| ADSORPTION ISOTHERMS AND POTENTIAL DISTRIBUTIONS OF NITROGEN ON VARIOUS ACTIVATED CARBONS |
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| 作者姓名： | LI Xiang LI Zhong LUO lingai Chemistry |
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| 作者单位： | LI Xiang1 LI Zhong2 LUO lingai3 1 Chemistry Department of Zhaoqing University，Zhaoqing 526061，China 2 The Institute of Chemical Engineering South China University of Technology，Guangzhou 510640，China 3 Locie Esigec-Université de Savoie，Campus Scientifique，Savoie Technolac 73376 Le Bourget-Du-Lac cedex，France |
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| 基金项目： | Natural Science Foundation of Guangdong Province (No. 36566) |
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| 摘 要： | 1. INTRODUCTION Activated carbon, a kind of microporous materials, is widely used as adsorbents and catalytic supports. The knowledge of their basic sorption and structural characteristics is an important factor that determines or limits their applications. Various modern techniques, such as electron microscopy, small angle X-ray scattering, NMR, and some classical measurements, such as calorimetric measurements, adsorption-desorption of vapors and liquids, have been applied. Classical a…
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ADSORPTION ISOTHERMS AND POTENTIAL DISTRIBUTIONS OF NITROGEN ON VARIOUS ACTIVATED CARBONS |
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| Abstract: | The adsorption isotherms of four activated carbons (Norit RB1, Chemviron BPL, Monolit, and Ambersorb-572) have been examined by nitrogen adsorption at 77.5 K. A method for adsorption potential distribution calculation has been proposed based on the adsorption isotherms. This distribution provides information about possible changes in the Gibbs free energy caused by the energetic and geometrical heterogeneities of an activated carbon as well as by the adsorbate-related entropic effects. The general character of the adsorption potential distribution is clearly visible by its simple relation to the micropore and mesopore distribution. |
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| Keywords: | Adsorption isotherms Adsorption potential distributions Micropore Structure Structural heterogeneity |
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