The influence of CaCO3 on Guizhou anthracite char?CO2 gasification reactivity was studied. The effects of CaCO3 coking method, gasification temperature and addition amount on the gasification reactivity were investigated in a fixed-bed reactor at atmospheric pressure. The calcium forms existing during the coal pyrolysis or char gasification, functional groups of coal char and the surface morphology of coal char were characterize. The results showed that the gasification activity of coke obtained by loading CaCO3 after pyrolysis is higher than that by loading CaCO3 before pyrolysis. The gasification activity increased with the increase of CaCO3 addition, but when the addition amount was more than 3.5%(?), the gasification activity changed little. In the process of pyrolysis and char gasification, CaCO3 will react with other substances in coal and convert to CaS and CaAl2Si2O8.
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