Pore-size effects on activated-carbon capacities for volatile organic compound adsorption

Mei Chiung Huang, Chia Huei Chou, Hsisheng Teng

研究成果: Article同行評審

44 引文 斯高帕斯(Scopus)

摘要

Gas-phase adsorption of acetone and n-hexane by activated carbons with different pore structures was investigated. The carbons were prepared from a bituminous coal with KOH activation. Increasing the activation temperature increased both the porosity and pore size. The equilibrium adsorption capacity for the organic compounds increased with the carbon porosity, but not proportionally. The percentage of pore volume utilized showed a decreasing trend with the porosity development for acetone adsorption, while an increasing trend was observed for n-hexane. By incorporating pore size distribution with the Dubinin-Radushkevich equation using an inverse proportionality between the micropore size and adsorption energy, the isotherms for adsorption onto different carbons can be well predicted. Simulations indicated that the adsorption energy, which is an inverse function of the micropore size, determines the adsorption capacity. Different effects of porosity development were observed for different adsorbates.

原文English
頁(從 - 到)1804-1810
頁數7
期刊AIChE Journal
48
發行號8
DOIs
出版狀態Published - 2002 八月 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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