A neutron powder diffraction analysis of potassium-exchanged ferrierite
- The Royal Institution of Great Britain, London (England)
Ferrierite is a versatile catalyst both in hydrocarbon processing and in the petrochemical industry. The H{sup +}-exchanged form of ferrierite has been reported as an efficient catalyst for the hydration of alkenes, the cracking of n-alkanes, and the isomerization of m-xylene to p-xylene. Harrison et al. have noted that its use in methanol conversion gives appreciably lower aromatic selectivity than ZSM-5, probably because the 10-ring windows of ferrierite (0.42 {times} 0.54 nm) are smaller in diameter than those of ZSM-5 (0.53 {times} 0.56 and 0.51 {times} 0.55 nm). Alkali-metal-exchanged zeolites are at present of considerable commercial significance since they are key components of effective catalysts for the aromatization of alkanes, such as n-hexane to benzene. A good example is the K{sup +}-exchange form of zeolite L. The authors considered, therefore, that a sensible test material for a structural investigation of ferrierite would be the K{sup +}-exchanged form of the zeolite. Previously the authors have reported the use of high-temperature X-ray studies of Ni{sup 2+}-exchanged zeolite Y, and a low-temperature neutron diffraction study of La{sup 3+}-exchanged zeolite Y. They have embarked on a study of synthetic powdered samples of this catalyst using the techniques of both neutron and X-ray diffraction, and report in this paper on a neutron Rietveld profile analysis of a K{sup +}-exchanged ferrierite.
- OSTI ID:
- 7128462
- Journal Information:
- Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 119:1; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
10 SYNTHETIC FUELS
102000 -- Synthetic Fuels-- Products & By-Products-- (1990-)
ALCOHOLS
ALKALI METALS
ALKANES
ALKENES
ALKYLATED AROMATICS
AROMATICS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC REFORMING
CHEMICAL REACTIONS
COHERENT SCATTERING
COMPARATIVE EVALUATIONS
CRACKING
DECOMPOSITION
DIFFRACTION
ELECTRONIC STRUCTURE
ELEMENTS
HYDRATION
HYDROCARBONS
HYDROXY COMPOUNDS
INDUSTRY
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
ISOMERIZATION
MATERIALS
METALS
METHANOL
MINERALS
NEUTRON DIFFRACTION
ORGANIC COMPOUNDS
PETROLEUM INDUSTRY
POTASSIUM
PYROLYSIS
REFORMER PROCESSES
SCATTERING
SOLVATION
THERMOCHEMICAL PROCESSES
X-RAY DIFFRACTION
XYLENES
ZEOLITES