Activated carbon production from low ash subbituminous coal with CO2 activation

Hsisheng Teng, Hung Chi Lin, H. Teng

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Activated carbon was prepared by physical activation in CO2 from a low-ash subbituminoits coal. The preparation process consisted of carbonization of the coal in N2 followed by activation of the resulting chars in CO2. Tlte activation temperature ranged from 700 to 950°C. Experimental results revealed that the surface area, pore volume and average pore diameter of the activated carbon generally increased with the amount of carbon bumojf carried out at the same temperature. Tiiese surface characteristics were also influenced by the variation of the activation temperature. It was found that the porosity of the carbon passed through a maximum at a temperature of 750°C. The activation energy for the carbon gasification in CO2 was calculated to be in a range of 130-180 kJ/mol, based on the assumption that the reaction rate was proportional to the surface area of the carbon. Ttie apparent order with respect to CO2 partial pressure for the gasification was found to be within the range of 0.15-0.25.

Original languageEnglish
Pages (from-to)1170-1177
Number of pages8
JournalAIChE Journal
Volume44
Issue number5
DOIs
Publication statusPublished - 1998 Jan 1

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Coal Ash
Activated carbon
Coal ash
Carbon
Chemical activation
Gasification
Temperature
Coal
Carbonization
Partial pressure
Reaction rates
Trout
Activation energy
Porosity
Partial Pressure

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

Cite this

Teng, Hsisheng ; Lin, Hung Chi ; Teng, H. / Activated carbon production from low ash subbituminous coal with CO2 activation. In: AIChE Journal. 1998 ; Vol. 44, No. 5. pp. 1170-1177.
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Activated carbon production from low ash subbituminous coal with CO2 activation. / Teng, Hsisheng; Lin, Hung Chi; Teng, H.

In: AIChE Journal, Vol. 44, No. 5, 01.01.1998, p. 1170-1177.

Research output: Contribution to journalArticle

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