Journal ArticleDOI
The formation of filamentous carbon on iron and nickel catalysts : I. Thermodynamics
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In this article, the thermodynamic properties of filamentous carbon formed from CO and CH4 on iron and nickel catalysts have been determined in the temperature range 650-1000 K. The presence of carbide intermediates has been demonstrated both by magnetic measurements and by temperature-programmed hydrogenation.About:
This article is published in Journal of Catalysis.The article was published on 1985-12-01. It has received 163 citations till now. The article focuses on the topics: Filamentous carbon & Compounds of carbon.read more
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Carbon Nanofibers: Catalytic Synthesis and Applications
Krijn P. de Jong,John W. Geus +1 more
TL;DR: A review on the growth of nanofibers using metallic particles as a catalyst to precipitate the graphitic carbon can be found in this paper, where the authors summarize some of the earlier literature that has contributed greatly to understand the nucleation and growth of carbon carbon and nanotubes and describe in detail recent progress to control the fiber surface structure, texture, and growth into mechanically strong agglomerates.
Journal ArticleDOI
Filamentous carbon formation and gasification: Thermodynamics, driving force, nucleation, and steady-state growth
TL;DR: In this article, a detailed description of the formation and the gasification of filamentous carbon is given, and a thermodynamic basis for the different solubilities is provided, where the segregation of carbon, taking place at the gas side of the nickel particle is added as one of the steps in the global mechanism of carbon filament formation and gasification.
Journal ArticleDOI
Methane decomposition to COx-free hydrogen and nano-carbon material on group 8–10 base metal catalysts: A review
TL;DR: In this paper, a review of the recent advances in the reaction mechanism and kinetics on group 8-10 base metal catalysts is presented, with special attention paid to the roles of metal particles and the deactivation mechanism of the catalyst during the reaction.
Journal ArticleDOI
Effect of supports and Ni crystal size on carbon formation and sintering during steam methane reforming
TL;DR: In this article, the authors used the tapered element oscillating microbalance (TEOM) to study catalysts supported on hydrotalcite derived materials for steam reforming.
Journal ArticleDOI
Review of methane catalytic cracking for hydrogen production
TL;DR: In this article, the authors discuss the catalysts that can be used for methane cracking, and their deactivation and regeneration are discussed, including carbon filament formation, the reaction mechanisms, and the models available in the literature for predicting reaction rates.
References
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Book
Thermochemical properties of inorganic substances
Ihsan Barin,Ottmar Knacke +1 more
TL;DR: In this paper, a volume of tables conveying the thermochemical parameters of more than 2000 substances, cover enthalpy, entropy, chemical potential and Planck's function, and commentaries on the chemical reactions of the relevant component and indications of stability/metastability.
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Carbon Deposition in Steam Reforming and Methanation
TL;DR: In this article, the authors investigated the causes of deactivation of supported metal catalysts by carbon or coke formation, and found that deactivation can occur due to fouling of the metal surface, blockage of catalysts pores and voids, and actual physical disintegration of the catalyst support.
Journal ArticleDOI
Mechanisms of carbon formation on nickel-containing catalysts.
TL;DR: A complex dependence of rate upon temperature is observed in many systems and different explanations for the existence of a rate maximum and an apparent negative activation energy are discussed in this paper, although other effects may influence the magnitude of the observed activation energy.
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The Formation and Removal of Coke from Nickel Catalyst
TL;DR: In this paper, the authors focus on the conversion of energy-producing feedstocks from a less to a more desirable form, such as coal gasification, steam reforming, or hydrogasification.
Journal ArticleDOI
Hydrogenation of surface carbon on alumina-supported nickel
Jon G. McCarty,Henry Wise +1 more
TL;DR: In this article, four types of carbon were observed to form on an alumina-supported nickel methanation catalyst on exposure to carbon monoxide at 550 ± 50 K. In order of their reactivity toward hydrogen, the carbon species may be classified as: chemisorbed carbon atoms (α), bulk nickel carbide, amorphous carbon (β), and crystalline elemental carbon.