01582nab a2200205 4500 20260520001829.0 260224s2010 xxu Pyrolysis of one crude oil and its asphaltenes: Evolution of gaseous hydrocarbons and carbon isotope mar. 2010 12/07/2010 ; 12/07/2010 5 p. ; 8-12 Transcripción del resumen del autor. Pyrolysis was carried out in anhydrous closed system (gold tubes) under a constant pressure of 50 MPa to discuss the differences of gas generation mechanism between crude oil and its asphaltenes. Yields and carbon isotopic composition of gaseous hydrocarbons were determined. The results show that the yield curves of gaseous hydrocarbons generated from crude oil have analogy change trends with that of asphaltenes correspondingly. The yield of methane generated from asphaltene cracking is 50% of that of oil cracking when oil and asphaltene cracked completely. The relation of d13C1 < d13C2 < d13C3 exists in the whole process of pyrolysis, and the d13C value of methane, ethane and propane generated from oil is more than that of asphaltene correspondingly. Kinetic parameters of gaseous hydrocarbon generation for crude oil and asphaltene were obtained by kinetic calculation, and the result can be extrapolated to geological conditions. 1-2 Journal of Petroleum Science & Engineering 71 ARTICULO Wang, T. 43532 Geng, A. 45593 Li, X. 26046 174931 174931 0 0 0 0 242750 BAAB BAAB 2026-03-05 200046808 0 200046808 2026-03-05 18:52:27 2026-03-05 ARTICULO