Abstract:

The high volatile non-caking coal was preheated at different atmosphere, different temperature and different time in the self-designed heat treatment device. The influence of heat treatment condition on oxygen containing functional group, coal molecular structure, vitrinite random reflectance as well as pyrolysis and caking tendency were studied. The result showed that the volatile matter of non-caking coal after heat treatment was removed by 21%~25%; the hydroxyl removal rate in oxygen containing functional group of coal sample can be up to 90% or more; the H/C change of treated sample was not big, O/C is lowered by 50%. The experiment showed the possibility that the coal blend components can be replaced by the preheated coal sample.