Method for Analyzing the Molecular and Carbon Isotope Composition of Volatile Hydrocarbons (C₁–C₉) in Natural Gas

Figure 8

Carbon isotope composition of hydrocarbons in natural gas. (a) 1, Methane; 2, ethane; 3, propane; 4, n-butane; 5, n-pentane; 6, n-hexane; 7, n-heptane; 8, n-octane; 9, n-nonane; 10, benzene. (b) 1, Isobutane; 2, neopentane; 3, isopentane; 4, methyl cyclopentane; 5, cyclohexane; 6, 2-methylpentane; 7, 3-methylpentane; 8, 2,2/3,3-dimethyl pentane; 9, methyl cyclohexane; 10, 2/3-methylhexane +2,3-dimethyl pentane; 11, methylbenzene; 12, ethylbenzene; 13, p-xylene; 14, o-xylene.

(a)

(b)