Catalytic conversion of alcohols. 5. Selectivity properties of Y/sub 2/O/sub 3/
The ratio (S) of selectivity for dehydration to dehydrogenation on yttrium oxide increased with time-on-stream and with increasing temperature (250/sup 0/-350/sup 0/C), and it was generally higher for cyclic alcohols than for acylic ones. The catalyst was very selective for the formation of 1-alkenes from 2-alkanols (e.g., 4-methyl-2-pentanol yielded 4-methyl-1-pentene with 93.5-96.4% selectivity at 248/sup 0/-340/sup 0/C and up to 255 min on steam). The reactions were zero order in alcohol, and the dehydrogenation reactions had lower activation energies than dehydration reactions; activation energies for the latter reaction were similar to those on alumina. The catalyst was not selective for the conversion of tertiary alcohols to 1-alkenes. Graphs, tables, and 25 references.
- Research Organization:
- Potomac State College, WV
- OSTI ID:
- 5769982
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 52:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Catalytic conversions of alcohols--12. Selectivity of hafnium oxide
Catalytic conversion of alcohols--13. Alkene selectivity with TiO/sub 2/ catalysts
Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEHYDRATION
DEHYDROGENATION
HIGH TEMPERATURE
HYDROCARBONS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES