Batch methods for enriching trace impurities in hydrogen gas for their further analysis
US8778694B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Jul 13, 2010 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Dec 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided herein are batch methods and devices for enriching trace quantities of impurities in gaseous mixtures, such as hydrogen fuel. The methods and devices rely on concentrating impurities using hydrogen transport membranes wherein the time period for concentrating the sample is calculated on the basis of optimized membrane characteristics, comprising its thickness and permeance, with optimization of temperature, and wherein the enrichment of trace impurities is proportional to the pressure ratio Phi/Plo and the volume ratio V1/V2, with following detection of the impurities using commonly-available detection methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.