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A Model for Catalytic Synthesis of Carbon Nanotubes in a Fluidized-Bed Reactor: Effect of Reaction Heat Full article

Conference XXII International Conference on Chemical Reactors
19-23 Sep 2016 , London
Journal Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212
Output data Year: 2017, Volume: 329, Pages: 305-311 Pages count : 7 DOI: 10.1016/j.cej.2017.06.001
Tags Catalysis kinetics, Catalytic synthesis, Fluidized-bed reactor, Heat of reaction, Multi-walled carbon nanotubes (MWCNT)
Authors Rabinovich Oscar 1 , Tsytsenka (Blinova) Alla 1 , Kuznetsov Vladimir 2,3 , Moseenkov Sergei 2 , Krasnikov Dmitry 2,3
Affiliations
1 A.V. Luikov Heat and Mass Transfer Institute, NAS of Belarus, Minsk, Belarus
2 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
3 Novosibirsk State University, Novosibirsk, Russia

Funding (2)

1 Russian Foundation for Basic Research 16-53-00146
2 Belarusian Republican Foundation for Fundamental Research Т16Р-088

Abstract: In the present study, we have developed a mathematic model describing quasi-continuous catalytic synthesis of multi-walled carbon nanotubes (MWCNTs) in a fluidized bed (FB) reactor. The special attention has been paid to the effects related to heat release or absorption during MWCNT synthesis. The heat of the reaction for MWCNT growth has been shown to significantly affect the thermal field in the reactor with the diameter as low as 6 cm. We attribute this to the extremely low thermal conductivity of aerogel-like MWCNT agglomerates (0.5-0.7 W/(m⋅K)), the basic units of the fluidized bed. According to the proposed model, the overheating up to 60 degrees takes place in the reactor with the diameter of D = 18 cm, the wall temperature of 943 K, and blown by 1:1 C2H4/Ar mixture. We have observed major changes caused by overheating: the activity of the catalyst and morphological properties of the produced MWCNTs (outer diameter, the structure of the walls, and fraction of impurities). The role of these thermal effects rises dramatically with increasing the reactor size and should be taken into account when designing reactors for large-scale production of MWCNTs.
Cite: Rabinovich O. , Tsytsenka (Blinova) A. , Kuznetsov V. , Moseenkov S. , Krasnikov D.
A Model for Catalytic Synthesis of Carbon Nanotubes in a Fluidized-Bed Reactor: Effect of Reaction Heat
Chemical Engineering Journal. 2017. V.329. P.305-311. DOI: 10.1016/j.cej.2017.06.001 WOS Scopus РИНЦ AN OpenAlex
Dates:
Published online: Jun 2, 2017
Published print: Dec 1, 2017
Identifiers:
Web of science: WOS:000410765700030
Scopus: 2-s2.0-85021108635
Elibrary: 31022453
Chemical Abstracts: 2017:1057825
OpenAlex: W2620617563
Citing:
DB Citing
Web of science 16
Scopus 19
Elibrary 18
OpenAlex 17
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