Partial oxidation of ethane over silica-supported alkali metal molybdate catalysts
- Univ. of Szeged (Hungary)
The partial oxidation of ethane has been investigated on silica-supported M[sub 2]MoO[sub 4] catalysts (M = Li, Na, K, Rb, Cs) in a fixed-bed continuous-flow reactor at 770-823 K using N[sub 2]O as oxidant. Additional measurements included pulse experiments, temperature-programmed reduction of the catalysts, and a study of the catalytic decomposition of N[sub 2]O and C[sub 2]H[sub 5]OH. The numbers of acidic and basic sites have also been determined. Temperature-programmed reduction of the alkali metal molybdates showed that the onset temperature of the reduction decreased from Li to Cs, while the extent of the reduction increased in this sequence. The main products of the oxidation reaction were ethylene, acetaldehyde, CO, and CO[sub 2]. Small amounts of CH[sub 4] and C[sub 2]H[sub 5]OH were also identified. The ethane conversion and the rate of the C[sub 2]H[sub 4] and CH[sub 3]CHO formation all increased from Li to Cs. Detailed kinetic measurements were carried out on K[sub 2]MoO[sub 4]/SiO[sub 2]. The activation energy of the ethane consumption was 71 kJ/mol. A possible mechanism for the oxidation reaction is discussed.
- OSTI ID:
- 6938939
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 135:2; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ACETALDEHYDE
ACTIVATION ENERGY
ALCOHOLS
ALDEHYDES
ALKALI METAL COMPOUNDS
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CESIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
ENERGY
ETHANE
ETHANOL
ETHYLENE
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
LITHIUM COMPOUNDS
METHANE
MOLYBDATES
MOLYBDENUM COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POTASSIUM COMPOUNDS
REACTION KINETICS
REDUCTION
REFRACTORY METAL COMPOUNDS
RUBIDIUM COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SURFACE PROPERTIES
SYNTHESIS
TEMPERATURE CONTROL
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TRANSITION ELEMENT COMPOUNDS