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Citation: GUO Liang, WU Zhan-Song. Mechanism of Methane’s Adsorption on Nanometer Active Carbon at Supercritical State[J]. Acta Physico-Chimica Sinica, ;2008, 24(05): 737-742. doi: 10.1016/S1872-1508(08)60030-3 shu

Mechanism of Methane’s Adsorption on Nanometer Active Carbon at Supercritical State

GUO Liang ,
WU Zhan-Song

1.
Department of Thermal Engineering, Tsinghua University, Beijing 100084, P. R. China

Received Date: 11 October 2007
Available Online: 13 March 2008

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.
- Supercritical,
- Nanometer active carbon,
- Adsorption potential,
- Methane
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