A simplified simulation of the reaction mechanism of NOx formation and non-catalytic reduction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F18%3A43915481" target="_blank" >RIV/60461373:22320/18:43915481 - isvavai.cz</a>
Result on the web
<a href="https://www.tandfonline.com/doi/pdf/10.1080/00102202.2017.1418335?needAccess=true" target="_blank" >https://www.tandfonline.com/doi/pdf/10.1080/00102202.2017.1418335?needAccess=true</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/00102202.2017.1418335" target="_blank" >10.1080/00102202.2017.1418335</a>
Alternative languages
Result language
angličtina
Original language name
A simplified simulation of the reaction mechanism of NOx formation and non-catalytic reduction
Original language description
During fossil fuel combustion, pollutants, such as NOx, SO2, CO, CO2, organic compounds and fly ash are produced. Taking into consideration that emission limits have been becoming stricter it is crucial to apply technologies that reduce pollutant formation. This work focuses on NOx formation and its consequent emission reduction via SNCR technology. A mathematical model based on the kinetic description of NOx production and its non-catalytic reduction for a boiler operating under specified conditions was developed. A large number of chemical reactions take place during NOx formation and reduction inside the boiler reduction zone. In this paper various important reactions that have significant influence on the SNCR process were selected. Based on the selected reactions a simplified SNCR reaction mechanism was assembled and converted into a numerical model. The model was applied for a denitrification process taking place in the temperature range 850–1050°C. Urea was used as reducing agent. Input gas contained NO in the order of 10–5 molar fraction. Other components of input gas were 6.6 mole% water vapour, 13 mole% CO2, 4 mole% O2, 0.3 mole% CO, 0.05 mole% H2 and the balance being N2. Residence time was 0–2 s. The developed model makes possible to define the reducing zone in different types of boiler while using various reducing agents as well as to predict the degree of denitrification. As a result it is possible to optimize SNCR for any given boiler. The results obtained from model calculations demonstrated that the developed reaction mechanism of NOx formation and non-catalytic reduction can be applied.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Combustion Science and Technology
ISSN
0010-2202
e-ISSN
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Volume of the periodical
190
Issue of the periodical within the volume
FEB
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
967-982
UT code for WoS article
000428046900002
EID of the result in the Scopus database
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