The Shape of Pulverized Bituminous Vitrinite Coal Particles

Determination of radiative properties of pulverized coal particles from experiments

A detailed experimental-theoretical procedure is introduced to determine the effective radiative properties of pulverized coal particles. A CO, laser nephelometer system was used to measure the scattered intensity distributions around a downflow of pulverized coal particles. A semi-analytical inverse radiation analysis was used to determine the ‘effective’ scattering phase function of particles...

Computational Modeling of CO/CO2 Ratio Inside Single Char Particles during Pulverized Coal Combustion

A recently developed model was used to study the CO/CO2 ratio inside a burning pulverized coal particle, to better understand the effect of bulk gas composition on the equilibrium partial pressure of reduced metal species at the surface of ash inclusions. The motivation was to improve the ability to model submicrometer particle formation by ash vaporization, as a function of furnace conditions....

Formation of Inorganic Submicron Particles under Simulated Pulverized Coal Combustion Conditions

Formation characteristics of aerosol particles from pulverized coal pyrolysis in high-temperature environments.

The formation characteristics of aerosol particles from pulverized coal pyrolysis in high temperatures are studied experimentally. By conducting a drop-tube furnace, fuel pyrolysis processes in industrial furnaces are simulated in which three different reaction temperatures of 1000, 1200, and 1400 degrees C are considered. Experimental observations indicate that when the reaction temperature is...

Modeling Soot Derived from Pulverized Coal

A semiempirical model has been developed for predicting coal-derived soot. The main feature of the model is a transport equation for soot mass fraction. Tar prediction options include either an empirical or a transport equation approach, which directly impacts the source term for soot formation. Also, the number of soot particles per unit mass of gas may be calculated using either a transport e...