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International Journal of Energy for a Clean Environment
SJR: 0.151 SNIP: 0.224 CiteScore™: 0.21

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v6.i1.70
pages 83-97

NOx EMISSIONS AND COMBUSTIBILITY CHARACTERISTICS OF COAL BLENDS

F. Rubiera
Instituto Nacional del Carbón (CSIC), Apartado 73, 33080 Oviedo, Spain
A. Arenillas
Instituto Nacional del Carbón (CSIC), Apartado 73, 33080 Oviedo, Spain
B. Arias
Instituto Nacional del Carbon, CSIC, Apartado 73, 33080 Oviedo, Spain
J. J. Pis
Instituto Nacional del Carbón (CSIC), Apartado 73, 33080 Oviedo, Spain

ABSTRACT

A series of coals were blended and several aspects of the resultant blends were studied. This included determination of the grindability of the samples by means of the Hardgrove Grindability Index and temperature programmed combustion tests, which were carried out in a thermogravimetric analyzer coupled to a quadrupole mass spectrometer. Special attention was paid to the combustibility parameters and the NO emissions during blend combustion. It was found that while some coal blends present interaction between the individual coals, others do not. This behavior was assumed to be due to the differences in coal structure and functional groups composition.