Preparation and benzene hydrogenation activity of supported molybdenum carbide catalysts

Alumina-supported molybdenum carbide catalysts have been prepared from Mo0 3/A l2O 3 by (i) reduction with H2 followed by carburization, (ii) direct carburization with CH 4/H 2, and (iii) nitriding with NH 3 followed by carburization. The temperature required for the complete reduction Of MoO3/A1 2O...

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Bibliographic Details
Published in:Journal of catalysis 1991-03, Vol.128 (1), p.126-136
Main Authors: Lee, Jae S., Yeom, Mi H., Park, Ki.Y., Nam, In-Sik, Chung, Jong S., Kim, Young G., Moon, Sang H.
Format: Article
Language:English
Subjects:
02 PETROLEUM
020400 - Petroleum- Processing
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIA
AROMATICS
BENZENE
CARBIDES
CARBON COMPOUNDS
CARBURIZATION
Catalysis
CATALYST SUPPORTS
CATALYSTS
Catalysts: preparations and properties
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
Chemistry
COHERENT SCATTERING
COMPARATIVE EVALUATIONS
CONTROL
DIFFRACTION
ELEMENTS
Exact sciences and technology
General and physical chemistry
HARDENING
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGENATION
MASS SPECTROSCOPY
METALS
METHANE
MOLYBDENUM
MOLYBDENUM CARBIDES
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NITRIDATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
REDUCTION
REFRACTORY METAL COMPOUNDS
RUTHENIUM
SCATTERING
SPECTROSCOPY
SURFACE HARDENING
SURFACE TREATMENTS
SYNTHESIS
TEMPERATURE CONTROL
TEMPERATURE DEPENDENCE
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION
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Summary:Alumina-supported molybdenum carbide catalysts have been prepared from Mo0 3/A l2O 3 by (i) reduction with H2 followed by carburization, (ii) direct carburization with CH 4/H 2, and (iii) nitriding with NH 3 followed by carburization. The temperature required for the complete reduction Of MoO3/A1 2O 3 depended strongly on the reductant employed. Temperature-programmed reduction coupled with on-line mass spectrometry and X-ray diffraction revealed reactions involved in the reduction and carburization of Mo0 3. The supported molybdenum carbide catalysts exhibited high catalytic activity in benzene hydrogenation comparable to those of Pt or Ru. Complete reduction of molybdenum was essential for the high activity. Metallic molybdenum was much less active and less stable than its carbides, probably due to too strong adsorption of benzene.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(91)90072-C