High-porosity carbons prepared from bituminous coal with potassium hydroxide activation

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie990101+· OSTI ID:691436

Teng, H; Hsu, L Y ^[1]

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1. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Chemical Engineering

Porous carbons with a very high porosity were prepared from an Australian bituminous coal with KOH activation. The preparation process consisted of KOH impregnation followed by carbonization in nitrogen at 500--1000 C for 0--3 h. Surface area and pore volume of the resulting carbons were found to increase with the carbonization temperature to a maximum at 800 C and then begin to decrease. It has been suggested that carbon gasification by the released CO{sub 2} and the oxygen in potassium containing compounds plays an important role in determining the pore structures. The porosity development was affected by the chemical ratio of KOH to coal. The optimum chemical ratio for preparing a high-porosity carbon varies with carbonization conditions. A process consisting of impregnation at a chemical ratio of 4.25 followed by carbonization at 800 C for 1 h was recommended for producing a high surface area (>3000 m{sup 2}/g) carbon.

• OSTI ID: 691436
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 8 Vol. 38; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACTIVATED CARBON
BITUMINOUS COAL
CARBONIZATION
CHEMICAL ACTIVATION
POROSITY
POTASSIUM HYDROXIDES
SURFACE AREA
SYNTHESIS