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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Centrum výzkumu nízkouhlíkových energetických technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL

ISSN

1750-5836

e-ISSN

1878-0148

Svazek periodika

76

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

208-214

Kód UT WoS článku

000441086100020

EID výsledku v databázi Scopus

2-s2.0-85050346894