Simul ation of the Hydrocarbon Generation and Expul sion of Coal by Hydrous Pyrolysis

Li Rongxi; Jin Kuili

Abstract

Hydrous pyrolysis experiment was carried out using Carboniferous bright brown coal(R°=0. 56%)nearShengli Oil-field , East China to evaluate the hydrocarbon generation potential of coal. The coal sample is vitri-nite-rich ( 74. 5%)and liptinite-poor ( 8. 8%)with inertinite of 16. 7%.Much of vitrinite in the sample con-sists 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 temperaturebefore reaching their maximum yields at 320'C (R°=1. 18%)，and decreased afterwards. The gaseous prod-ucts increased sharply at 3200℃(R°=1. 18%)and tended to increasing evenly at their peak yield point of350'℃(R°=1. 53%).The results show that the coal has a higher hydrocarbon generation potential and expul-sion effeciency. It is proposed that the hydrocarbon potential of coals depends not only on their organic mat-ters but also on their depositional environments. Reducing conditions are favorable depositional environmentfor oil-prone coal. The fractures and cleats are beneficial to the expulsion of the oil from coal.

Keywords:

References

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Simul ation of the Hydrocarbon Generation and Expul sion of Coal by Hydrous Pyrolysis

Abstract

References

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