NOX formation in oxy-fuel combustion of lignite in a bubbling fluidized bed - Modelling and experimental verification

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00324599" target="_blank" >RIV/68407700:21220/18:00324599 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijggc.2018.07.007" target="_blank" >http://dx.doi.org/10.1016/j.ijggc.2018.07.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijggc.2018.07.007" target="_blank" >10.1016/j.ijggc.2018.07.007</a>

Result language
angličtina
Original language name
NOX formation in oxy-fuel combustion of lignite in a bubbling fluidized bed - Modelling and experimental verification
Original language description
This paper reports results of experimental and numerical studies of NOx formation in a 30 kW(th) lab-scale bubbling fluidized bed running in oxy-fuel mode. The numerical model is based on the GRI-mech 3.0 mechanism to compute the kinetics of homogeneous reactions of volatiles and char combustion products and takes into account the flue gas recirculation. The impact of the oxygen excess and of the fluidized bed temperature was examined. Both the numerical simulations and the experiments shown a significant correlation of NOX formation with the excess of oxygen, where a higher oxygen concentration enhances the fuel-bound nitrogen oxidation to NOX. It was also found that there is no correlation of the NOx formation and resulting emissions with the fluidized bed temperature in temperature range typical for bubbling fluidized bed combustors (840-960 degrees C), but the numerical simulations showed an increased NOX concentration when the temperature raised more (up to 1360 degrees C). The agreement of experimental and numerical results shows that the numerical model can provide useful insight into the mechanism of NOX formation.
Czech name
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Czech description
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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
20704 - Energy and fuels

Project
<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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