Superactivated carbon

Hydrogen storage in carbon has been considered during the last few years on account of the existence of new carbon nanomaterials, such as fullerenes, superactivated carbons, carbon monoliths, carbon nanotubes, and carbon nanohoms [147,166,176-179], distinguished by their high adsorption capacities, hydrophobic nature, and high adsorption/desorption rates [170],... 

Zhou, L., Zhou, Y.-P., Sun, Y. (2003) A comparative study of hydrogen adsorption on superactivated carbon versus carbon nanotubes, Proc. VIII Int. Conf. Hydrogen Material Science and Chemistry of Carbon Nanomaterials , 768-779. 

Application of the Os Method for Analysing Benzene, Dichloromethane and Methanol Isotherms Determined on Molecular Sieve and Superactivated Carbons... 

Reference data for the adsorption of benzene, dichloromethane and methanol have been used to construct as plots for the adsorption of these vapoius on Carbosieve, Takeda molecular sieve carbons, Maxsorb superactivated carbons and a charcoal cloth. It is shown that the as method can give satisfactory results when applied to organic adsorptives provided that good quality adsorption data at higher pressures is available. It is also shown how analysis of the as plots can lead to useful information about the pore structure of the different types of carbon, and some of the difficulties associated with the use of nitrogen adsorption at 77K for the characterisation of microporous carbons are discussed. 

We are currently in the process of publishing reference data for various adsorptive molecules of different size and polarity which we hope other research groups will be able to evaluate. In this paper, we will present a summary of some of the results obtained with benzene, dichloromethane and methanol, and show how application of the reference data can be used to obtain useful information about the pore structure of molecular sieve carbons and superactivated carbons. 

Analysis of the as plots can be used to obtain useful information concerning the pore (or pore entrance) size and distribution of commercial molecular sieve and superactivated carbons. A more complete characterisation of some of the sanq)les would require the use of larger molecules than those used here. Reference data for the adsorption of neopentane has already been published [9] and this would appear to be the best choice for extending the range of molecular size in future work. 

Application of the a, method for analysing benzene, dichloromethane and methanol isotherms determined on molecular sieve and superactivated carbons... 

Superactivated carbons (organic chemicals metal ions)... 

L. Zhou, S. P. Bai, W. Su, J. Yang, Y. P. Zhou. Conparative Study of the Excess versus Absolute Adsorption of CO2 on Superactivated Carbon for the Near-Critical Region. Langmuir. 19 (2003) 2683-2690. 

FIGURE 5.17 H2 adsorbed of K-doped superactivated carbon, K-doped graphite, superactivated carbon and graphite as a function of time. 

Sevilla, M., Fuertes, A., Mokaya, R., 2011. High density hydrogen storage in superactivated carbons from hydrothermaUy carbonized renewable organic materials. Energy Environmental Science 4 (4), 1400—1410. 

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