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'''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 H<sub>2</sub> [[Internal combustion engine|ICE]] can tolerate low hydrogen purity where a hydrogen fuel cell requires high hydrogen purity to prevent [[catalyst poisoning]]<ref>[http://www.nrel.gov/docs/fy07osti/41541.pdf 2007-DOE-Hydrogen Fuel Quality]</ref> |
'''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 H<sub>2</sub> [[Internal combustion engine|ICE]] can tolerate low hydrogen purity where a hydrogen fuel cell requires high hydrogen purity to prevent [[catalyst poisoning]].<ref>[http://www.nrel.gov/docs/fy07osti/41541.pdf 2007-DOE-Hydrogen Fuel Quality]</ref> |
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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== |
==See also== |
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*[http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/fp_workshop_smith.pdf 2004-Hydrogen Purity Standard] |
*[http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/fp_workshop_smith.pdf 2004-Hydrogen Purity Standard] |
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*[http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/fuel_purity_notes.pdf 2004-Fuel Purity Specifications Workshop] |
*[http://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/fuel_purity_notes.pdf 2004-Fuel Purity Specifications Workshop] |
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{{DEFAULTSORT:Hydrogen Purity}} |
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[[Category:Hydrogen]] |
[[Category:Hydrogen]] |
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[[Category:Hydrogen technologies]] |
[[Category:Hydrogen technologies]] |
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Revision as of 19:11, 28 December 2010
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 can tolerate low hydrogen purity where 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]