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Composition and adsorptivity of shales in coal-bearing rock strata of Huainan coalfield
Received date: 2014-02-20
Revised date: 2014-03-25
Online published: 2015-01-15
Based on qualitative and quantitative analyses of organic and mineral in shales, the composition geological characteristics and adsorptivity of shales in coal-bearing strata were systematically studied in Huainan mining area. Results are given below, 1) TOC content of shale in study area varies between 0.13% and 8.58% with the average content of 1.98%; the organic matter type is mainly Ⅲ and a little Ⅱb; thermal maturity of organic matter ranges from 0.61% to 1.48% with the average of 0.93%; and mineral composition of shale mainly consists of clay minerals and quartz and kaolinite and mixed layer illite/smectite (I/S) are the staple clay types. 2) Adsorption capacity increases with TOC content, and the maximum adsorption amount per unit TOC increases with Ro value; and the adsorptivity of clay mineral is associated with its type. 3) Brittle deformed shale and brittle-ductile deformed shale have different adsorption isotherm characteristics.
BU Hongling , JU Yiwen , WANG Guochang , FANG Lizhi , YAN Zhifeng , LI Qingguang . Composition and adsorptivity of shales in coal-bearing rock strata of Huainan coalfield[J]. Journal of University of Chinese Academy of Sciences, 2015 , 32(1) : 82 -90 . DOI: 10.7523/j.issn.2095-6134.2015.01.014
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