Adsorptive Capacity of Coals and Its Affecting Factors
Adsorptive Capacity of Coals and Its Affecting Factors
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发表时间：
2004
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通讯作者：
Zhong Ling-wen
中科院分区：
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作者：
Zhong Ling-wen
为了研究煤的储气量，对124个煤样进行了一系列的试验。这些测试包括：等温吸附试验、煤岩分析、工业分析、压汞试验和低温液氮试验。研究表明：（1）煤的变质作用控制着煤的吸附能力。当R_（max）从0.3%增加到4.25%时，Langmuir体积从11.25增加到47.16 cm~3/g。(2)平衡水分处理煤的容煤率与煤的镜质组含量呈正相关，与惰质组含量呈负相关，与孔隙比表面积、孔隙体积、孔隙比表面积、孔隙体积呈正相关。(3)水分和温度对煤的吸附能力有相反的影响。不同变质阶段煤的吸附曲线变化趋势不同。气煤的吸附量随温度和压力的升高而增大，表明压力起主导作用。当温度低于60 ℃，压力低于15 MPa时，无烟煤的吸附量随温度和压力的升高而增大，也表明压力起主导作用。当温度高于60 ℃、压力高于15 MPa时，无烟煤的吸附能力降低，温度的影响大于压力的影响。
In order to research on the gas storage capacity of coal, a series of tests were carried out using 124 coal samples. These tests include: isothermal adsorption test, coal petrography analysis, proximate analysis, mercury intrusion test and cryogenic liquid nitrogen test. The research shows: (1) Coal metamorphism controls the adsorptive capacity. As R_(max) increases from 0.3% to 4.25%, the volume of Langmuir increases from 11.25 to 47.16 cm~3/g. (2) The capacity rate of the coal processed with equilibrium moisture has a normal correlation to the vitrinite content and an inverse correlation to the inertinite content of the coal, and displays a normal correlation to the specific surface areas of pore and micropore, and micropore volume. (3) The moisture and temperature have inverse influence on coal adsorptive capacity. Coals at different metamorphic stages have different variation tendency of adsorption curves. The adsorptive capacity of gas coal increases with temperature and pressure, indicating the dominant role of pressure. The adsorptive capacity of anthracite increases with increasing temperature and pressure when the temperature is lower than 60 ℃ and the pressure lower than 15 MPa, which also indicates the dominant role of pressure. When the temperature is over 60 ℃ and the pressure higher than 15 MPa, the adsorptive capacity of the anthracite decreases, suggesting that the influence of temperature is stronger than that of pressure.