Thermal Analysis of Long-Term Storage Lignite in Oxygen-Enriched Air

摘要

The combustion behavior of fresh lignite and long-term storage lignite from the same region were assessed in O2/N2 background gases by using thermogravimetric analyzer. The oxygen mole fraction is in the range of 21-80 %. The results show that the combustion ability of long-term storage lignite is weaker than the fresh one. The storage lignite almost unable to ignite when the oxygen content per cent is 21% and can't burn out before 30 % O2 atmosphere. While the fresh sample can burn out completely in each atmosphere. Oxygen-enriched atmosphere improve the combustion and ignition capacity of the long-term storage lignite, especially the partial pressure of O2 above 40 %.