镧系元素的煤地化效应--以渭北中熟煤为例  

Effect on Coal-Geochemistry of Lanthanide Elements——An Example of Middle Rank Coal from Weibei

作　　者：杨建业[1] 

机构地区：[1]西安科技大学材料科学与工程系

出　　处：《中国稀土学报》2008年第4期486-490,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家973项目(2003CB214607);煤炭资源与安全开采国家重点实验室资助项目(2007-003);陕西省科技厅自然基金(2004D02)资助项目

摘　　要：用数理统计的方法研究了渭北中熟煤中REE在残留烃-无机矿物的赋存规律,发现REE在煤中热解残留烃和矿物质之间有明显的分配规律。其中LREE和HREE又各自呈现出不同的分布和赋存特征。但无论是LREE还是HREE,这种赋存分布规律都决定于其离子半径及内部的电子构型变化规律。因而出现LREE随着原子序数增大,其在有机的残留烃中赋存规律性增强,而HREE随着原子序数的增大,其在无机矿物中赋存规律性增强的现象。这就是本研究所发现的"镧系元素的煤地化效应"。The occurrences of lanthanide element in residual hydrocarbon and inorganic minerals in middle rank coal were studied by statistical analysis from Weibei coalfield, Shaanxi Province. The results showed that the occurrences of REE in residual hydrocarbon and inorganic minerals were different, and the distribution and occurrence of LREE and HREE were dissimilar. It was found that REE with bigger atomic number trended to occur in residual hydrocarbon, whereas HREE with bigger atomic number were prone to present in inorganic minerals. This might indicate that the occurrence of lanthanide element was dominated by its ionic radius and electronic configuration.

关 键 词：镧系元素 煤地化效应 离子半径 稀土 

分 类 号：O614.33[理学—无机化学]