Alejandro Molina

TL;DR: In this paper, the effect of enhanced oxygen levels and CO 2 bath gas is independently analyzed for their influence on single-particle pulverized coal ignition of a U.S. eastern bituminous coal.

TL;DR: In this article, the results of pilot-scale tests of oxy-fuel combustion and to accurately predict scale-up performance through CFD modeling were analyzed in detail through single-particle imaging at a gas temperature of 1700 K over a range of 12-36 vol % O 2 in both N 2 and CO 2 diluent gases.

TL;DR: In this article, a description of the main parameters affecting char gasification, as well as an evaluation of the kinetic models used for describing the gasification reaction, are presented, and it is shown that the thermal history of the char, the pore structure and the coal chemical composition are those which present the most different results.

TL;DR: In this article, the authors investigated the effect of gasification reactions of coal char on the char burning rate and found that coal char particle temperature decreases with increasing O2 concentration and particle size.

TL;DR: The contribution of nitrogen present in the char on the production of nitrogen oxides during char combustion was analyzed in this article, focusing on the functionalities in which nitrogen is present in coal and how they evolve during coal devolatilization, the mechanism of nitrogen release from the char to the homogeneous phase and its further oxidation to NO, and reduction of NO on the surface of the char.