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NOx emission characteristics in rich–lean combustion of hydrogen

✍ Scribed by Toshio Shudo; Takashi Mizuide

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
293 KB
Volume
23
Category
Article
ISSN
0389-4304

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✦ Synopsis

Characteristics of NO x formation in a gas turbine fuelled with hydrogen were analyzed with both an experimental and a numerical approach. This research experimentally investigated NO x reduction effect of rich-lean combustion in a coaxial burner. Hydrogen emits no Prompt NO even in rich mixture conditions, and can be more effective to reduce NO x in the rich-lean combustion system than hydrocarbons. The results show that the rich-lean combustion of hydrogen successfully reduces NO x emission compared with diffusive combustion. In the rich-lean combustion, hydrogen combustion has lower NO x emission compared to methane combustion, especially with larger equivalence ratio of richer side mixture. Calculations of NO x formation in the rich-lean combustion were also done employing the extended Zel'dovich NO formation mechanism.

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