低渗煤中N_(2)吸附模型适用性分析  

Applicability Analysis of N_(2) Adsorption Model in Low Permeability Coal

作　　者：杨靖浩 刘会虎[1] 张琨 薛生 徐宏杰[1] YANG Jinghao;LIU Huihu;ZHANG Kun;XUE Sheng;XU Hongjie(School of Earth and Environment,Anhui University of Science and Technology,Huainan,Anhui 232001;Energy Research Institute of Hefei Comprehensive National Science Center(Anhui Energy Laboratory),Hefei,Anhui 230031)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]合肥综合性国家科学中心能源研究院(安徽省能源实验室),安徽合肥230031

出　　处：《中国煤炭地质》2023年第9期27-32,共6页Coal Geology of China

基　　金：国家自然科学基金项目(42277483);能源研究院合肥综合性国家科学中心项目(21KZS218);2023年安徽省重大基础研究资助项目(2023z04020001);安徽省自然科学基金项目(2008085MD121,2108085MD134);安徽理工大学2022研究生创新基金项目(2022CX2004)。

摘　　要：以中国两淮煤田低渗含煤区刘庄矿13煤和祁东矿7煤为研究对象,开展了N_(2)等温吸附试验。以回归系数平方、标准差和相对误差三种指标综合分析了Langmuir模型(简称L模型)、Toth模型(简称T模型)、Dubinin-Astakhov(简称D-A模型)、Dubinin-Radushkevich模型(简称D-R模型)、Optimize Langmuir模型(简称优化L模型)、Optimize Toth模型(简称优化T模型)、Optimize Dubinin-Astakhov模型(简称优化D-A模型)、Optimize Dubinin-Radushkevich模型(简称优化D-R模型),共8种模型对低渗煤中N_(2)吸附曲线的适用性。结果表明:两组煤样中N_(2)吸附都符合经典IUPAC等温吸附分类标准中的第Ⅰ型等温吸附曲线;8种模型对低渗煤中N_(2)吸附的拟合精度由高到低依次为优化T模型>T模型>优化L模型>优化D-A模型>优化D-R模型>D-A模型>L模型>D-R模型。N_(2) isothermal adsorption experiments were carried out for No.13 coal from Liuzhuang Mine and No.7 coal from Qidong Mine in the low permeability coal-bearing areas of Huaihua-huaibei coal fields in China.The Langmuir model(referred to as the L model),the Toth model(referred to as the T model),the Dubinin-Astakhov model(referred to as the D-A model),the Dubinin-Radushkevich model(referred to as the D-R model),the Optimize Langmuir model(referred to as the Optimize L model),Optimize Toth model(referred to as the Optimize T model),Optimize Dubinin-Astakhov model(referred to as the Optimize D-A model),Optimize Dubinin Radushkevich model(referred to as the Optimize D-R model),which applicability of 8 models for N_(2) adsorption curves in low permeability coal was comprehensively analyzed by regression coefficient square,standard deviation,and relative error.The results were showed that the N_(2) adsorption in the two groups of coal samples conform to the type I isothermal adsorption curve in the classic IUPAC isothermal adsorption classification standard;the fitting accuracy of 8 models for N_(2) adsorption in low permeability coal from high to low show as follows:Optimised T model>T model>Optimised L model>Optimised D-A model>Optimised D-R model>D A model>L model>D-R model.

关 键 词：吸附模型 氮气 低渗煤 两淮煤田 

分 类 号：TD712[矿业工程—矿井通风与安全]