含瓦斯型煤吸附/解吸特性研究

Study on Adsorption and Desorption Characteristics of Briquette Coal Containing Gas

为解决煤层瓦斯含量测定不准的问题,采用型煤对其不同温度下的吸附/解吸特性进行测试研究。研究结果表明:随着温度的降低,型煤的吸附常数a、b值迅速增大;同一温度下,型煤的解吸量随着时间的增大而逐渐增加,吸附平衡压力越大,其解吸量越大;型煤的解吸量Q与时间t、温度T及压力p满足Q=((Cp+D)T+ep+f)t^((hp+g)T+mp+n)的关系,式中:C、D、e、f、h、g、m均为拟合参数。

In order to solve the problem of inaccurate determination of coal seam gas content, the adsorption and desorption characteristics of briquette coal at different temperature were studied. The results showed that the adsorption constants which are a and b increase rapidly with the decrease of temperature. Under the same temperature, the desorption amount of briquette coal increases with the increasing of time. The high of the adsorption equilibrium pressure is, the greater the desorption amount of briquette coal is. The relationship among desorption amount Q of briquette coal and time t, temperature T and pressure p meets the function of Q=（（Cp＋D）T＋ep＋f）t-（（hp＋g）T＋mp＋n）, and C, D, e, f, h, g, m are fitting constants.