INFLUENCE OF ION-EXCHANGE AND CALCINATION ON PORE-SIZE AND THERMAL-STABILITY OF MCM-41 WITH DIFFERENT SI AL RATIOS/

Authors
KOCH H BOHMER U KLEMT A RESCHETILOWSKI W STOCKER M
Citation
H. Koch et al., INFLUENCE OF ION-EXCHANGE AND CALCINATION ON PORE-SIZE AND THERMAL-STABILITY OF MCM-41 WITH DIFFERENT SI AL RATIOS/, Journal of the Chemical Society. Faraday transactions, 94(6), 1998, pp. 817-820
Citations number
24
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Journal of the Chemical Society. Faraday transactions → ACNP
ISSN journal
09565000
Volume
94
Issue
6
Year of publication
1998
Pages
817 - 820
Database
ISI
SICI code
0956-5000(1998)94:6<817:IOIACO>2.0.ZU;2-W
Abstract
A decrease in pore size and increase in thermal stability of three dif ferent MCM-41 materials with Si/Al ratios of 18.6, 17.3 and 3.1, due t o ammonia ion exchange and following calcination at 540 degrees C, has been observed by N-2 sorption measurements, differential thermal anal ysis (DTA) and X-ray diffraction (XRD). An explanation based on recrys tallization at the pore mouth is proposed and the influence of the alu mina content of the materials is discussed.