Structural comparison of hazardous and non hazardous coals based on gas sorption experiments

摘要

Comparison of carbon-dioxide and propane sorption at ambient temperature was used for characterising the difference of the structure of hazardous and non hazardous coals. However hazardous coals were found more microporous or contain more closed pores than non hazardous ones, this difference couldn't have been enlarged and attributed to one petrographic component by producing the density fractions. Gas sorption isobars (nitrogen, methane, ethane) are proposed to make a distinction between fine pore structure of coals.