CAJ | 학술논문

为了研究温度对煤吸附甲烷的影响,实验测定了不同温度下煤对甲烷的吸附等温线,并对实验数据进行了拟合,同时对覆盖度与压力、温度、吸附量以及孔隙类型的关系进行了分析.结果表明:随着温度的增高,饱和吸附量和吸附速率明显降低,并且含气量与覆盖度呈正相关关系;同一压力下,随着温度升高,覆盖度降低;相对覆盖度概念可以解释高温覆盖度高而吸附量小于低温阶段的现象;结合孔隙度和液氮分析结果发现,随着温度的增高,小孔和微孔的吸附能力强于中孔和大孔;甲烷在煤上的等量吸附热随吸附量的增大而增大,但无规律可循,且由Clausius-Clapeyron 方程预测出的等温吸附曲线与实测值有偏差,表明煤表面能量的不均匀性和表面离子的复杂性.
위료연구온도대매흡부갑완적영향,실험측정료불동온도하매대갑완적흡부등온선,병대실험수거진행료의합,동시대복개도여압력、온도、흡부량이급공극류형적관계진행료분석.결과표명:수착온도적증고,포화흡부량화흡부속솔명현강저,병차함기량여복개도정정상관관계;동일압력하,수착온도승고,복개도강저;상대복개도개념가이해석고온복개도고이흡부량소우저온계단적현상;결합공극도화액담분석결과발현,수착온도적증고,소공화미공적흡부능력강우중공화대공;갑완재매상적등량흡부열수흡부량적증대이증대,단무규률가순,차유Clausius-Clapeyron 방정예측출적등온흡부곡선여실측치유편차,표명매표면능량적불균균성화표면리자적복잡성.
Using adsorption experiment we measure adsorption isotherms of coalbed methane at different tempera-tures and fit the experimental data. We discuss the coverage rate and pressure, temperature, pore types and adsorp-tion capacity. The results showed that as the temperature increases, the adsorption capacity and adsorption rate de-crease significantly, and the saturated extent of adsorption has a positive correlation with coverage rate;and as the temperature increases, coverage rate decreases under the same pressure point;the concept of the relative coverage was put forward which can be used to explain the phenomenon that the coverage is higher and the adsorption ca-pacity is less at high temperature than at low-temperature; micropore and mesopore take a leading role in the ad-sorption as the temperature increases;it does not comply with moral law that the adsorption isosteric heat increases as the adsorption capacity increases and the adsorption isotherm predicted by the Clausius-Clapeyron equation was different from the measured value, which indicates the heterogeneity of the coal surface energy and the complexity of the coal surface ions.