煤可溶烃中一种特殊的稀土元素地球化学现象——以渭北中熟煤为例  

Special appearance of REE geochemistry of soluble hydrocarbon in coal——An example of a 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,陕西西安710054

出　　处：《燃料化学学报》2009年第5期527-532,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(40872101);国家重点基础研究与发展规划(973计划;2003CB214607);陕西省科技厅自然基金(109-DK07JK332)

摘　　要：用数理统计方法研究了渭北中熟煤中稀土元素(REE)在可溶烃和无机矿物中的赋存规律。结果表明,REE在可溶烃和矿物质之间有明显的互补关系,其中,轻稀土(LREE)和重稀土(HREE)又各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。LREE随着原子序数增大,其在有机的可溶烃和无机矿物中赋存规律性减弱,而HREE随着原子序数的增大,其在可溶烃和无机矿物中赋存规律性增强。这种"互补"和同步消长的关系在可溶烃各族组分之间也存在,并对煤成烃有一定的潜在作用。这是作者以前发现的"稀土元素煤地化效应"的另一种表现形式。The REE distribution between soluble hydrocarbons and minerals in a middle rank coal from Weibei, Shaanxi province, China, was studied with statistics method. It was found that there is a clear complementary relationship of REE between the soluble hydrocarbons and minerals. Among them, LREE and HREE have different distribution characters respectively, which are determined by the change of ions radii and inner electronic configuration. For this reason, the bigger atomic number of LREE, the less regularity of LREE distribution in soluble hydrocarbons and minerals. It is opposite for HREE. The complementary correlation or synchronous growth and decline with REE, are also observed among ingredients in the soluble hydrocarbons. This may have potential effect on the coal-formed hydrocarbons. This is another expression of “geochemical effect of REE in coal” observed by the author. In addition, the “tetra-component effect” of REE geochemistry in coal has been found.

关 键 词：可溶烃 稀土的煤地化效应 稀土的离子半径 

分 类 号：TQ533[化学工程—煤化学工程]