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Batch methods for enriching trace impurities in hydrogen gas for their further analysis

United States Patent

July 15, 2014
View the Complete Patent at the US Patent & Trademark Office
Accurate Detection of Impurities in Hydrogen Fuel at Lower Cost
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 P.sub.hi/P.sub.lo and the volume ratio V.sub.1/V.sub.2, with following detection of the impurities using commonly-available detection methods.
Ahmed; Shabbir (Naperville, IL), Lee; Sheldon H. D. (Willowbrook, IL), Kumar; Romesh (Naperville, IL), Papadias; Dionissios D. (Chicago, IL)
Uchicago Argonne, LLC (Chicago, IL)
12/ 835,614
July 13, 2010
CONTRACTUAL ORIGIN OF THE INVENTION The U.S. Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357 between the U.S. Department of Energy and UChicago Argonne, LLC, as operator of Argonne National Laboratory.