Synthesis of carbon nanotubes by catalytic conversion of methane: Competition between active components of catalyst

Мордкович, В. З.; Dolgova, E.A.; Karaeva, Aida R.; Kharitonov, D. N.; Maslov, I. A.; Kamenev, A. A.; Tretjakov, V.F.

doi:10.1016/j.carbon.2006.08.006

Cited by 39 publications

(25 citation statements)

References 17 publications

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“…The CNTs with crooked and entangled shape could be found on both materials and all had the length in the order of micro. The morphology of the MWCNTs is similar to those reported elsewhere 17. After the reaction in CH 4…”

supporting

confidence: 53%

A-site deficient chromite perovskite with in situ exsolution of nano-Fe: a promising bi-functional catalyst bridging the growth of CNTs and SOFCs

Sun

Wang

et al. 2015

J. Mater. Chem. A

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supporting

confidence: 53%

A-site deficient chromite perovskite with in situ exsolution of nano-Fe: a promising bi-functional catalyst bridging the growth of CNTs and SOFCs

Sun

Wang

et al. 2015

J. Mater. Chem. A

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“…For example, between 450°C and 650°C, steel is transformed into cementite (Fe 3 C), which presents no catalytic effect in the hydrocarbon pyrolysis [54]. Polishing a surface favours the presence of Chromium atoms on the surface, which increases the catalytic activity of the tube [55].…”

Section: Characterisation Of Coke Deposit On Chemical Reactors Of Varmentioning

confidence: 99%

Characterisation of coking activity during supercritical hydrocarbon pyrolysis

Gascoin¹,

Gillard²,

Bernard³

et al. 2008

Fuel Processing Technology

104

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The active cooling of the Supersonic Combustion Ramjet engine, for hypersonic flight purpose, is ensured thanks to fuel, n-dodecane for the present study. The endothermic fuel pyrolysis, starting above 800 K, could generate an unwanted coke formation. Experimental tests up to 1125 K and between 1 MPa and 6 MPa have been performed on the hydrocarbon fuel pyrolysis to evaluate the coking activity. 316L stainless steel, low carbon steel and titanium reactors have been considered. A witness of the coke formation, based on its thermal insulation and pressure loss effects, has been found. A correlation between methane production and coke deposit was found. The coke has been studied with Scanning Electron Microscope (SEM), Energy Dispersion Spectroscopy (EDS), X-ray diffractometer and Fourier Transform Infrared (FTIR) spectroscopy. The porosity, the density and the permeability of the coke have been estimated.

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“…It has been established that the process of filamentary carbon formation on the 20Cr 25Ni steel of relevance here is catalysed by Ni or Ni-rich metallic particles of the order of 10 s of nanometre in size, [6][7][8][9]. The size and the composition of the particles are crucial parameters [7][8][9][10][11][12][13]. Powders, of controlled composition and size range, have been used to demonstrate and quantify the reactions occurring under a variety of depositing and non-depositing conditions [3,10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Temperature and Carbonyl Sulphide on Carbon Deposition on 20Cr25Ni Stainless Steel

et al. 2017

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In this paper, the results of a systematic study of the effect of temperature and COS concentration on the formation of carbon deposits on a 20Cr25Ni austenitic stainless steel under a depositing gas of 1000 vppm ethene in 1%CO/CO 2 have been presented. Carbon deposits were found over the temperature range of 550-725°C after 4 h exposure. COS additions to the ethene-bearing gas inhibited 123Oxid Met (2017) 87:667-678 DOI 10.1007 the deposition process, but the effect was concentration and temperature dependent. The results have been interpreted in terms of the oxidation process and the adsorption of sulphur on the catalytic Ni-rich particles.

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Synthesis of carbon nanotubes by catalytic conversion of methane: Competition between active components of catalyst

Cited by 39 publications

References 17 publications

A-site deficient chromite perovskite with in situ exsolution of nano-Fe: a promising bi-functional catalyst bridging the growth of CNTs and SOFCs

A-site deficient chromite perovskite with in situ exsolution of nano-Fe: a promising bi-functional catalyst bridging the growth of CNTs and SOFCs

Characterisation of coking activity during supercritical hydrocarbon pyrolysis

The Effect of Temperature and Carbonyl Sulphide on Carbon Deposition on 20Cr25Ni Stainless Steel

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