Promoter modifications of catalytic activity and selectivity. Progress report, April 1, 1982-March 31, 1983

Technical Report · Mon Apr 18 04:00:00 EST 1983

OSTI ID:6461234

Falconer, J L

The influence of alkali promoters on CO hydrogenation was studied as a function of catalyst support (Al/sub 2/O/sub 3/, SiO/sub 2/, SiO/sub 2/.Al/sub 2/O/sub 3/ and TiO/sub 2/). Temperature-programmed reaction was used to study the specific rates of CO and carbon hydrogenation, and temperature-programmed desorption studied the change in H/sub 2/ and CO desorption rates. The role of the support was separately studied for comparison. Specific-activity and product distributions were also studied in a differential reactor with gas-chromatography detection. On all catalysts the selectivity for higher hydrocarbons, particularly olefins, was increased by addition of Na or K promoters. On all catalysts but Ni/SiO/sub 2/.Al/sub 2/O/sub 3/, however, the specific activity decreased; on Ni/SiO/sub 2/.Al/sub 2/O/sub 3/, a slight increase in specific activity was seen. Similarly, significant changes in methanation activation energies were observed for the addition of promoters. Good agreement was obtained between differential reactor studies and temperature-programmed reaction. The role of the promotor is significantly influenced by the oxide support. 12 figures, 4 tables.

• Research Organization: Colorado Univ., Boulder (USA). Dept. of Chemical Engineering
• DOE Contract Number: AC02-82ER12058
• OSTI ID: 6461234
• Report Number(s): DOE/ER/12058-1; ON: DE83010916
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METALS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
DATA
DESORPTION
ELEMENTS
ETHANE
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
INFORMATION
KINETICS
METALS
METHANATION
METHANE
MINERALS
MODIFICATIONS
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
PROMOTERS
PROPANE
REACTION KINETICS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM
SPECIFICITY
TEMPERATURE DEPENDENCE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS