1. Study on Radiation Property of Coal Char Particle Cloud

Abstract

The thermal radiation properties are studied for a cloud of coal char in coal gasification processes. The monochromatic absorption of the sample particles dispersed in liquid paraffin wax is measured spectroscopically at an atmospheric state by using FT-IR The spectra of absorption are expressed in the property of the extinction efficiency in the wavelength of 0.7 to 2.2μm. The char spectra of the extinction efficiency are almost flat over the wavelength. As the carbon content in char decreases, the spectra of extinction efficiency falls gradually. Larger particle size of char shows apparently greater extinction efficiency in the present range of the size.