Optimization of the catalytic chemical vapor deposition synthesis of multiwall carbon nanotubes on FeCo(Ni)/SiO2 aerogel catalysts by statistical design of experiments

László Vanyorek, Danilo Loche, Hajnalka Katona, Maria Francesca Casula, Anna Corrias, Z. Kónya, Á. Kukovecz, I. Kiricsi

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We report on optimizing the catalytic chemical vapor deposition synthesis of multiwall carbon nanotubes (MWCNTs) from ethene over supported transition metal SiO2 nanocomposite aerogels using the statistical design of experiments (DOE) approach. DOE allowed us to test 19 different catalysts in a total of 49 reactions instead of testing 27 catalysts in 729 runs as required by a three-level full factorial design. Both catalyst-related and process-related variables were optimized; in particular varied parameters were Fe + Co loading, Fe/Co ratio, Ni loading, C2H4 flow rate, temperature, and duration of the reaction. The results of the optimization indicate that a good catalyst should contain a high overall loading (10 wt %) of iron and cobalt in similar amount, should be free of nickel and should be operated at a relatively low temperature (650-700 °C) at high carbon source space velocity for optimum performance. The uniqueness of this work is that we demonstrated that catalyst-related and process-related variables can be optimized simultaneously in the DOE of MWCNT synthesis.

Original languageEnglish
Pages (from-to)5894-5902
Number of pages9
JournalJournal of Physical Chemistry C
Volume115
Issue number13
DOIs
Publication statusPublished - Apr 7 2011

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Carbon Nanotubes
Aerogels
experiment design
aerogels
Design of experiments
Chemical vapor deposition
Carbon nanotubes
carbon nanotubes
vapor deposition
catalysts
Catalysts
optimization
synthesis
factorial design
loading rate
uniqueness
Cobalt
Nickel
Transition metals
Nanocomposites

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Optimization of the catalytic chemical vapor deposition synthesis of multiwall carbon nanotubes on FeCo(Ni)/SiO2 aerogel catalysts by statistical design of experiments. / Vanyorek, László; Loche, Danilo; Katona, Hajnalka; Casula, Maria Francesca; Corrias, Anna; Kónya, Z.; Kukovecz, Á.; Kiricsi, I.

In: Journal of Physical Chemistry C, Vol. 115, No. 13, 07.04.2011, p. 5894-5902.

Research output: Contribution to journalArticle

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