The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 MPa. The gas component yields (C₁, C₂, C₃, i-C₄, n-C₄, i-C₅, n-C₅, and CO₂); the δ¹³C of C₁, C₂, C₃, and CO₂; and the mass of the liquid hydrocarbons (C₆₊) were measured. On the basis of these data, the stage changes of δ¹³C₁, δ¹³C₂, δ¹³C₃, and δ¹³CO₂ were calculated. The diagrams of δ¹³C₁–δ¹³C₂ vs ln (C₁/C₂) and δ¹³C₂–δ¹³C₁ vs δ¹³C₃–δ¹³C₂ were used to evaluate the gas generation features of the coal maturity stages. At the high maturity evolution stage (T > 527.6 °C at 2 °C/h), the stage change of δ¹³C₁ and the CH₄ yield are much higher than that of CO₂, suggesting that high maturity coal could still generate methane. When T < 455 °C, CO₂ is generated by breaking bonds between carbons and heteroatoms. The reaction between different sources of coke and water may be the reason for the complicated stage change in \(\delta^{{{13}}} {\text{C}}_{{{\text{CO}}_{{2}} }}\) when the temperature was higher than 455 °C. With increasing pyrolysis temperature, δ¹³C₁–δ¹³C₂ vs ln (C₁/C₂) has four evolution stages corresponding to the early stage of breaking bonds between carbon and hetero atoms, the later stage of breaking bonds between carbon and hetero atoms, the cracking of C₆₊ and coal demethylation, and the cracking of C_2–5. The δ¹³C₂–δ¹³C₁ vs δ¹³C₃–δ¹³C₂ has three evolution stages corresponding to the breaking bonds between carbon and hetero atoms, demethylation and cracking of C₆₊, and cracking of C_2–5.

在50 MPa密封金管中，通过民和盆地侏罗系侏罗系煤的无水热解研究了不同成熟期煤的产气特征。气体成分产率（C ₁，C ₂，C ₃，i -C ₄，n -C ₄，i -C ₅，n -C ₅和CO ₂）；的δ ¹³的CÇ ₁，C ₂，C ₃，和CO ₂ ; 和液态烃的质量（C ₆₊）进行了测量。在这些数据的基础上，阶段改变δ ¹³ Ç ₁，δ ¹³ Ç ₂，δ ¹³ Ç ₃，和δ ¹³ CO ₂进行了计算。的图表中δ ¹³ C ^ ₁ - δ ¹³ C ^ ₂ VS LN（C ₁ / C ₂）和δ ¹³ Ç ₂ - δ ¹³ C ^ ₁ VS δ ¹³ Ç ₃ - δ¹³ C ₂用于评估煤成熟阶段的产气特征。在高成熟演化阶段（Ť  > 527.6℃下以2℃/小时），阶段变化δ ¹³ C ^ ₁和CH ₄产率是比CO的高得多的₂，这表明成熟度高煤炭仍然可以产生甲烷。当T  <455°C时，CO ₂通过打破碳与杂原子之间的键而产生。焦炭和水的不同来源之间的反应可能是\（\ delta ^ {{{{13}}} {\ text {C}} _​​ {{{\ text {CO}}} _ { {2}}}} \）当温度高于455°C时。随热解温度，δ ¹³ Ç ₁ - δ ¹³ C ^ ₂ VS LN（C ₁ / C ₂）具有对应于碳原子和杂原子，破坏碳之间的键的后期阶段之间，断裂键的早期阶段4个演化阶段杂原子，C ₆₊裂解和煤脱甲基化以及C _2-5裂解。的δ ¹³ C ^ ₂ - δ ¹³ C ^ ₁ VS δ ¹³ Ç ₃ - δ ¹³C ₂具有三个演化阶段，分别对应碳和杂原子之间的断裂键，C _6+的脱甲基和裂解以及C _2-5的裂解。