Correlation of zeolite ZSM-5 acid strength with catalytic activity and selectivity. Final report. [Cobalt and cobalt/thorium impregnated H-ZSM-5]
Isosteric heats of ammonia adsorption were determined for several cobalt and cobalt/thorium impregnated H-ZSM-5. Samples were impregnated to the 3, 6 and 9 wt % levels using an incipient wetness technique and either acetone or water for dissolving the metal nitrate salt. The metal impregnation resulted in a lowering of the maximum heat of ammonia adsorption and in a corresponding lowering of the maximum acid site strength. The ammonia adsorption capacity and adsorption heat was unaltered by a reduction of the metal-impregnated samples in hydrogen, indicating that the incipient wetness method leads to cobalt which was most likely ion-exchanged into the zeolite rather than impregnated into the sieve in a reducable form. In addition, the impregnated cobalt caused a slight steric hinderance to the diffusion of n-butane into the metal-loaded zeolite. The use of either water or acetone for dissolving the metal nitrate salt altered the acid-strength distribution. Water was found to lower the acid-site strength to a greater degree than the acetone. 11 references, 8 figures.
- Research Organization:
- Cleveland State Univ., OH (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- AC22-82PC51258
- OSTI ID:
- 6057122
- Report Number(s):
- DOE/PC/51258-T1; ON: DE85005415
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
10 SYNTHETIC FUELS
AMMONIA
ADSORPTION HEAT
CATALYTIC EFFECTS
CATALYSTS
PH VALUE
SPECIFICITY
COBALT
SORPTIVE PROPERTIES
FISCHER-TROPSCH SYNTHESIS
THORIUM
ZEOLITES
ACETONE
CORRELATIONS
EXPERIMENTAL DATA
IMPREGNATION
PROMOTERS
RESEARCH PROGRAMS
WASHING
WATER
ACTINIDES
CHEMICAL REACTIONS
CLEANING
DATA
ELEMENTS
ENTHALPY
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KETONES
MATERIALS
METALS
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
090121 - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)