Nitrogen uptake on coal char at ambient temperature and the effect of the uptake on ultimate analysis

摘要: The exposure of Taiheiyo and Blair Athol coal chars to air at ambient temperature led the adsorption an appreciable amount N 2 on chars. Some thus adsorbed still remained even after purging with He gas flow. remaining was determined by subsequent temperature-programmed desorption experiment, it found that accounted for a substantial portion nitrogen content ultimate analysis using instrumental analyzer each char. In other words, is overestimated. Accordingly, obtain correct value, necessary remove such . Evacuation 423 K 5 h prior enough this purpose.