Carbon monoxide and carbon dioxide hydrogenation catalyzed by supported ruthenium carbonyl clusters: a novel procedure for encapsulating Ru3(Co)12 within the pores of Na-Y zeolite. Technical report No. 1, 1986-1987

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6629505

Hastings, W R; Cameron, C J; Thomas, M J; Baird, M C

Zeolite-supported ruthenium catalysts for the hydrogenation of carbon monoxide and carbon dioxide were prepared by sorbing Ru(CO)5 (molecular diameter 6.3 A) onto Na-Y zeolite and Linde 5A molecular sieve. Although the metal carbonyl is not absorbed into the pores of the molecular sieve (diameter 4.2 A), it is readily absorbed into the pores (diameter 7.4 A) and supercages (diameter 13 A) of the Na-Y zeolite. The Ru(CO)5 in Na-Y coverts in the absence of carbon monoxide to the much larger Ru3(CO)12 (diameter 9.2 A), which remains on the surface of the molecular sieve but is trapped within the supercages of the Na-Y zeolite because it cannot pass through the smaller pores. Slow, temperature-programmed heating of the Ru3(CO)12 in Na-Y to 350 C under a flow of hydrogen results in decarbonylation and formation of a CO hydrogenation catalyst that produces a very atypical (for ruthenium) hydrocarbon distribution truncated at about C10. The unusual product distribution presumably arises because the catalyst sites are situated within the zeolite supercages. Thus the metal is highly dispersed and or the growing hydrocarbon chains are subject to geometrical limitations on their growth. Consistent with this prothesis, ruthenium carbonyl clusters immobilized on the external surfaces of Na-Y zeolite, Linde 5A molecular sieve, and gamma alumina all exhibit typical, nonselective hydrocarbon-product distributions.

• Research Organization: Queen's Univ., Kingston, Ontario (Canada). Dept. of Chemistry
• OSTI ID: 6629505
• Report Number(s): AD-A-199807/9/XAB
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ADSORBENTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYSTS
CHAINS
CHALCOGENIDES
CHEMICAL REACTIONS
DISTRIBUTION
DOCUMENT TYPES
ELEMENTS
GEOMETRY
HYDROCARBONS
HYDROGEN
HYDROGENATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MATHEMATICS
METALS
MINERALS
MOLECULAR SIEVES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PROGRESS REPORT
RUTHENIUM
SURFACES
TRANSITION ELEMENTS
ZEOLITES