Activated carbon production from low ash subbituminous coal with CO2 activation

Hsisheng Teng, Hung Chi Lin, H. Teng

研究成果: Article

47 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)1170-1177
頁數8
期刊AIChE Journal
44
發行號5
DOIs
出版狀態Published - 1998 一月 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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