flow rate conditions in the reactor yield synthesis gas having less than about 2% carbon dioxide. After being cooled, The synthesis gas is separated into high purity hydrogen, high purity carbon monoxide and a hydrogen-carbon monoxide gas mixture by pressure swing adsorption followed by cryogenic distillation or by two or more pressure swing adsorption steps.

On obtient un gaz de synthèse comprenant de l'hydrogène, de l'eau, du monoxyde de carbone, du dioxyde de carbone et des hydrocarbures en faisant interagir des hydrocarbures sous forme gazeuse et un oxydant dans un réacteur d'oxydation partielle ajusté de façon à produire un rendement de monoxyde de carbone à 95 % et à maintenir un faible rendement de conversion des hydrocarbures, tout en utilisant des conditions de température, de pression et de débit du fluide qui conduisent à un rendement d'au plus 2 % quant à la synthèse de dioxyde de carbone. Le gaz de synthèse est d'abord refroidi, puis séparé en hydrogène de haute pureté, en monoxyde de carbone, également de haute pureté, et en un mélange d'hydrogène et de monoxyde de carbone à l'aide de la technique d'adsorption par excursion de pression, puis d'une distillation à très basse température, ou encore par deux étapes ou plus d'adsorption par excursion de pression.

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