One of the ways to face the abatement of CO2 emissions in power plants is the combustion of coal using oxy-fuel technology. In this case coal would be burned in a O2/CO2 atmosphere and the flue gas would consist mainly of CO2 which could be more easily confined. Most of the work related to oxyfuel combustion has been applied to high volatile coals. In this study run of mine and single seam coals ranging in the anthracite rank interval have been burned under oxy-fuel combustion conditions. A drop tube furnace (DTF) operated at 1300 ºC with oxygen concentration in CO2 ranging from 0 to 30 % has been used to prepare the chars. The results have been compared with those of conventional combustion in air using the same DTF.Endesa, the Principality of Asturias (Principado de Asturias), Project PC04-03 and the Ministry for Education (Ministerio de Educación), Project PSE2-2005Peer reviewed