Effects of hydrogen addition to fuel on soot formation and NO x emission in diffusion flames

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TypeArticle
Journal titleKung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
ISSN0253-231X
Volume32
IssueSUPPL. 1
Pages264267; # of pages: 4
SubjectAxisymmetric; Co-flow; Constant volumes; Diffusion Flame; Effect of hydrogen; Flame height; Fuel jet; Fuel nozzle; Gas phase chemistry; Heat release rates; Hydrogen addition; Methane-air diffusion flames; Numerical studies; Reaction zones; Residence time; Soot formation; Soot formations; Surface growth; Air; Diffusion; Fuels; Hydrogen; Methane; Soot; Transport properties; Dust
AbstractA numerical study of soot formation and NO x emission in axisymmetric coflow laminar methane/hydrogen-air diffusion flame was conducted using detailed gas-phase chemistry and complex thermal and transport properties. To investigate the impact of hydrogen addition, three cases were studied, namely, Case 1, maintaining a constant volume flow of fuel. Case 2, maintaining the fuel heat release rate unchanged, and the fuel nozzle diameter unchanged. Case 3, maintain the fuel heat release rate unchanged, and the fuel jet velocity constant. The results show that, in all three cases, with increasing level of H 2 addition, the flame height decreased, the reaction zone length shortened, residence time shortened, therefore, soot surface growth was inhibited, soot formation reduced, and NO x emissions reduced. Effects of hydrogen addition on soot formation and NO x emissions in Case 2 and Case 3 were much worse than that in Case 1. The results also show that while in reducing soot formation and NO x emission, effect of hydrogen addition in Case 3 was better than that in Case 2.
Publication date
LanguageChinese
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE)
Peer reviewedYes
NPARC number21271035
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Record identifier958c8221-ebde-4171-a185-ef2d6ae2f576
Record created2014-03-24
Record modified2016-05-09
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