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Combustion and air emissions from co‐firing a wood biomass, a Canadian peat and a Canadian lignite coal in a bubbling fluidised bed combustor
Author(s) -
Badour Chadi,
Gilbert Allan,
Xu Charles,
Li Hanning,
Shao Yuanyuan,
Tourigny Guy,
Preto Fernando
Publication year - 2012
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20620
Subject(s) - peat , combustion , combustor , coal , environmental science , waste management , biomass (ecology) , coal combustion products , moisture , water content , oxy fuel , environmental chemistry , chemistry , environmental engineering , pulp and paper industry , geology , engineering , biology , ecology , oceanography , geotechnical engineering , organic chemistry
The effects of particle size, fuel blending ratio, moisture content and excess air ratio on combustion efficiency and air emissions (CO 2 , CO, SO 2 and NO x ) from the co‐combustion of white pine or peat with a Canadian lignite coal, were examined in a pilot‐scale bubbling fluidised bed combustor. Pelletising was important for the efficient combustion of wood due to its high volatile content. Co‐firing lignite and pine pellets gave a proportional reduction in SO 2 and NO x emissions with blending ratio, while co‐firing of peat and lignite resulted in increased SO 2 emissions, but decreased NO x emissions. Moisture promotes combustion but with increased CO emissions, and results in increased NO x emissions, and decreased SO 2 emissions. High excess air decreased CO, but moderately increased SO 2 and NO x emissions. © 2011 Canadian Society for Chemical Engineering