Adsorption of Methane, Ethane, Propane and Butane on a Mesoporous Activated Carbon

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Abstract

The adsorption isotherms of methane, ethane, propane and butane were measured by a volumetric method on activated carbon AC1 at 283, 293, 303 and 313 K. Adsorption characteristic of AC1 was determined by nitrogen adsorption at 77 K. The BET surface area and pore volume calculated from the isotherm are 956 m²·g^-1 and 1.36 mL·g^-1, respectively. The pore size mainly distributes from 1 nm to 5 nm and the rate of mesopores is about 61%. Langmuir equation and Langmuir-Freundlich equation (L-F equation) were applied to fit the adsorption isotherms of methane, ethane, propane and butane. It is showed that all the isotherms are type I isotherms, and L-F equation is better than Langmuir equation to describe the isotherms, which provide fundamental data for the further research on multi-component adsorption equilibrium. The equilibrium adsorption selectivity coefficient of ethane/propane on AC1 is approximately 1.7-2.5. The adsorption selectivity is decreased under a higher adsorption pressure, while adsorption temperature has no significant effect on its selectivity.

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	Articles by authors
	Su Wei
	Wu Feifei
	Sun Yan

Keywords： natural gas； adsorption separation； adsorption isotherm

Received 2014-04-05;

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Cite this article:

Su Wei, Wu Feifei, Sun Yan.Adsorption of Methane, Ethane, Propane and Butane on a Mesoporous Activated Carbon[J] Chemcial Industry and Engineering, 2016,V33(3): 50-54

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