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Molecules 2016, 21(4), 521; doi:10.3390/molecules21040521

Sorption Kinetics on Open Carbon Nanohorn Aggregates: The Effect of Molecular Diameter

1
Department of Physics, Southern Illinois University, Carbondale, IL 62901, USA
2
Department of Physics & Astronomy, University of Denver, Denver, CO 80208-6900, USA
3
National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8565, Japan
4
Graduate School of Science and Technology, Meijo University, Shiogamaguchi, Tempaku, Nagoya 468-8502, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Saikat Talapatra
Received: 8 March 2016 / Revised: 10 April 2016 / Accepted: 15 April 2016 / Published: 21 April 2016
(This article belongs to the Special Issue Carbon Nanotubes: Advances and Applications)
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Abstract

We present the results of a study of the kinetics of adsorption on aggregates of open carbon nanohorns using argon and CF4 sorbates. We measured the equilibration times for each value of the sorbent loading along eight adsorption isotherms (four isotherms for each sorbate species). We found that: the equilibration times decrease as the sorbent loading (and the equilibrium pressure of the coexisting gas) increases, for a given temperature; and, that, for a given value of the sorbent loading, the equilibration times decrease with increasing temperature. When considering the effect of scaling of the temperatures by the respective critical temperatures we found that, at the same scaled temperature and at comparable loadings, the equilibration times for CF4 were longer than those for argon. We discuss a possible explanation for this result. View Full-Text
Keywords: adsorption; sorption; kinetics of adsorption; Carbon Nanohorns; adsorption isotherm; linear driving force model adsorption; sorption; kinetics of adsorption; Carbon Nanohorns; adsorption isotherm; linear driving force model
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Russell, B.A.; Khanal, P.; Calbi, M.M.; Yudasaka, M.; Iijima, S.; Migone, A.D. Sorption Kinetics on Open Carbon Nanohorn Aggregates: The Effect of Molecular Diameter. Molecules 2016, 21, 521.

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