Mechanisms of carbon isotopic fractionation in the process of natural gas generation: Geochemical evidence from thermal simulation experiment

PENG Weilong,LIU Quanyou,HU Guoyi,LYU Yue,ZHU Dongya,MENG Qingqiang,GUO Fengtao,WANG Ruoli

Table 3 Carbon isotopic composition of alkane gas in toluene thermal simulation.

Temperature/oC δ13C/‰ CH4 C2H6 C3H8 450 -27.7 -28.1 -23.5 475 -31.8 -31.0 -23.1 500 -30.5 -28.8 -19.3 525 -29.9 -24.4 -15.1 550 -29.5 -20.4 -16.9