Hydrogen purity: Difference between revisions
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'''Hydrogen purity''' or hydrogen quality is a term to describe the lack of impurities in [[hydrogen]] as a [[fuel]]. The purity requirement varies with the application, for example a H<sub>2</sub> [[Internal combustion engine|ICE]] requires low hydrogen purity were 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]] requires low hydrogen purity were 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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Revision as of 05:42, 21 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]