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==High purity hydrogen== |
==High purity hydrogen== |
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In the first generation of [[fuel cell]]s [[catalyst]]s like [[palladium]], [[ruthenium]] and [[platinum]] are used in combination with [[hydrogen production]] from hydrocarbons which results in performance degradation. The catalyst poisoning induced by [[carbon monoxide]], [[formic acid]], or [[formaldehyde]] can be reversed with a high purity hydrogen stream. [[Sulfur dioxide]] is problematic<ref>[http://www.ottawapolicyresearch.ca/OPRA_Brief_H2PurityDetectionMonitoring.pdf Issues in hydrogen purity detection and monitoring]</ref> |
In the first generation of [[fuel cell]]s [[catalyst]]s like [[palladium]], [[ruthenium]] and [[platinum]] are used in combination with [[hydrogen production]] from hydrocarbons which results in performance degradation. The catalyst poisoning induced by [[carbon monoxide]], [[formic acid]], or [[formaldehyde]] can be reversed with a high purity hydrogen stream. [[Sulfur dioxide]] is problematic<ref>[http://www.ottawapolicyresearch.ca/OPRA_Brief_H2PurityDetectionMonitoring.pdf Issues in hydrogen purity detection and monitoring]</ref> |
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==See also== |
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*[[Katharometer]] |
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==References== |
==References== |
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Revision as of 10:13, 24 November 2008
Hydrogen purity or hydrogen quality is a term to describe the lack of impurities in hydrogen as a fuel gas. The purity requirement varies with the application, for example a H2 ICE requires low hydrogen purity were a hydrogen fuel cell requires high hydrogen purity to prevent catalyst poisoning[1].
High purity hydrogen
In the first generation of fuel cells catalysts like palladium, ruthenium and platinum are used in combination with hydrogen production from hydrocarbons which results in performance degradation. The catalyst poisoning induced by carbon monoxide, formic acid, or formaldehyde can be reversed with a high purity hydrogen stream. Sulfur dioxide is problematic[2]