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

Hsisheng Teng, Li Yeh Hsu

研究成果: Article同行評審

80 引文 斯高帕斯(Scopus)

摘要

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 CO2 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 m2/g) carbon.

原文English
頁(從 - 到)2947-2953
頁數7
期刊Industrial and Engineering Chemistry Research
38
發行號8
DOIs
出版狀態Published - 1999 1月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 工業與製造工程

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