脱水褐煤复吸特性及孔结构对复吸影响研究  

Study on Re-adsorption Features and Porous Structure of Dewatered Lignite Affected to Re-adsorption

作　　者：武建军[1] 李慧蓉[1] 周国莉[1] 商玉坤[1] 蔡志丹[1] 王伟[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《煤炭工程》2012年第12期102-104,共3页Coal Engineering

基　　金：国家自然科学基金资助项目(51104159);国家重点基础研究发展计划项目(2012CB214902)

摘　　要：对蒙东白音华褐煤进行不同温度热空气干燥后,考察了不同温度脱水褐煤的复吸情况,利用低温氮吸附法测定脱水褐煤的孔结构性质变化对脱水褐煤复吸的影响,并对复吸曲线进行NFLS拟合。结果表明:随着脱水温度的升高,相同复吸条件下脱水褐煤平衡复吸水分增量增加;孔容和比表面积增大,脱水褐煤复吸能力增强;复吸曲线拟合符合ExpAssoc模型。After the lignite from Baiyinhua of Inner Mongolia dried under different temperature hot air, the re - adsorption conditions of the dewatering lignite with different temperature were investigated. A low temperature nitrogen adsorption method was applied to measure the porous structure property variation of the dewatered lignite affected to the re - adsorption of the dewatered lignite and to the NFLS fitting of the re - adsorption curve. The results showed that with dewatering temperature increased, the equilibrium re - adsorption moisture content of the dewatered lignite would be increased under the same re - adsorption condition. With the pore volume and specific surface area increased, the re - adsorption capacity of the dewatered lignite would be increased. The re - adsorption curve could fit and meet with ExpAssoc model.

关 键 词：脱水褐煤 复吸 孔结构 ExpAssoc模型 

分 类 号：TQ536.1[化学工程—煤化学工程]