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《ACTA SEDIMENTOLOGICA SINICA》 1998-01
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Simulation of the Hydrocarbon Generation and Expulsion of Coal by Hydrous Pyrolysis

Li Rongxi; Jin Kuili(Beijing Graduate School,China University of Mining and Technology, Beijing 100083)  
Hydrous pyrolysis experiment was carried out using Carboniferous bright brown coal (R0=0. 56% ) near Shengli Oil-field,East China to evaluate the hydrocarbon generation potential of coal. The coal sample is vitrinite-rich (74. 5 % ) and liptinite-poor(8. 8 % ) with inertinite of 16. 7 %. Much of vitrinite in the sample consists of hydrogen-rich desmocollinite. The hydrous pyrolysis was performed at 200℃, 230℃, 260℃, 290℃, 320℃ and 350℃ for 72 hours,respectively. Both total pyrolysates and expelled oil increased with temperature before reaching their maximum yields at 320℃ (R0= 1. 18 % ), and decreased afterwards. The gaseous products increased sharply at 320℃ (R0= 1. 18% ) and tended to increasing evenly at their peak yield point of 350℃ (R0= 1. 53 % ). The results show that the coal has a higher hydrocarbon generation potential and expulsion effeciency. It is proposed that the hydrocarbon potential of coals depends not only on their organic matters but also on their depositional environments. Reducing conditions are favorable depositional environment for oil-prone coal. The fractures and cleats are beneficial to the expulsion of the oil from coal.
【Fund】: 国家自然科学基金!49672131
【CateGory Index】: O621.3
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