Comparison of the R-70 self-heating rate of New Zealand and Australian coals to Suggate rank parameter
Beamish, B. B. (2005) Comparison of the R-70 self-heating rate of New Zealand and Australian coals to Suggate rank parameter. International Journal of Coal Geology, 641-2: 139-144. doi:10.1016/j.coal.2005.03.012
Samples from New Zealand and Australia have been tested in an adiabatic oven to assess the effect of rank on the R-70 selfheating rate of coal. A non-linear relationship can be defined for coals from both countries using the revised Suggate rank (S-r) parameter. Subbituminous coals have the highest R-70 self-heating rate values, which are 20 times that of high volatile A bituminous coals on a dry mineral matter free basis (similar to 1 cf. 20 degrees C h(-1)). However, the moderating effects of moisture and mineral matter can reduce this difference to only 2-3 times for coal in-situ. (c) 2005 Elsevier B.V All rights reserved.