Process for Producing Hydrogen with Various Levels of Purity by H2 PSA
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsFrancois Fuentes, Guillaume Rodrigues
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Abstract
A process for producing hydrogen from a gas mixture comprising hydrogen (H2), and at least one impurity to be eliminated using an H2 PSA unit comprising N adsorbers subjected to a pressure cycle of duration T with N>1, comprising the following successive steps: a) said gas mixture is introduced into said unit, b) at least a first hydrogen-enriched stream having a mean impurity content Ypd is extracted, c) at least a second hydrogen-enriched stream having a mean impurity content Yhp is extracted, d) at least a third hydrogen-enriched stream having a mean impurity content Ypd′ is extracted, with Ypd>3Yhp and Ypd′>3Yhp.
Claims14
1-13. (canceled)
A process for producing hydrogen from a gas mixture comprising hydrogen (H2), and at least one impurity to be eliminated using an H2 PSA unit comprising N adsorbers subjected to a pressure cycle of duration T with N>1, comprising a production phase comprising the following successive steps:
- a) said gas mixture is introduced into said unit,
- b) at least a first hydrogen-enriched stream having a mean impurity content Ypd is extracted,
- c) at least a second hydrogen-enriched stream having a mean impurity content Yhp is extracted,
- d) at least a third hydrogen-enriched stream having a mean impurity content Ypd′ is extracted,
- with Ypd>3Yhp and Ypd′>3Yhp, and the steps b), c) and d) being carried out during the production phase of each of the cycles of the N adsorbers.
Dependencies are inferred from the claim text.