Adsorption/Desorption Performance of CO2on Pitch-based SphericalActivated Carbons

doi:10.3724/SP.J.1077.2011.00149

Abstract

Abstract: Therelationship between the pore structure parameter of pitch-based sphericalactivated carbons (PSACs) and adsorption capacity ofCO₂ was investigated as well as the desorption performance. The pore structure characteristics of PSACs were analyzed by nitrogenadsorption at 77K and the equilibrium adsorption amount of CO₂ wasdetermined through the breakthrough curve. The results indicated that there wasa linear relationship between the equilibrium adsorption amount of CO₂and the specific surface area of micropores with pore size smaller than 1 nm.When 5% melamine was coated on the surface of PSAC, the equilibrium adsorptionamount of CO₂ increased 26.3% from 0.91 mmol/g to 1.15 mmol/g. Thedesorption cycle efficiency of CO₂ is 74.6% with Vacuum SwingAdsorption (VSA), while it can reach 100% with combined Electric SwingAdsorption (ESA) and VSA.

Key words: pitch-based spherical activated carbon, carbon dioxide, adsorption

CLC Number:

TQ127

XIE Fei, WANG Yan Li, ZHAN Liang, GE Ming, LIANG Xiao-Yi, QIAO Wen-Ming, LING Li-Cheng. Adsorption/Desorption Performance of CO₂on Pitch-based SphericalActivated Carbons[J]. Journal of Inorganic Materials, 2011, 26(2): 149-154.

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Adsorption/Desorption Performance of CO₂on Pitch-based SphericalActivated Carbons

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