CNTs growth on reduced iron. (2021)

• Record Type: Journal Article
• Authors: Kotov, V.; Sviatenko, A.; Nebesnyi, A.; Filonenko, D.; Khovavko, A.; Bondarenko, B.
• Is Part Of: Materials today. Volume 35:Part 4(2021)
• Page Start: 616
• Page End: 620
• Publication Date: 2021
• Subjects: Carbon nanotubes -- Reduced iron -- Converted natural gas -- Carbon monoxide -- Carbon cuff; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2019.11.287
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The mechanism of CNTs growth on iron catalyst is considered. Process occurs under conditions of low-temperature carbon monoxide disproportionation. Products of natural gas air conversion serve as a source of carbon monoxide. A highly dispersed structure of iron in the form of a chaotic accumulation of its particles is formed in terms of low-temperature reduction. The boundaries of contact of particles have the highest catalytic activity, where the nucleation of a new phase occurs in the form of ring-shaped cuffs due to emitted carbon while carbon monoxide decomposes. The optimum temperature regime for considered process lies in the range of 600–650 °C.