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Preparation and characterization of mesoporous aluminosilicates from Ca-A zeolite

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Preparation and characterization of mesoporous aluminosilicates from Ca-A zeolite

Vo, Ngoc Truc-Chi (1992) Preparation and characterization of mesoporous aluminosilicates from Ca-A zeolite. Masters thesis, Concordia University.

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Abstract

Three methods have been developed in order to enlarge the pore size of the micropore-type zeolite into a mesopore type: (a) 0.2N HCl acid treatment at 80$\sp\circ$C from which the time of exposure to the acid medium has a great influence on the pore size distribution of the resulting materials. (b) A hydrothermal treatment followed by a mild acid treatment that can unblock the pore openings. (c) Finally, a treatment with 0.5M (NH$\sb4$)$\sb2$SiF$\sb6$. The two first methods provided mesopores of 3.5-4.5 nm while the last one produced larger mesopores of ca. 14 nm. Several physico-chemical techniques were used to characterize the reaction products: BET measurements, XRD, AA Spectrophotometry, hydrophobicity measurement, bulk density, $\sp{29}$Si- and $\sp{27}$Al-NMR.

Divisions:Concordia University > Faculty of Arts and Science > Chemistry and Biochemistry
Item Type:Thesis (Masters)
Authors:Vo, Ngoc Truc-Chi
Pagination:xiv, 142 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M.Sc.
Program:Chemistry
Date:1992
Identification Number:QD 181 S6V795 1992
ID Code:34
Deposited By: Concordia University Library
Deposited On:27 Aug 2009 17:09
Last Modified:13 Jul 2020 19:45
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