The characteristics and mechanism of NO formation during pyridine oxidation in O2/N2 and O2/CO2 atmospheres
| Autor: | Jing Huixiang, Sizhe Cheng, Jianghui Luo, Yizhuo He, Chun Zou |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Reaction mechanism
Atmospheric pressure Chemistry 020209 energy Mechanical Engineering Analytical chemistry Mechanism based 02 engineering and technology Building and Construction Kinetic energy Pollution Industrial and Manufacturing Engineering chemistry.chemical_compound General Energy 020401 chemical engineering Pyridine 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Electrical and Electronic Engineering Plug flow reactor model No formation Stoichiometry Civil and Structural Engineering |
| Zdroj: | Energy. 187:115954 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2019.115954 |
| Popis: | The characteristics and mechanism of NO formation during pyridine oxidation in O2/CO2 atmospheres are investigated both experimentally and numerically. Comparison experiments in O2/N2 and O2/CO2 atmospheres are performed in a flow reactor at atmospheric pressure covering fuel-rich to fuel-lean equivalence ratios with temperature ranging from 773 K to 1573 K. Experimental results indicated that HCN is completely consumed in CO2 atmospheres, whereas significant amounts remain in N2 atmospheres under fuel-rich conditions. Compared with O2/N2 atmospheres, the formation of NO in O2/CO2 atmospheres is reduced by 8.85% and 5.8% under stoichiometric and fuel-lean conditions respectively, whereas it is 5.15% greater under fuel-rich conditions. A newly developed chemical kinetic mechanism based on our previous studies satisfactorily reproduced the main features of CO, HCN, and NO formation. The conversion differences of pyridine to NO between O2/CO2 and O2/N2 atmospheres are mainly due to the differences of conversion of HCN to NO. The conversion ratio discrepancies of pyridine to HCN are all less than 2%. The conversion ratios of HCN to NO in O2/N2 and O2/CO2 atmospheres are 7.2% and 15.6% under fuel-rich conditions, 65.3% and 57.4% under stoichiometric conditions, and 83.5% and 76.3% under fuel-lean conditions, respectively. |
| Databáze: | OpenAIRE |
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