János M. Beér
Current Research

The combustion process is modified to reduce or eliminate the emissions of toxic combustion products. Design principles are developed for low NOx burners using gaseous, liquid and solid fuels by detailed modeling of the thermodynamics and chemical kinetics of nitrogen oxides formation and destruction in hydrocarbon/air flames, and by the use of fluid dynamics of turbulent reacting flows for controlling the mixing of the fuel and oxidant in the flame.

In pulverized coal combustion the transformation of the coal mineral matter in the flame is followed by modeling to determine the propensity of the coal ash to form deposit on heating surfaces in boiler plant. Computer controlled scanning electron microscopy is used to examine the distributions of the mineral matter size and chemical species concentrations in the coal. Models of the combustion process of the coal particle and of the paths of fly ash particles near heat exchange tubes are then used to determine the probability of their impaction on the tube and their retention in the formed deposit.

Progress is also being made in development of low emission combustion technologies compatible with high thermodynamic efficiency advanced electric power generation cycles.

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