TY - JOUR
TI - Thermal analyses of the lignite combustion in oxygen-enriched atmosphere
AU - Chen Xiangyun
AU - Zhang Yongfeng
AU - Zhang Qiancheng
AU - Li Chunping
AU - Zhou Quan
JN - Thermal Science
PY - 2015
VL - 19
IS - 3
SP - 801
EP - 811
PT - Article
AB - In this work, the oxygen-enriched combustion behavior of indigenous lignite  was measured by a thermogravimetric analyzer (TG). Combustion tests were  carried out in N2/O2 atmosphere with an oxygen content ranging from 21% to  70 vol%.The data show that the calorific value per unit time (CVT) of the  lignite was improved with increased oxygen concentration. In order to reveal  the oxygen-enriched combustion process in detail, a new index of  characteristic temperature Tc was defined to indicate the fixed carbon  behavior during burning, and the combustibility indexes D’, Rw, and S were  calculated to determine the combustion performance. The functional relation  between CVT and oxygen concentration was determined by non-linear fitting  method. The results indicated that the relationship between CVT and oxygen  concentration fit the exponential function exactly.