Study on Pore Structure and Fractal Characteristics of Tar-Rich Coal during Pyrolysis by Mercury Intrusion Porosimetry (MIP)

Table 2

Nanoscale pore classification of tar-rich coal.

Pore type	Pore size (nm)	Pore type	IUPAC pore size (nm)
Submicropore	<5	Micropore	<2
Micropore	5~10	Mesoporous	2~50
Transition hole	10~100
Middle hole	100~1000	Macropore	>50
Macropore	>1000