Structure and Reactivity of Metal Ion Species in High-Silica Zeolites
||Computer Modelling of Microporous Materials
Elsevier Inc.. 2004.
298 c. ISBN 9780121641375.
van Santen R.A.
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
Netherlands Organisation for Scientific Research
A review; in this chapter, the emphasis moves to reactivity at metal ion sites in zeolites. One of the recent trends in the development of heterogeneous catalysts is connected with metal-contg. zeolites. Metal cations can be introduced into a zeolite at the synthesis stage as well as via various methods of zeolite modification (such as liq.- or solid-state ion-exchange technique, chem. vapor deposition). There are now a no. of unique catalysts (esp. MFI zeolites-based ones) showing high activity and selectivity in the diverse processes. Typical examples of such catalysts and processes are: Ti-contg. zeolites (hydrocarbon oxidn. by hydrogen peroxide); Fe zeolites (direct oxidn. of benzene into phenol by nitrous monoxide); Zn and Ga zeolite (dehydrogenation and aromatization of alkanes) and Cu, Fe, and Co zeolites (SCR of NOx).