Coking coal's stronger absorption capacity could revolutionize coal-bed methane exploitation.
The researchers studied the pore distribution and absorption characteristics of gas coal and coking coal. They found that coking coal has more complex pore structures with smaller pores compared to gas coal. The absorption capacity of coal is determined by the distribution of micro pores, with the most effective absorption pores being below 10 nm. Coking coal has a stronger absorption capacity than gas coal. The absorption capacity difference between the two types of coal leads to less absorption in high-pressure stages compared to low-pressure stages. This research helps understand how coal absorbs gases in deep coal beds, which is important for coal and gas safety and methane extraction.
