The sorption of butanes over carbon nanotubes

Zs Ötvös, G. Onyestyák, J. Valyon, I. Kiricsi, L. V C Rees

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Single- and multi-walled carbon nanotubes (SWCNT and MWCNT) were synthesized by the catalytic decomposition of methane and acetylene, respectively. The catalyst/carbon mixtures were submitted to various procedures to obtain samples, enriched in nanotubes. Adsorption isotherms and gas sorption frequency response (FR) spectra of butanes were determined between 273 and 373 K at different equilibrium pressures in the 1 - 6 kPa range. The adsorption capacities were found to increase with increasing (i) carbon nanotube content, (ii) available surface area, and (iii) concentration of O-containing surface functional groups that are sites for strong butane adsorption. The FR studies demonstrated that the rate-governing mechanism of butane sorption depends both on the morphology and the surface properties of the nanotubes. The FR method was shown to be a powerful technique for the characterization of the carbon nanotube products.

Original languageEnglish
Pages (from-to)617-624
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume156
Publication statusPublished - 2005

Fingerprint

Butanes
Carbon Nanotubes
Butane
butanes
sorption
frequency response
Frequency response
Sorption
Carbon nanotubes
carbon nanotubes
Nanotubes
adsorption
nanotubes
Adsorption
Acetylene
Methane
Adsorption isotherms
acetylene
surface properties
Functional groups

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

The sorption of butanes over carbon nanotubes. / Ötvös, Zs; Onyestyák, G.; Valyon, J.; Kiricsi, I.; Rees, L. V C.

In: Studies in Surface Science and Catalysis, Vol. 156, 2005, p. 617-624.

Research output: Contribution to journalArticle

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