Effects of temperature gradient and particle size on self-ignition temperature of low-rank coal excavated from inner Mongolia, China.

ABSTRACT: This study investigates the effects of temperature gradient and coal particle size on the critical self-ignition temperature T _CSIT of a coal pile packed with low-rank coal using the wire-mesh basket test to estimate T _CSIT based on the Frank-Kamenetskii equation. The values of T _CSIT, the temperature gradient and the apparent activation energy of different coal pile volumes packed with coal particles of different sizes are measured. The supercriticality or subcriticality of the coal is assessed using a non-dimensional index I_HR based on the temperature gradient at the temperature cross-point between coal and ambient temperatures for coal piles with various volumes and particle sizes. The critical value I_HRC

SUBMITTER: Wang Y 

PROVIDER: S-EPMC6774983 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature