Geochemical Characteristics of Steranes of Coal Generated Hydrocarbons: A Case of High Temperature and Fined Simulated Experiment
详细信息
- 责任者：Sun Tao (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Duan Yi
- 刊名：Natural Gas Geoscience
- 出版年：2011
- 卷期：22(6)
- 关键词：煤成气 ; coal-formed gas ; 生烃作用 ; hydrocarbon generation ; 热模拟 ; thermal simulation
- 页码：p.1082-1087
- 图表：8 illus., 1 table, 22 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Peat and coal are selected to do simulation experiment in order to understand characteristics of hydrocarbon generation from coal.According to GC-MS analysis for soluble organic matters extracted from simulated products of peat and coal in closed system pyrolysis,the abundance of steranes in the saturated hydrocarbon fractions with the maximum intensities of C29-regular steranes is observed,reflecting that the terrestrial higher plants are main parent materials.The relative content of C29-regular steranes decreases with simulated temperature increase,and become little variation,suggesting that the thermal maturity should be considered when the relative content of regular steranes is used to identify source material.C29 sterane-20S/(20S+20R) and C29 sterane-C29ββ/(ββ+αα) is a selected parameter for identifying the mature or immature organic matter.∑diasteranes/∑regular-sterane is also a maturity parameter.The experimental results show that the simulation curve of peat and coal is different at low mature stage,and become similar at high mature stage.So,it is meaningful to understand the hydrocarbon generation from peat to coal by contrast simulated experiment.