Long-flame coal pore structure

Heat-induced nanopore interconnection

This work reveals how temperature alters pore characteristics and hydrogen-containing substances in long-flame coal, providing new insights for predicting coal self-ignition hazards.

Xue, Shengze · Sun, Qiang · Shi, Qingmin · Jia, Hailiang

Natural Resources Research 2023

Advantages

Nanopores form at 200°C

Pores interconnect and radii increase at 200–250°C

Nanopore volume ratio increases above 250°C

T1–T2 spectral signal peaks decrease with rising temperature