Abstract
The combustion behavior in supercritical water was investigated with brown coal as a representative of low-grade resources by the semi batch equipment. The brown coal was injected into the reactor in which the supercritical water and the oxidmr were supplied continuously. It was confirmed that (1) the complete combustion in supercritical water was performed at 873 K or more and 20 MPa or more, (2) the combustion time was less than 1 minute and (3) the combustion free from NO, and SO, in the exhaust gas could be possible in supercritical water at 873 K under 30 MPa. In the power-generation system using supercritical water combustion, these results suggested that the exhaust gas processing equipment would be unnecessary.