Reversibility of filamentous carbon growth and gasification

Journal Article · Tue Mar 01 04:00:00 EST 1988 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(88)90303-X· OSTI ID:5370246

Figueiredo, J L; Bernardo, C A; Chludzinski, Jr, J J; Baker, R T.K.

Controlled atmosphere electron microscopy observations of the nickel-catalyzed growth and gasification of carbon filaments have shown that these processes can be reversed. This supports the view that growth and gasification in either hydrogen or steam occur by similar mechanisms, where one of the steps involves the diffusion of carbon through the metal. It was observed that the small catalyst particles are the most active in filament formation and steam gasification, while the large particles are the most active for the hydrogenation reaction. This is explained in terms of different rate-controlling steps.

• Research Organization: CEQ, Porto (Portugal)
• OSTI ID: 5370246
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 110:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CARBON
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL GASIFICATION
ELECTRON MICROSCOPY
ELEMENTS
FIBERS
GASIFICATION
HYDROGEN
HYDROGENATION
KINETICS
METALS
MICROSCOPY
NICKEL
NONMETALS
PARTICLE SIZE
REACTION KINETICS
SIZE
STEAM
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS