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Indexed by:期刊论文

Date of Publication:2010-11-01

Journal:MICROPOROUS AND MESOPOROUS MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:135

Issue:1-3

Page Number:143-148

ISSN No.:1387-1811

Key Words:Magadiite; Recrystallization; Zeolites; Tetraalkylammonium cations

Abstract:A study on magadiite recrystallization is undertaken to relate the influence of short-chain tetraalkylammonium (TAA(+)) cations to the zeolite obtained. Using different types of short-chain TAA(+) cations under various reactant conditions, OFF, MOR and MFI zeolites are obtained respectively. The infrared spectroscopy (IR), N(2) adsorption analysis, thermogravimetry and differential thermal analysis (TG/DTA) of MOR zeolite in the presence or absence of tetraethylammonium (TEA(+)) cations are carried out for comparison purpose; these results elucidate that TEA(+) cations exist in the micropore of MOR zeolite. The roles of TAA(+) cations in the recrystallization of magadiite into zeolites are systematically investigated. It is possible that OFF zeolite could be prepared easily when a small quantity of tetramethylammonium (TMA(+)) cations are used and TEA(+) cations interact strongly with MOR zeolite framework. The influence of tetrapropylammonium (TPA(+)) cations and tetrabutylammonium (TBA(+)) cations is structure directing on the magadiite recrystallization. (C) 2010 Elsevier Inc. All rights reserved.