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Acta Phys. -Chim. Sin.  2008, Vol. 24 Issue (05): 737-742    DOI: 10.1016/S1872-1508(08)60030-3
Mechanism of Methane’s Adsorption on Nanometer Active Carbon at Supercritical State
GUO Liang; WU Zhan-Song
Department of Thermal Engineering, Tsinghua University, Beijing 100084, P. R. China
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Abstract  Isosteric heats and adsorption isotherms of methane on nanometer active carbon were measured at supercritical temperature (273-373 K) and pressure from 0 to 10 MPa. The measured data agreed well with Dubinin-Astakhov (DA) model at lower pressure but failed when pressure exceeded a special range. General Freundlich (GF) equation was used to modify the DA equation at high pressure and thus formed a combined bisection model GFDA. The adsorption mechanism of methane on nanometer active carbon was raised according to GFDA model and the heterogeneous energy distribution of the adsorbent was analyzed.

Key wordsSupercritical      Nanometer active carbon      Adsorption potential      Methane     
Received: 11 October 2007      Published: 13 March 2008
MSC2000:  O647  
Corresponding Authors: WU Zhan-Song     E-mail:
Cite this article:

GUO Liang; WU Zhan-Song. Mechanism of Methane’s Adsorption on Nanometer Active Carbon at Supercritical State. Acta Phys. -Chim. Sin., 2008, 24(05): 737-742.

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