Importance of sequence of impregnation in the activity development of alkali-promoted Mo catalysts for alcohol synthesis from CO-H/sub 2/
The selective production of C/sub 2//sup +/ alcohols from CO and H/sub 2/ is of both commercial and academic interest in C/sub 1/ chemistry. The alcohol mixtures can be used as additives in gasoline to enhance the octane number. There are a number of reports on the catalysts for the synthesis of light alcohols. Synthesis of alcohols on molybdenum-based catalysts, however, was not reported until the authors discovery that mixed alcohols were efficiently produced from CO and H/sub 2/ on alkali-promoted molybdenum catalysts. Other interesting features of Mo catalysts were that they operated well in a CO-rich gas and are resistant to sulfur poisoning. In the initial study in this laboratory, catalysts were prepared by coimpregnation of SiO/sub 2/ with KCl and Mo salts. As the Mo loading was decreased, however, the authors encountered a difficulty in preparing the catalyst with good reproducibility. Hence they have employed different preparations for the Mo-K/SiO/sub 2/ catalysts. In this note they report that sequence of impregnation greatly affects the activity and selectivity. A sequence in which the K is added first, followed by impregnation with (NH/sub 4/)/sub 6/Mo/sub 7/O/sub 24/, gives rise to reproducible preparation of catalysts for alcohol production. 26 references.
- Research Organization:
- Univ. of Tokyo, Japan
- OSTI ID:
- 5539493
- Journal Information:
- J. Catal.; (United States), Vol. 101:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
ALCOHOLS
SYNTHESIS
CARBON MONOXIDE
METHANATION
CATALYSTS
CHEMICAL PREPARATION
ADDITIVES
GASOLINE
HYDROGENATION
IMPREGNATION
POTASSIUM
PROMOTERS
SCHEDULES
ALKALI METALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FUELS
HYDROXY COMPOUNDS
LIQUID FUELS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)
090221 - Alcohol Fuels- Chemical Synthesis- (1976-1989)