Investigation of Hydrocarbon Generation from Jurassic Coal Measures in the Southern Junggar Basin, Northwestern China, Using Closed-System Pyrolysis.

The C 1 and C 1–5 yields continuously increased over the entire pyrolysis temperature range and still showed an increasing trend at the final two temperatures, indicating that gas generation in coal pyrolysis had not yet been completed at 600 °C.

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The dryness ratio (C 1 /C 1–5 , vol/vol) in the 2 °C/h run showed an initial decreasing trend and a subsequent increasing trend, acquiring a minimum value of 0.5 at 360 °C. The evolution of total hydrocarbon yield was complex, i.e., showing an increasing trend at first, then a decreasing trend, and finally an increasing trend once more.

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