2016, №1

сс. 72-83

Partial and Complete Oxidation of Brown Coal in a Supercritical Water-Oxygen Fluid at Counter Flow Supply of Reactants

2016, №1

сс. 72-83

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A.A. Vostrikov, D.Yu. Dubov, M.Ya. Sokol, O.N. Fedyaeva

Key words: brown coal, coal-water slurry, supercritical water-oxygen fluid, combustion, gasification

The oxidation of brown coal continuously supplied as a coal-water slurry into a counter
flow of supercritical water-oxygen fluid at 30 MPa and the temperature difference in
the reactor along its axis (673—873 K) is studied. If a part of coal is burnt in the conditions
of O2 deficiency, the yield of products enriched with hydrogen is increased at the
expense of the producing heat of oxidation reactions. In excess of O2 the complete
oxidation of coal occurs; in this case the heat generation per unit volume of furnace
space about 1.0 MW/m3 is reached. It is shown that the heat expenditures from external
sources required to carry out the process can be partially or completely compensated
by the heat generated during homogeneous and heterogeneous combustion coupled
with the coal pyrolysis.

doi:10.1134/S1990793116080169