Production of carbon monoxide-free hydrogen and helium from...

Details Production of carbon monoxide-free hydrogen and helium from... Production of carbon monoxide-free hydrogen and helium from...

C - Chemistry, Metallurgy

01

B

C01B 3/56 (2006.01) B01D 53/047 (2006.01) C01B 23/00 (2006.01)

Patent

CA 2579280

The invention provides vacuum swing adsorption processes that produce an essentially carbon monoxide-free hydrogen or helium gas stream from, respectively, a high-purity (e.g., pipeline grade) hydrogen or helium gas stream using one or two adsorber beds. By using physical adsorbents with high heats of nitrogen adsorption, intermediate heats of carbon monoxide adsorption, and low heats of hydrogen and helium adsorption, and by using vacuum purging and high feed stream pressures (e.g., pressures of as high as around 1,000 bar), pipeline grade hydrogen or helium can purified to produce essentially carbon monoxide- free hydrogen and helium, or carbon monoxide, nitrogen, and methane-free hydrogen and helium.

La présente invention a pour objet des procédés d'adsorption modulée en pression produisant un circuit d'hydrogène ou d'hélium essentiellement exempt de monoxyde de carbone, à partir, respectivement, d'un circuit d'hydrogène ou d'hélium de haute pureté (p. ex., de qualité pipeline), au moyen d'un ou de deux lits adsorbants. L'utilisation d'adsorbants physiques à chaleurs d'adsorption d'azote élevées, à chaleurs d'adsorption de monoxyde de carbone intermédiaires et à chaleurs d'adsorption d'hydrogène et d'hélium faibles, et l'utilisation d'une purge sous vide et de pressions de circuit d'alimentation élevées (p. ex., pouvant atteindre 1000 bars), permettent la purification d'hydrogène ou d'hélium de qualité pipeline pour produire de l'hydrogène ou de l'hélium essentiellement exempt de monoxyde de carbone, ou de l'hydrogène ou de l'hélium exempt de monoxyde de carbone, d'azote et de méthane.

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