Air Products and Chemicals, Inc.

Timothy C Golden

Shubhra Jyoti Bhadra

Jeffrey Raymond Hufton

Aaron Raymond Scott

Maulik R Shelat

Kamlesh Ghodasara

Paul Higginbotham

Garret C Lau

Quan Min Shao

Venkataramanan Ravi

Vishrut Garg

Jr William J Casteel

Gaurav Kumar

A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The waste gas from regenerating the CTSA may be used to improve the performance of upstream hydrogen processing steps.

Method for producing high purity hydrogen

A hydrogen feed stream comprising one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, oxygen, and water, is contacted with liquid hydrogen in a cryogenic wash column (CWC) process that produces pure hydrogen with high overall recovery. The waste liquid stream leaving the CWC may be used to improve the performance of upstream hydrogen processing steps.

A hydrogen feed stream comprising oxygen and one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, and water, is purified using a cryogenic temperature swing adsorption (CTSA) process with high overall recovery of hydrogen. The CTSA is regenerated using an inert gas to prevent an explosive mixture of hydrogen and oxygen from occurring.

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Nevez, France

Timothy C Golden