Formation of the pore structure of brown coal upon thermolysis with potassium hydroxide

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Solid Fuel Chemistry (English Translation)

DOI:https://doi.org/10.3103/S0361521909050097· OSTI ID:21240320

Shendrik, T G; Tamarkina, Y V; Khabarova, T V; Kucherenko, V A; Chesnokov, N V; Kuznetsov, B N ^[1]

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1. National Academy of Sciences of Ukraine, Donetsk (Ukraine). Litvinenko Institute of Physicoorganic Chemistry and Coal Chemistry

The pore-structure characteristics of active carbons prepared by the thermolysis (800{sup o}C) of brown coal impregnated with potassium hydroxide were studied. The dependence of the specific surface area, total pore volume, micropore volume, micropore fraction, and micropore size distribution on the KOH/coal weight ratio R{sub KOH}{le} 1.0 g/g was found. Condensation processes with the formation of a low-porosity material were predominant at low ratios of R{sub KOH} {le} 0.1 g/g. The development of a micropore structure was observed at R{sub KOH} {ge} 0.1 g/g, and it increased as R{sub KOH} was increased to 1.0 g/g. It was hypothesized that pore formation was due to the thermally initiated reactions of the structural fragments of coal with KOH molecules, which occurred within the framework of coal.

• OSTI ID: 21240320
• Journal Information: Solid Fuel Chemistry (English Translation), Journal Name: Solid Fuel Chemistry (English Translation) Journal Issue: 5 Vol. 43; ISSN SFCHDV; ISSN 0361-5219
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACTIVATED CARBON
ALKALI METAL COMPOUNDS
BROWN COAL
HEAT TREATMENTS
IODINE
METHYLENE BLUE
MICROSTRUCTURE
PORE STRUCTURE
POTASSIUM HYDROXIDES
PYROLYSIS
SORPTIVE PROPERTIES
SPECIFIC SURFACE AREA
VAPOR CONDENSATION
VOLATILE MATTER