The Effect of Pore Volume of Hard Coals on Their Susceptibility to Spontaneous Combustion

<table>Value of spontaneous combustion index <svg height="20.987499" id="M42" style="vertical-align:-0.17554pt" version="1.1" viewbox="0 0 24.3125 20.987499" width="24.3125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,-0,0,-.012,15.263,12.5)"><path d="M433 39l-85 -51q-27 0 -47 20q-16 16 -24 44q-5 -3 -24 -16.5t-27 -18.5t-23 -13.5t-25 -12t-19 -3.5q-52 0 -86 36.5t-34 85.5q0 71 81 99q128 43 155 65v17q0 54 -23 83.5t-62 29.5q-28 0 -45 -19t-29 -66q-7 -23 -29 -23q-15 0 -29 13t-14 30t31 40q25 19 68.5 40.5
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</svg> of coal as a function of macropore surface area.</table>

Journal of Chemistry

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Figure 4

Figure 4: The Effect of Pore Volume of Hard Coals on Their Susceptibility to Spontaneous Combustion 