The sorption of butanes over carbon nanotubes

Zs Ötvös, Gy 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
DOIs
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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