煤吸附瓦斯过程温度变化的试验研究

Experimental Study on Change in Coal Temperature During Adsorbing Gas

在实验室对不同瓦斯(CO2，CH4，N2等)吸附过程中煤体温度的变化进行了研究，证实煤体吸附瓦斯的过程是放热过程；煤体吸附不同的瓦斯时，放出的热量不同：吸附CO2时最大，CH4次之，N2最小；煤对其吸附能力越强的瓦斯，吸附时放出的热量越大.对于同一种瓦斯，吸附的瓦斯压力越大，即瓦斯吸附量越大，吸附过程放出的热量越大.

Experiment on change in coal temperature during the process of adsorbing different gases (CO2, CH4 and N2 ) was carried out in lab . The result shows that the process is a heat releasing one, during which the released heat quantity varies from large to small in the order of CO 2, CH4, and N2. Consequently, for different gases, the str onger the capacity of coal adsorption is, the larger the released heat quantity durin g the process of adsorption is. For the same gas, the greater the gas pressure f or adsorption (i.e. the adsorbed quantity of gas) is, the larger the released he at quantity during the process of adsorption is.