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Treatment of activated carbon for methane storage
Author(s) -
Dai Xiao Dong,
Liu Xin Mei,
Zhao Guofeng,
Qian Ling,
Qiao Ke,
Yan Zi Feng
Publication year - 2008
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.148
Subject(s) - activated carbon , methane , adsorption , titration , sorption , desorption , chemistry , fourier transform infrared spectroscopy , carbon fibers , volume (thermodynamics) , specific surface area , porosity , chemical engineering , inorganic chemistry , materials science , organic chemistry , catalysis , composite material , physics , quantum mechanics , composite number , engineering
Activated carbon used for methane storage was treated with HNO 3 , H 2 SO 4 , and H 2 , and the effects of treatment on the properties of the activated carbon were studied by N 2 adsorption, temperature‐programmed desorption (TPD), Boehm titration, and Fourier transform infrared (FT‐IR) spectroscopy. Methane storage tests were carried out on untreated and treated activated carbons. It was found that surface treatment significantly influenced the surface properties and pore structures of the activated carbon. The surface area and pore volume were enhanced by acid treatment owing to the removal of impurities in the carbon; also, the number and species of the surface functional groups changed. Methane sorption capacity did increase slightly, because it was closely related to not only the porosity but also the decreased surface complex by decreased number of functional groups. H 2 treatment not only decreased the surface area and porosity but also changed surface properties, which decreased methane storage capacity. In general, results of our study showed that surface treatment of activated carbon was not beneficial in methane storage. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.