煤中小分子的微孔嵌入特征与溶出特性  

Characteristics of Micropore-Inbuilt Form of Micromolecules in Coal and Their Solubilization Rules

作　　者：秦志宏[1] 侯翠利 张迪[1] 丁曙光[1] 孙昊[1] 江春[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2007年第5期586-591,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50474066);教育部科学技术研究重点项目(107055);煤炭加工与高效洁净利用教育部重点实验室开放基金项目(CPEUKF06-03)

摘　　要：以CS2为溶剂对童亭暗煤进行了按时间段分次取样的溶剂萃取,采用GC/MS对各次萃取物进行了定性分析,并与童亭亮煤和童亭丝炭的分析进行了比较.结果表明:童亭暗煤中部分化合物溶出时刻具有较高的选择性,即较大微孔中的分子量大的化合物首先溶出,而较小微孔中的分子量小的化合物后期溶出,极性化合物溶出时刻既受微孔大小也受极性强弱影响,但一般是延迟溶出;以细粒分散于有机质基质中的矿物质对游离态化合物的溶出有延迟作用;显微亚组分的不同将决定微孔嵌入态小分子的组成和数目分布,结构镜质体孔隙多较大,不利于对小分子的吸附嵌入,但可有游离态小分子装填;无结构镜质体孔隙多呈微孔分布,对小分子的嵌入较有利;当以微孔嵌入态存在时,长链烷烃溶出顺序总体上是高碳烷烃→中碳烷烃→低碳烷烃.Durain from Tongting bituminous coal was fractionally extracted with CS2 and sampled in batches with time intervals. Extracts obtained were qualitatively analyzed with GC/ MS, and then compared with that of clarain and fusain from Tongting bituminous coal. The resuits show that, some compounds in durain are released with strict selective time, i.e. compounds of macro-molecular weight in bigger micropores release in the first stage, compounds of micromolecular weight in smaller micropores release in the last stage, the release of polar compounds is affected by the size of micropores and the intensity of polarity, but it postponed commonly. Mineral matter in granule dispersed in organic matrix of coal can postpone the release of compounds in the form of free state. The difference of sub-maceral can affect the components and number of small molecules in micropore-inbuilt state. Telinite with big pores can＇t easily absorb the micro-molecules, but micromolecules in the state of free form can be filled in it easily. Collinite with micropores can easily absorb micromolecules. Exist in the micropore-inbuilt state, long-chain alkanes will release in the order of high-carbon alkanes, middle-carbon alkanes, low-carbon alkanes as a whole.

关 键 词：暗煤 萃取 分次取样 CS2 

分 类 号：TQ530[化学工程—煤化学工程] TQ531.5