STUDY ON THE GAS GENERATING ABILITY OF COAL IN DIFFERENT SYSTEMS
煤在2种不同体系的生气能力研究

In this paper, the authors simulated the gas generating ability of coal in semi-opened and closed systems. The results show that there is a great difference in the gas generating process of coal in the two systems. The temperatures at which coal begins to generate gas and the gas-generating peak appears in the semi-opened system are higher than those in the closed system. The generated gas amount in the semi-opened system is less than that in the closed system at the same temperature, one reason for this is that the heavy hydrocarbons can be expelled out in the semi-opened system and can not be cracked into methane at high temperatures. The pressure can be an advantage for gas generation. The opening degree of a system has a great influence on the gas generation ability of coal.