Nuclear Magnetic Resonance Study on Microstructure and Permeability of Coals of Different Ranks

Figure 9

Low temperature liquid nitrogen adsorption curve of coal sample and pore size distribution curve of coal sample. (a) XJ-1, (b) XJ-2, (c) HB-1, (d) HB-2, (e) ZM-1, and (f) ZM-2.

(a)

(b)

(c)

(d)

(e)

(f)