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Effect of Operating Conditions on NO x and CO Emissions in a Pilot‐Scale Vortexing Fluidized‐Bed Combustor with Flue Gas Recirculation
Author(s) -
Qian F.,
Chyang C.,
Yeh C.,
Tso J.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201200146
Subject(s) - flue gas , combustor , chemistry , combustion , nox , fluidized bed combustion , char , fluidized bed , stoichiometry , oxygen , nitrogen , analytical chemistry (journal) , nitrogen oxide , waste management , environmental chemistry , organic chemistry , engineering
In order to study the effect of flue gas recirculation (FGR) by primary air mixed with FGR or nitrogen on NO x emissions in a fixed total primary air flow rate, the bed temperature, stoichiometric oxygen ratio in the combustion chamber, and excess oxygen ratio were investigated in a pilot‐scale vortexing fluidized‐bed combustor (VFBC). As a result, the NO x emissions could effectively be decreased with FGR in the VFBC. The lower NO x emissions were attributed to the fact that the FGR allows NO x to enter the reactor again with the chance of being reduced and that the FGR contains more CO 2 to suppress NO x formation or promote NO x reduction through its conversion to CO by reaction with char.