Name : The 51st Conference of Coal Science
Number : 51
Location : [in Japanese]
Date : October 22, 2014 - October 23, 2014
The purpose of this study was to examine devolatilization behavior of coals under high temperature combustion conditions and to evaluate the effect of swelling property on combustion characteristics. For this purpose, a swelling coal (bituminous coal) and two non-swelling coals (bituminous and sub-bituminous coals) have been burned in a quartz glass tube reactor with a single particle temperature measurement system. Images of burning particles were obtained using a two-color pyrometer mounted at a high-speed camera and analyzed. Analysis results showed that devolatilization behavior in the single particle level differed among the tested coals. In case of the swelling coal, devolatilization occurred locally through pores on the particle surface and the transition from devolatilization to char combustion took longer time compared to the cases of 2 non-swelling coals. This paper discusses burn-out characteristics of coals in relation to swelling characteristics on theses findings.
