Details
| Original language | English |
|---|---|
| Pages (from-to) | 193-202 |
| Number of pages | 10 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 55 |
| Issue number | 2 |
| Early online date | 4 Jun 2002 |
| Publication status | Published - 16 Sept 2002 |
Abstract
Zeolite Y was thermochemically dealuminated (DAY) by steaming for 7 h at 873 K. The total concentrations of the [SiO2] and [AlO2] building units of zeolites Y, DAY and its acid-(DAYacid), alkaline-(DAYalkaline), and successively alkaline- and acid-(DAYalkaline+acid) leached forms, separately for their dissolved and solid components, were determined wet chemically. Non-framework species of the solids were quantified using the molybdate and ferron chemical methods and they were identified as aluminosilicate (DAY, DAYalkaline) and silica gels (DAYacid, DAYalkaline+acid). Chemical mass balances were used to calibrate IR, NMR and XRD data to the Si/Al ratios of the zeolite framework without superimposition of the framework with non-framework species.
Keywords
- Dealumination, Non-framework material, Phase transformation, Spectroscopic methods, Zeolite
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 55, No. 2, 16.09.2002, p. 193-202.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Determination of the framework and non-framework [SiO2] and [AlO2] species of steamed and leached faujasite type zeolites
T2 - Calibration of IR, NMR, and XRD data by chemical methods
AU - Lutz, W.
AU - Rüscher, C. H.
AU - Heidemann, D.
PY - 2002/9/16
Y1 - 2002/9/16
N2 - Zeolite Y was thermochemically dealuminated (DAY) by steaming for 7 h at 873 K. The total concentrations of the [SiO2] and [AlO2] building units of zeolites Y, DAY and its acid-(DAYacid), alkaline-(DAYalkaline), and successively alkaline- and acid-(DAYalkaline+acid) leached forms, separately for their dissolved and solid components, were determined wet chemically. Non-framework species of the solids were quantified using the molybdate and ferron chemical methods and they were identified as aluminosilicate (DAY, DAYalkaline) and silica gels (DAYacid, DAYalkaline+acid). Chemical mass balances were used to calibrate IR, NMR and XRD data to the Si/Al ratios of the zeolite framework without superimposition of the framework with non-framework species.
AB - Zeolite Y was thermochemically dealuminated (DAY) by steaming for 7 h at 873 K. The total concentrations of the [SiO2] and [AlO2] building units of zeolites Y, DAY and its acid-(DAYacid), alkaline-(DAYalkaline), and successively alkaline- and acid-(DAYalkaline+acid) leached forms, separately for their dissolved and solid components, were determined wet chemically. Non-framework species of the solids were quantified using the molybdate and ferron chemical methods and they were identified as aluminosilicate (DAY, DAYalkaline) and silica gels (DAYacid, DAYalkaline+acid). Chemical mass balances were used to calibrate IR, NMR and XRD data to the Si/Al ratios of the zeolite framework without superimposition of the framework with non-framework species.
KW - Dealumination
KW - Non-framework material
KW - Phase transformation
KW - Spectroscopic methods
KW - Zeolite
UR - http://www.scopus.com/inward/record.url?scp=0037120299&partnerID=8YFLogxK
U2 - 10.1016/S1387-1811(02)00403-1
DO - 10.1016/S1387-1811(02)00403-1
M3 - Article
AN - SCOPUS:0037120299
VL - 55
SP - 193
EP - 202
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 2
ER -