L. M. Knight, Gregory J. Lewis
2004
Citations
0
Influential Citations
10
Citations
Journal
Studies in Surface Science and Catalysis
Abstract
Abstract A template screening approach which applies combinatorial methods is used to investigate the structure directing properties of the ethyltrimethylammonium (ETMA) template, both by itself and in combination with other structure directing agents (SDA), in the range Si/Al=2-48. A central theme of the approach is to decouple the elements of zeolite crystallization, namely the silica, alumina and hydroxide sources, from the sources of the additional SDA's that strongly influence crystallization pathways, to more easily elucidate the roles of each in synthesis. This is accomplished by using ETMA aluminosilicate solutions, ETMAOH as the sole hydroxide source and supplemental SDA's (alkali and alkaline earth cations) as salts. The resulting experiment is well integrated with combinatorial methods, yields the new zeolite species UZM-4, UZM-8, UZM-15, UZM-17, and demonstrates the broad potential of a single organic template to make both small and large pore materials.