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为了研究煤吸附甲烷能力对温度压力变化的响应特性,选用平顶山己15-17煤层煤样,进行了-20、-10、0、10、20℃条件下高压等温吸附试验,并运用MATLAB软件对试验数据进行了分析。结果表明:特定温度下煤对甲烷的吸附量随着压力的增大而增大,当压力增大到某一特定值,吸附量趋于稳定;如果压力从0 MPa逐渐上升到8 MPa,同时温度从-20℃逐渐上升到20℃的过程中,在压力上升至6.3 MPa之前,压力对吸附量的影响起主导作用。当压力大于6.3 MPa时,温度对吸附量的影响起主导作用;在温度与压力综合影响吸附量的同时,压力制约温度对吸附量的影响效果,温度制约压力对吸附量的影响效果。
In order to study the response of coal adsorption capacity to temperature and pressure, coal samples from Pingdingshan 15-17 coal seam were selected and high pressure isothermal adsorption experiments were carried out at -20, -10, 0, 10 and 20 ℃, and MATLAB software was used The experimental data were analyzed. The results show that the amount of methane adsorbed by coal increases with the increase of pressure at a specific temperature. When the pressure increases to a certain value, the adsorption capacity tends to be stable. If the pressure gradually increases from 0 MPa to 8 MPa, During the gradual increase of the temperature from -20 ℃ to 20 ℃, the influence of pressure on the adsorption capacity was dominant before the pressure rose to 6.3 MPa. When the pressure is more than 6.3 MPa, the influence of temperature on the amount of adsorption plays a leading role. When the temperature and pressure affect the amount of adsorption, the effect of pressure control temperature on the amount of adsorption, the effect of temperature control pressure on the amount of adsorption.