本文選題：構(gòu)造煤 + 原生結(jié)構(gòu)煤　； 參考：《采礦與安全工程學(xué)報》2017年01期

【摘要】：以黔西北青龍煤礦和小屯煤礦的構(gòu)造煤和原生結(jié)構(gòu)煤為研究對象,利用全自動氮吸附儀分別測得煤樣的液氮等溫吸解曲線。根據(jù)BJH法分別繪制了煤樣的孔徑分布圖,對比了構(gòu)造煤和原生結(jié)構(gòu)煤孔隙結(jié)構(gòu)對吸解特性的影響。結(jié)果表明:構(gòu)造煤的BET比表面積、孔容均大于原生結(jié)構(gòu)煤,構(gòu)造煤的孔直徑小于原生結(jié)構(gòu)煤;在相同壓力條件下,構(gòu)造煤的解吸量與吸附量之差明顯大于原生結(jié)構(gòu)煤;構(gòu)造煤的解吸量和解吸速度均大于原生結(jié)構(gòu)煤;構(gòu)造煤和原生結(jié)構(gòu)煤的等溫吸附線均具有Ⅱ類等溫吸附線的特征;在相對壓力約為0.4~0.5時,構(gòu)造煤與原生結(jié)構(gòu)煤解吸曲線均出現(xiàn)一個較大的拐點(diǎn);構(gòu)造煤與原生結(jié)構(gòu)煤吸附與解吸均出現(xiàn)"滯后"現(xiàn)象,且構(gòu)造煤脫附時很難達(dá)到吸附起始點(diǎn),構(gòu)造煤比原生結(jié)構(gòu)煤存在更多"墨水瓶"型微孔;構(gòu)造煤的微孔主要集中在2~3nm左右,原生結(jié)構(gòu)煤的微孔主要集中在4 nm左右;黔西北煤的解吸空間主要集中在大于3~4 nm的微孔孔隙。
[Abstract]:The isothermal absorption and desorption curves of liquid nitrogen of coal samples from Azure Dragon and Xiaotun coal mines in northwest Guizhou Province were measured by using automatic nitrogen adsorption instrument. According to the BJH method, the pore size distribution maps of coal samples were drawn, and the influence of pore structure of tectonic coal and primary structure coal on the absorption characteristics was compared. The results show that the BET specific surface area and pore volume of tectonic coal are larger than that of primary structure coal, and the pore diameter of tectonic coal is smaller than that of primary structure coal, and the difference between desorption capacity and adsorption capacity of tectonic coal is obviously larger than that of primary structure coal under the same pressure. The desorption capacity and desorption rate of tectonic coal are higher than that of primary structure coal, the isothermal adsorption lines of tectonic coal and primary structure coal have the characteristics of class 鈪，

本文編號：2017673