Coal gasification with water under supercritical conditions

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Solid Fuel Chemistry (English Translation)

DOI:https://doi.org/10.3103/S0361521907040064· OSTI ID:21037016

Vostrikov, A A; Psarov, S A; Dubov, D Yu; Fedyaeva, O N; Sokol, M Ya ^[1]

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1. Russian Academy of Sciences, Novosibirsk (Russian Federastion). Kutateladze Institute of Thermophysics, Siberian Division

The conversion of an array of coal particles in supercritical water (SCW) was studied in a semibatch reactor at a pressure of 30 MPa, 500-750{sup o}C, and a reaction time of 1-12 min. The bulk conversion, surface conversion, and random pore models were used to describe the conversion. The quantitative composition of reaction products was determined, and the dependence of the rate of reaction on the degree of coal conversion, reaction time, and reaction temperature was obtained on the assumption of a first-order reaction and the Arrhenius function. It was found that the gasification of coal under SCW conditions without the addition of oxidizing agents is a weakly endothermic process. The addition of CO{sub 2} to SCW decreased the rate of conversion and increased the yield of CO. It was found that, at a 90% conversion of the organic matter of coal (OMC) in a flow of SCW in a time of 2 min, the process power was 26 W/g per gram of OMC.

• OSTI ID: 21037016
• Journal Information: Solid Fuel Chemistry (English Translation), Journal Name: Solid Fuel Chemistry (English Translation) Journal Issue: 4 Vol. 41; ISSN SFCHDV; ISSN 0361-5219
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHEMICAL REACTION KINETICS
COAL CONVERSION
COAL GASIFICATION
PRESSURE DEPENDENCE
SUPERCRITICAL STATE
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
WATER