Combustion of Carbonized Coal Residue in a Mixture of Ammonium Nitrate and Supercritical Water
A. A. Vostrikov, O. N. Fedyaeva, A. V. Shishkin, and M. Ya. Sokol
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences
Novosibirsk, 630090 Russia
Keywords: combustion, supercritical water, coal, ammonium nitrate
Abstract
The possibility of low-temperature oxidation of a solid carbonized coal residue in a mixture of NH4NO3 and supercritical water (723 K and 30 MPa) is shown for the first time and its mechanism is described. Conjugate processes of oxidation of the carbonized residue and formation of combustible gases H2 and CH4 caused by the participation of H2O in redox reactions was found. It was established that the ash residue has a high porosity and consists of agglomerated nanoparticles of silicon and metal oxides.
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