Table 1 Proximate analysis and adsorption constants of coal samples.

From: Effect of CO2 injection pressure on enhanced coal seam gas extraction

Mad/(wt %)

Aad/(wt %)

Vdaf/(wt %)

Fcd/(wt %)

R 0,max

Langmuir volume VL(mL/g)

Langmuir pressure PL(MPa)

CO2

CH4

CO2

CH4

1.5

9.17

13.24

76.34

1.50

42.7818

26.2879

2.2080

1.5718

  1. Mad, Moisture on an air-dry basis; Ad, Ash on an air-dry basis; Vdaf,Volatile matter on a dry ash free basis; FCad,Fixed carbon on an air-dry basis; RRo,max, vitrinite reflectance.
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