کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5145238 | 1497339 | 2017 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
NO formation of opposed-jet syngas diffusion flames: Strain rate and dilution effects
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: NO formation of opposed-jet syngas diffusion flames: Strain rate and dilution effects NO formation of opposed-jet syngas diffusion flames: Strain rate and dilution effects](/preview/png/5145238.png)
چکیده انگلیسی
The NO formation characteristics and reaction pathways of opposed-jet H2/CO syngas diffusion flames were analyzed with a revised OPPDIF program which coupled a narrowband radiation model with detailed chemical kinetics in this work. The effects of strain rates ranging from 0.1 to 1000 sâ1 and diluents including CO2, H2O and N2 on NO production rates were investigated for three typical syngas compositions. The numerical results demonstrated that NO is produced primary through NNH-intermediate route and thermal route at high strain rates, where the reaction of NHÂ +Â OÂ =Â NOÂ +Â H (R51) also become more active. Near the strain rate of 10 sâ1, the flame temperature is the highest and thermal route is the dominant NO formation route, but NO would be consumed by reburn route where NO is converted to NH through HNO, especially for H2-rich syngas. At low strain rates, radiative heat loss results in a lower flame temperature and further reduce NO formation, while the reaction of NÂ +Â CO2Â =Â NOÂ +Â CO (R140) become more important, especially for CO-rich syngas. With the diluents, NO production rates decreased with increasing dilution percentages. When the flame temperature is very high as the thermal route is dominant near strain rate of 10 sâ1, CO2 dilution makes flame temperature and NO production rate the lowest. Toward both lower and higher strain rates, adding H2O is more effective in reducing NO because R140 and NNH-intermediate route are suppressed the most by H2O dilution respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 38, 21 September 2017, Pages 24517-24531
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 38, 21 September 2017, Pages 24517-24531
نویسندگان
Kuo-Hsing Yang, Hsin-Yi Shih,