Heat radiation measurement method for high pressure oxy-fuel combustion

Oxy - fuel combustion of coal and biomass blends

The ignition temperature, burnout and NO emissions of blends of a semi-anthracite and a high-volatile bituminous coal with 10 and 20 wt.% of olive waste were studied under oxy-fuel combustion conditions in an entrained flow reactor (EFR). The results obtained under several oxy-fuel atmospheres (21%O2-79%CO2, 30%O2-70% CO2 and 35%O265%CO2) were compared with those attained in air. The results in...

k-Distribution Methods for Radiation Calculations in High-Pressure Combustion

a = nongray stretching factor for fill-spectrum k-distribution method I = radiative intensity,W∕m sr Ib = blackbody intensity/Planck function, W∕m sr k = reordered absorption coefficients in k distribution, cm−1 L = length of one-dimensional medium, cm M = total number of groups of nth gas component N = total number of species/scales P = total pressure, bar PL = pressure path length, P × L, bar...

Determination of the Kinetic Parameters of Oxy-fuel Combustion of Coal with a High Ash Content

The aim of this study was to determine the kinetic parameters of the oxy-fuel combustion of char from a Brazilian bituminous coal with a high ash content. The char, with a particle diameter of 715 μm, was prepared in a N2 atmosphere at 1173 K. The oxy-fuel combustion assays were performed using a thermobalance at different temperatures and O2/CO2 gas mixtures of different concentrations. Accord...

Effects of nitrogen content in fuel on NOX emissions under oxy-fuel coal combustion

Oxy-fuel coal combustion with flue gas re-circulation is known to be one of the most promising methods for reducing CO2 emissions from coal combustion power plants. In the oxy-fuel system, the combustion atmosphere consists of only O2 separated from air and flue gas re-circulated from a stack. Therefore, the flue gas is dominated by CO2 without any nitrogen gas. The most attractive potential as...

Oxy-coal Combustion Studies