TY - DATA T1 - Optimization of the Catalytic Chemical Vapor Deposition Synthesis of Multiwall Carbon Nanotubes on FeCo(Ni)/SiO2 Aerogel Catalysts by Statistical Design of Experiments PY - 2011/04/07 AU - László Vanyorek AU - Danilo Loche AU - Hajnalka Katona AU - Maria Francesca Casula AU - Anna Corrias AU - Zoltán Kónya AU - Ákos Kukovecz AU - Imre Kiricsi UR - https://acs.figshare.com/articles/journal_contribution/Optimization_of_the_Catalytic_Chemical_Vapor_Deposition_Synthesis_of_Multiwall_Carbon_Nanotubes_on_FeCo_Ni_SiO_sub_2_sub_Aerogel_Catalysts_by_Statistical_Design_of_Experiments/2667553 DO - 10.1021/jp111860x.s001 L4 - https://ndownloader.figshare.com/files/4329940 KW - test 19 KW - testing 27 catalysts KW - multiwall carbon nanotubes KW - Co loading KW - factorial design KW - DOE KW - Fe KW - Statistical Design KW - chemical vapor deposition synthesis KW - C 2H flow rate KW - 49 reactions KW - Catalytic Chemical Vapor Deposition Synthesis KW - carbon source space velocity KW - ExperimentsWe report KW - Multiwall Carbon Nanotubes KW - optimized KW - Ni loading KW - variable KW - MWCNT synthesis KW - transition metal SiO 2 nanocomposite aerogels N2 - 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. ER -