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

Vanyorek, L. and Loche, D. and Katona, H. and Casula, M.F. and Corrias, A. and Kónya, Z. and Kukovecz, A. and Kiricsi, I. (2011) Optimization of the catalytic chemical vapor deposition synthesis of multiwall carbon nanotubes on FeCo(Ni)/SiO2 aerogel catalysts by statistical design of experiments. Journal of Physical Chemistry C, 115 (13). pp. 5894-5902. ISSN 1932-7447. (doi:https://doi.org/10.1021/jp111860x) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1021/jp111860x

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.

Item Type: Article
Uncontrolled keywords: Carbon source, Catalytic chemical vapor deposition, Co loading, Full factorial design, Low temperatures, Multi-Wall Carbon Nanotubes, Ni loading, Optimum performance, Related variables, Statistical design of experiments, Three-level, Varied parameters, Aerogels, Carbon nanotubes, Catalysts, Chemical vapor deposition, Cobalt, Design of experiments, Ethylene, Loading, Multiwalled carbon nanotubes (MWCN), Nanocomposites, Optimization, Silicon compounds, Synthesis (chemical)
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 11:39 UTC
Last Modified: 04 Dec 2017 12:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46206 (The current URI for this page, for reference purposes)
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