Pore structure and its impact on CH4 adsorption capacity and flow capability of bituminous and subbituminous coals from Northeast China

- An integrated approach to characterize PS/VD distribution for coals is proposed.
- SAXS shows the micropores less than 10 nm consist over 90% of micropores volume.
- Micropore (2-5 nm) has greater impact on CH4 adsorption than that of mesopore.
- Smooth surface of coal pores (r > 10 nm) is also favorable for CH4 adsorption.