@article{oai:repo.lib.tut.ac.jp:00001110, author = {OKAZAKI, Ken and SUGIYAMA, Kazuo and YURI, Isao}, issue = {4}, journal = {JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties, JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties}, month = {Nov}, note = {The effects of various basic factors of combustion conditions and coal properties on thermal NO_x formation behaviors in pulverized coal combustion have been experimentally clarified, and a theoretical analysis for the flame structural change around a coal particle has been performed, including full chemical kinetics of prompt NO_x formation. Thermal NO_x concentrations much higher than those predicted by the extended Zeldovich mechanism have been experimentally observed even in the usual pulverized coal combustion conditions. The contribution of thermal NO_x to the total NO_x rapidly increases with the increase of flame temperature and oxygen-fuel stoichiometric ratio, especially for highly volatile coals. Both the large amount of thermal NO_x formation and the effects of various factors on it have been well explained by considering the prompt NO_x formation in the flame zone around each coal particle through HCN and NH formed by the reactions between N_2 in air and hydrocarbons in the evoluted volatile matter., ・rights:日本機械学会 ・rights:本文データは学協会の許諾に基づきCiNiiから複製したものである ・relation:isVersionOf:http://ci.nii.ac.jp/naid/110002493430/}, pages = {533--539}, title = {Formation Mechanism of Thermal NO_x in Pulverized Coal Combustion}, volume = {34}, year = {1991} }