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On the fate of fuel nitrogen during coal char combustion
Author(s) -
Wendt J. O. L.,
Schulze O. E.
Publication year - 1976
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690220112
Subject(s) - char , combustion , nitrogen , coal , chemistry , nitrogen oxide , fluidized bed combustion , nox , nitric oxide , chemical looping combustion , coal combustion products , chemical engineering , inorganic chemistry , organic chemistry , engineering
Abstract The physical and chemical characteristics that influence the conversion of fuel nitrogen to nitrogen oxides during coal char combustion were theoretically examined by using a simplified model in which nitric oxide is an intermediate product between fuel nitrogen and N 2 . It was found that diffusion‐reaction interactions were important in determining the selectivity of the char particle toward nitric oxide production. At low temperature fluidized bed combustion conditions, pore size is important, and low conversion of fuel nitrogen to nitric oxide is favored by long narrow pores. Under high temperature, pulverized coal combustion conditions, the model provided insight into mechanisms of nitric oxide formation and predicted the observed weak temperature dependence of fuel nitrogen conversion, as well as a significant effect of particle size.