Kinetics of Carbon Multi-wall Nanotube Synthesis by Catalytic Pyrolysis of Methane |
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| Authors: | Edward G Rakov Igor G Ivanov Sergey N Blinov Nikolai V Kazakov Valery V Skudin Nikolai G Digurov Anna K Bogdanovich |
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| Affiliation: |
a Department of Nanotechnology, D.I. Mendeleev University of Chemical Technology of Russia, Moscow, Russia |
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| Abstract: | By method of isothermal gravimetry at 600-700°C, CH4 concentration 32-100% in Ar and 91-100% in H2 under atmospheric pressure the kinetics of CH4 pyrolysis under Ni/La2O3 catalysts is studied. Estimated apparent activation energy of reaction is 73 kJ/mol for fresh catalyst and 71 kJ/mol for aged one. The reaction order on CH4 changes from 1.05 at 600°C to 1.3 at 700°C. The influence of H2 concentration on the reaction rate is more complicated. On the basis of kinetics measurements continuously working laboratory-scale reactor with gas and catalyst counter-flow is constructed and tested. |
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| Keywords: | Nanotubes Nanofibers Methane Catalytic pyrolysis |
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