Reactions of n-hexane and methylcyclopentane over dispersed cobalt-rhodium catalysts: synergism in catalysis by alloys

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · Ind. Eng. Chem., Prod. Res. Dev.; (United States)

DOI:https://doi.org/10.1021/i360067a004· OSTI ID:6971170

Anderson, J R ^[1]; Mainwaring, D E

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1. Univ. Melbourne

Hydrogenolysis, isomerization, and dehydrocyclization reactions of n-hexane and methylcyclopentane over dispersed Co-Rh catalysts prepared from Co/sub 2/Rh/sub 2/(CO)/sub 12/ (1) or by conventional impregnation (2) were studied in a stainless steel, continuous differential flow reactor, at 2.9 atm and 493/sup 0/-583/sup 0/K, with 6.9:1 hydrogen-to-hydrocarbon ratio. The catalysts were 1Vertical Bar3< by wt metal on either Degussa Aerosil 200 (A) or ..gamma..-alumina (B). All the catalysts tested showed lower hydrogenolysis selectivity than either Co or Rh alone. Normal hexane reacted to give significant, and at lower temperatures, dominant amounts of dehydrocyclization and isomerization products. Catalyst 1B, which had the smallest metallic particle size and the surface richest in Rh, gave the greatest hydrogenolysis selectivity. Methylcyclopentane gave only ring opening at the lowest temperature; at increasing temperatures, ring opening became increasingly positionally nonselective, and hydrogenolysis selectivity (C/sub 1/-C/sub 5/ products) increased.

• OSTI ID: 6971170
• Journal Information: Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 17:3; ISSN IEPRA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
400301* -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALKANES
ALLOYS
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CYCLOALKANES
HEXANE
HYDROCARBONS
KINETICS
ORGANIC COMPOUNDS
REACTION KINETICS
TEMPERATURE EFFECTS
TESTING