Recently

Zhundong coal with gaint reserves has been proved in Zhundong coalfield. The oxy-fuel combustion technology is considered to be one of the most promising CO2 capture technologies. Therefore

the study of oxy-fuel combustion technology for Zhundong coal has an important significance on the large-scale

highly efficient

clean and safe use of Chinese coal. However

at present the influence of O2/CO2 atmosphere on the melting behavior and microscopic physicochemical properties of Zhungdong coal ash was barely reported. Thus

some research were carried out on the Zhundong coal including measuring the ash fusion temperatures with an ash melting point devise in controlled atmosphere

and analyzing the microscopic physicochemical properties using an analytical scanning electron microscope matched with an energy dispersive spectrometer. The experimental results showed that the influence of the change among air atmosphere

CO2 atmosphere and O2/CO2 atmosphere upon the melting temperature of Zhundong coal ash can be negligible

but the change did give definitive effect on the microscopic physicochemical properties to some extent. Oxy-fuel atmosphere mainly affected the distribution of Ba

Na and Ca elements on the surface of ash

while O2 content was the primary factor of the micro-morphology of Zhundong coal ash.