Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example

作     者：Deliang Fu Guosheng Xu Li Ma Fu Yang Dan He Zhonghui Duan Yu Ma Deliang Fu;Guosheng Xu;Li Ma;Fu Yang;Dan He;Zhonghui Duan;Yu Ma

作者机构：Key Laboratory of Coal Exploration and Comprehensive UtilizationMinistry of Nature and ResourcesShaanxi Coal Geology Group Co.Ltd.Xi’an710021China College of EnergyChengdu University of TechnologyChengdu610059China Ningxia Institute of Geological SurveyYinchuan750000China 

出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)

年 卷 期：2020年第7卷第3期

页      面：611-622页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：The authors would like to thank Prof.Liu Jinzhong and Dr.Xu An for their great help on experiments analysis.This work is financially supported by the Major science and technology projects of Shaanxi Coal Geology Group Co.,Ltd.(SMDZ-2019ZD-1) Independent subject of the Key Laboratory of Coal Exploration and Comprehensive Utilization,Ministry of Nature and Resources(ZP2019-3) the“Enterprise top innovative young talents support plan”(20190412) the“Shaanxi Provincial Postdoctoral Science Foundation(No.2018M633642XB)” China Postdoctoral Science Foundation(No.2018M633642XB) 

主　　题：Jurassic coal Pyrolysis Gas generation δ13C Stage evolution 

摘      要：The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 *** gas component yields(C1,C2,C3,i-C4,n-C4,i-C5,n-C5,and CO2);theδ13C of C1,C2,C3,and CO2;and the mass of the liquid hydrocarbons(C6+)were *** the basis of these data,the stage changes ofδ13C1,δ13C2,δ13C3,andδ13CO2 were *** diagrams ofδ13C1–δ13C2 vs ln(C1/C2)andδ13C2–δ13C1 vsδ13C3–δ13C2 were used to evaluate the gas generation features of the coal maturity *** the high maturity evolution stage(T527.6°C at 2°C/h),the stage change ofδ13C1 and the CH4 yield are much higher than that of CO2,suggesting that high maturity coal could still generate *** T455°C,CO2 is generated by breaking bonds between carbons and *** reaction between different sources of coke and water may be the reason for the complicated stage change inδ13CCO2 when the temperature was higher than 455°*** increasing pyrolysis temperature,δ13C1–δ13C2 vs ln(C1/C2)has four evolution stages corresponding to the early stage of breaking bonds between carbon and hetero atoms,the later stage of breaking bonds between carbon and hetero atoms,the cracking of C6+and coal demethylation,and the cracking of C2–***δ13C2–δ13C1 vsδ13C3–δ13C2 has three evolution stages corresponding to the breaking bonds between carbon and hetero atoms,demethylation and cracking of C6+,and cracking of C2–5.