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Characterization of SAPO-11 and SAPO-31 synthesized from aqueous and non-aqueous media
- Source :
-
Applied Catalysis A: General . Aug2004, Vol. 270 Issue 1/2, p245-252. 8p. - Publication Year :
- 2004
-
Abstract
- Medium-pore SAPO-11 and SAPO-31 molecular sieves were synthesized from aqueous and non-aqueous (ethylene glycol) media. All the samples were characterized by XRD, SEM, N2 adsorption (BET analysis), TGA-DTA, pyridine-TPD, 27Al MAS-NMR, and 29Si MAS-NMR. The samples synthesized from non-aqueous medium possess higher acidity due to higher substitution of Si4+ at P5+ sites and less silica island formation, as evidenced from 29Si MAS-NMR spectra. It is possible to incorporate more silicon in the samples by synthesis in ethylene glycol medium. The SAPOs synthesized from non-aqueous medium show higher activity for the isomerization of m-xylene. [Copyright &y& Elsevier]
- Subjects :
- *ETHYLENE glycol
*MOLECULAR sieves
*X-ray diffraction
*SCANNING electron microscopy
Subjects
Details
- Language :
- English
- ISSN :
- 0926860X
- Volume :
- 270
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis A: General
- Publication Type :
- Academic Journal
- Accession number :
- 13623785
- Full Text :
- https://doi.org/10.1016/j.apcata.2004.05.013