Abstract
Publisher Summary This chapter discusses the changes in the forms of nitrogen and oxygen during coal combustion. Fuel nitrogen is the major source of nitrogen oxide pollution. Nitrogen is located within the nitrogen macromolecule as pyridinic and pyrrolic structures with some amines forms. With the use of X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge spectroscopy (XANES), the pyridinic and pyrrolic forms of nitrogen are confirmed. The chars used are produced at low heating rates and temperatures and may not be applicable to the high heating rates and temperatures encountered in commercial pulverized coal furnaces. At high heating rates and temperatures, nitrogen release during pyrolysis is a function of coal rank. Large differences in the nitrogen volatiles occur over a range of coal rank and among coals of the same rank.
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