Gallosilicate molecular sieves: the role of framework and nonframework gallium on catalytic cracking activity
Journal Article
·
· J. Catal.; (United States)
The acid properties of a molecular sieve zeolite can be modified by changing the SiO/sub 2//Al/sub 2/O/sub 3/ ratio or through isomorphous substitution, e.g., replacement of aluminum in the tetrahedral framework sites. Numerous examples of gallosilicates (isomorphous substitution of gallium for aluminum) have been reported. However, little is known of the ability of these materials to act as acid catalysts in the catalytic cracking of hydrocarbons. In addition, gallium oxide itself may be catalytically active. It is therefore important to understand the role a secondary phase or impurity of gallium oxide would have on the apparent acid activity of a gallosilicate containing such an impurity or secondary phase. This paper presents the results of n-butane cracking studies with the gallosilicate analog of zeolite ZSM-5, i.e., (Ga) ZSM-5, and a hydrothermally modified gallosilicate ZSM-5 material containing nonframework gallium.
- Research Organization:
- Georgia Institute of Technology, Atlanta (USA)
- OSTI ID:
- 5269455
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 106:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
ADSORBENTS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTANE
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
GALLIUM
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIAL SUBSTITUTION
MATERIALS
METALS
MINERALS
MOLECULAR SIEVES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
THERMOCHEMICAL PROCESSES
ZEOLITES
020400* -- Petroleum-- Processing
ADSORBENTS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BUTANE
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
GALLIUM
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIAL SUBSTITUTION
MATERIALS
METALS
MINERALS
MOLECULAR SIEVES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
THERMOCHEMICAL PROCESSES
ZEOLITES