Hydrothermolysis of brown coal in cyclic pressurization–depressurization mode

[Display omitted] ► A new technique for brown coal conversion in supercritical water is suggested. ► At coal conversion high-grade solid, liquid, and gaseous fuels are produced. ► Products composition and degree of desulfurization of coal residue are obtained. The new technique of usage of supercrit...

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Bibliographic Details
Published in:The Journal of supercritical fluids 2012-02, Vol.62, p.155-164
Main Authors: Fedyaeva, O.N., Vostrikov, A.A., Shishkin, A.V., Sokol, M. Ya, Fedorova, N.I., Kashirtsev, V.A.
Format: Article
Language:English
Subjects:
Brown coal
Coal
COM
Condensing
Conversion
Discharge
Flammability
Pressurization–depressurization
Removal of sulfur and oxygen
Residues
Supercritical water
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Summary:[Display omitted] ► A new technique for brown coal conversion in supercritical water is suggested. ► At coal conversion high-grade solid, liquid, and gaseous fuels are produced. ► Products composition and degree of desulfurization of coal residue are obtained. The new technique of usage of supercritical water (SCW) for brown coals conversion into both liquid (condensed), and solid and gas (volatile) fuels is proposed. The method consists in cyclic filling of SCW up to the given pressure (pressurization) into the tubular reactor, filled with coal particles, and fast discharging of conversion products dissolved in SCW (depressurization). The dynamics and composition of conversion products in a mode of stepwise temperature (310–460°C) and pressure (9–31MPa) rise at cyclic filling and discharging of, first, the water vapor (T
ISSN:0896-8446
1872-8162
DOI:10.1016/j.supflu.2011.11.028