Reactions of fuel-nitrogen in rich flame gases
| Autor: | C.P. Fenimore |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
General Chemical Engineering
Inorganic chemistry Analytical chemistry General Physics and Astronomy Energy Engineering and Power Technology chemistry.chemical_element General Chemistry Nitrogen Ammonia chemistry.chemical_compound Fuel Technology Primary reaction chemistry Yield (chemistry) Elementary reaction Pyridine Mole |
| Zdroj: | Combustion and Flame. 26:249-256 |
| ISSN: | 0010-2180 |
| DOI: | 10.1016/0010-2180(76)90075-4 |
| Popis: | Fuel-nitrogen fed as ammonia or as pyridine to rich flames is mainly present in the burnt gas in the forms HCN, NH3, NO and N2. The HCN decays in this region to form more NH3, and the NH3(or species equilibrated with NH3)undergoes two types of reactions: an oxidation to NO at rate R1, reaction with NO to form N2 at rate R2. The total remaining fuel-N not yet converted to NO or N2, i.e. RN = HCN + NH3, therefore decays in accordance with -d[RN] dt =R1 + R2 , and the simultaneous change in NO is -d[NO] dt =R1 − R2 , Empirically, these rates can be epxressed R 1 5×10 12 [ H 2 O ] 2 [ NH 2 ] [ H 2 e −20 kcal /RT mole cc,sec , R 2 = 9×10 12 [ NO ] [ NH 2 . R1 is not readily interpreted in terms of elementary reactions; R2 is the rate of NO + NH2 → N2 + H2O. The findings are not necessarily valid in the primary reaction zone where other processes also occur. To the extent that all the fuel-N added to rich flames attains NO and N2 in accordance with R1 and R2, however, the yield of NO is predictable a priori. The prediction agrees roughly with the yields observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|