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Acta Phys. -Chim. Sin.  2007, Vol. 23 Issue (07): 1080-1084    DOI: 10.3866/PKU.WHXB20070722
Separation of Hydrogen and Carbon Dioxide in Activated Mesocarbon Microbeads with High Specific Surface
YUE Qiao-Hong; SHAO Xiao-Hong; CAO Da-Peng
College of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China; Key Laboratory of Nanomaterials of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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On the basis of experimental data, double-Langmuir (DL) model was used to investigate the adsorption and separation of hydrogen and carbon dioxide in activated mesocarbon microbeads with high specific surface. Pure and binary adsorption isotherms of carbon dioxide and hydrogen (mole ratio is 1:9) in activated mesocarbon microbeads were measured using the high-precision intelligent gravimetric analyzer at temperature of 298, 273 and 268 K, and the pressure ranging from 0 to 1.8 MPa. In order to get adsorption amount of the single component of mixture gas, the DL model and the ideal adsorbed solution theory (IAST) were combined. The combined method can be applied to carbon dioxide and hydrogen binary systems perfectly. The calculated results indicated that the selectivity of carbon dioxide can reach 73.4 at 268 K and 1.7 MPa, which suggests that the activated mesocarbon microbead was an excellent candidate for the removal of carbon dioxide in hydrogen/carbon dioxide mixtures.

Key wordsActivated mesocarbon microbeads      Hydrogen      Carbon dioxide      Adsorption selectivity      Double Langmuir model     
Received: 02 February 2007      Published: 31 May 2007
MSC2000:  O647  
Corresponding Authors: SHAO Xiao-Hong     E-mail:
Cite this article:

YUE Qiao-Hong; SHAO Xiao-Hong; CAO Da-Peng. Separation of Hydrogen and Carbon Dioxide in Activated Mesocarbon Microbeads with High Specific Surface. Acta Phys. -Chim. Sin., 2007, 23(07): 1080-1084.

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