4.7 Article Proceedings Paper

Hydrogen adsorption characteristics of activated carbon

期刊

CATALYSIS TODAY
卷 120, 期 3-4, 页码 399-406

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ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2006.09.012

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hydrogen; storage; carbon; adsorption; porosity

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Hydrogen adsorption on activated carbons was investigated in the present works up to 100 bars at 298 K. Coconut-shell was activated by potassium hydroxide, resulting in activated carbons with different porosities. All of prepared activated carbons are microporous and show the same adsorption properties. The complete reversibility and fast kinetics of hydrogen adsorption show that most of adsorbed quantity is due to physical adsorption. A linear relationship between hydrogen adsorption capacity and pressure is obtained for the all samples regardless of their porosities. Hydrogen adsorption capacities are linear function of porosities such as specific surface area, micropore surface area, total pore volume, and micropore volume. The maximum hydrogen adsorption capacity of 0.85 wt.% at 100 bars, 298 K is obtained in these materials. (c) 2006 Elsevier B.V. All rights reserved.

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