Use of activated carbon adsorbent in argon and/or oxygen controlling hydrogen PSA
US6261343A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Mar 2, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2203/047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a pressure swing adsorption process. The process includes providing a pressure swing adsorption apparatus having a discharge end adsorption layer of activated carbon, feeding through the apparatus a feed gas including hydrogen, carbon monoxide and at least one of argon and oxygen, and collecting a product gas from the apparatus, wherein the product gas is high purity hydrogen. Also provided is a method for decreasing an amount of impurities in a product gas from a pressure swing adsorption process for separating hydrogen from impurities including carbon monoxide, and at least one of argon and oxygen. The method includes providing an improved adsorption layer in at least a discharge end of a pressure swing adsorption apparatus in which the pressure swing adsorption process is conducted, wherein the improved adsorption layer includes activated carbon in an amount effective to: (a) decrease the amount of impurities in the product gas; (b) increase a time until initial impurity breakthrough; and (c) improve hydrogen recovery of the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.