Isomorphous substitution of iron ions into aluminophosphate molecular sieve, AlPO sub 4 -5

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90194-M· OSTI ID:7142262

Park, Jong Wook; Chon, Hakze ^[1]

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1. Korea Advanced Inst. of Science and Technology, Seoul (Korea)

FAPO-5 molecular sieves synthesized with Fe(II) and TEAOH and differing in iron content have been characterized by using various physicochemical methods to elucidate the incorporation of the iron ions into the aluminophosphate matrix. In as-synthesized FAPO-5, a large portion of Fe(III) ions are located in the framework position of AlPO{sub 4}-5, and Fe(II) ions are introduced in place of Al(III) ions in the form of Fe(II)TEA{sup +}. Fe(II) ions are oxidized to Fe(III) while remaining in the framework position in the course of calcination to remove the template. In the case of Fe-silicate ZSM-5, some of the Fe(III) ions located in the framework seem to be removed after the calcination.

• OSTI ID: 7142262
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 133:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ALUMINIUM COMPOUNDS
ALUMINIUM PHOSPHATES
CALCINATION
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DECOMPOSITION
DIFFRACTION
ELEMENTS
IRON
IRON COMPOUNDS
IRON SILICATES
MATERIAL SUBSTITUTION
MATERIALS
MATRIX MATERIALS
METALS
MOLECULAR SIEVES
MORPHOLOGY
OXIDATION
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PYROLYSIS
SCATTERING
SILICATES
SILICON COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
X-RAY DIFFRACTION