Thermodynamic Characteristics of Methane Adsorption of Coal with Different Initial Gas Pressures at Different Temperatures

Figure 2

Experimental system. (1) Coal sample, (2) adsorption instrument, (3) high-temperature heater, (4) thermocouple thermometer, (5) GW-1200A temperature controller, (6) gas collection device, (7) gas storage cylinder, (8) vacuum pump, (9) valve, (10) digital pressure gauge with precision ±1.0 kPa, (11) connections, and (12) pipings.