渭北中阶煤中微量元素残留烃-无机矿物亲和性及其对煤成烃影响的研究  

Organic Residual Hydrocarbon-Inorganic Mineral Affinity of Trace Elements and Their Influence on Coal-formed Hydrocarbon

作　　者：杨建业[1] 邓军平[1] 李璐[1] 王西勃[2] 刘振[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 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《地球学报》2008年第2期235-240,共6页Acta Geoscientica Sinica

基　　金：国家973项目(编号:2006CB202201);煤炭资源与安全开采国家重点实验室项目(编号:2007-03);陕西省科技厅自然基金(编号:2004D02)资助

摘　　要：用数理统计相关分析法研究了渭北中阶煤中微量元素和残留烃的有机亲和性,提出了亲和系数的重要概念。发现微量元素在煤中有机质和矿物质中以及不同有机质之间有明显的分配规律。还阐释了渭北中阶煤中微量元素表现出不同于准噶尔低阶煤的和有机碳、S1高度关联的现象。认为这与不同成煤环境中微量元素不同的生烃催化效应有关,也与煤变质中其大分子结构中的芳香核缩合、官能团脱落以及成烃过程中微量元素在不同有机质中的重新"分配"、"迁移"有关,还与微量元素对不同成熟度的干酪根和轻重组分不同的烃类选择性富集有关。In this paper, the organic affinity of residual hydrocarbon and trace elements in mid-rank coals from the Weibei coalfield of Shaanxi Province was examined by correlation analysis, and the authors put forward the concept of affinity coefficient. The results show that the distribution of trace elements in the Weibei coalfield shows obvious regularity among organic matters, minerals and various kinds of organic components. It is also shown that the correlation between trace elements and organic carbon/S1 is relatively weak in Weibei coalfield, which is different from things of the Junggar coalfield in Xinjiang. These characteristics result form various catalytic activities of trace elements in the process of hydrcoarbon generation in different coal-formed environments, redistribution and remigration of trace elements among organic macromolecules during the condensation of aromatic compounds and abscission of function group in coal metamorphism, and selective adsorotion of trace elements for different maturities of kerogens and different compositions of hydrocarbons.

关 键 词：亲和系数 微量元素 煤成烃 

分 类 号：P618.11[天文地球—矿床学]