期刊
FUEL
卷 242, 期 -, 页码 232-242出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.01.025
关键词
Maceral separation; Lithotypes; Sink-float method; Pyrolysis-GC-MS; Victorian brown coal
资金
- Monash University, Australia
- China Scholarship Council, P.R. China [201706880005]
Four selectively mined lithotypes and a run-of-mine coal (ROM) have been obtained from the Yallourn coal seam in the La Trobe Valley, Victoria, Australia and a partial maceral separation of each of them has been carried out using the sink-float method with centrifugal force on a laboratory scale. The yields of liptinite-rich float fractions were between 22.5 and 2.8 wt% in the order of Pale > Light > Med-light ROM > Dark. Elemental analysis and FTIR showed that the liptinite-rich float fractions had higher H/C ratios and aliphaticities than the corresponding vitrinite-rich sink fractions and this was confirmed by solid state C-13 NMR. Pyrolysis-GC-MS using a pyrolysis temperature of 650 degrees C showed little difference in the distribution of aliphatic peaks but dramatic changes in the relative abundance of triterpenoids between lithotypes and in some cases between float and sink fractions of a lithotype. Variations in yields with pyrolysis temperature suggested that the triterpenoids are loosely bound to the main coal structure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据