Catalysis by zeolites

Only a very few selected examples have been discussed. The number of processes based on shape-selective catalysis by zeolites is ever increasing, particularly in the field of speciality and fine chemicals and quite a few have been... 

Volume 5 Catalysis by Zeolites. Proceedings of an International Symposium, Ecully (Lyon),... 

In the above discussion, we have presumed that the tortuosity factor t is characteristic of the pore structure but not of the diffusing molecules. However, when the size of the diffusing molecule begins to approach the dimensions of the pore, one expects the solid to exert a retarding influence on the flux and this effect may also be incorporated in the tortuosity factor. This situation is likely to be significant in dealing with catalysis by zeolites (molecular sieves). 

Derouane, E.G., New aspects of molecular shape-selectivity catalysis by zeolite ZSM-5 Imelik, B. Naccache, C. ... 

Taarit, Y. Ben Vedrine, J.C. Coudrier, G. Praliaud, H., Eds., Catalysis by Zeolites, Studies in Surface Science and Catalysis 5, Elsevier Sci. Publ. Co. Amsterdam, 1980,... 

X. L. Bai and W. M. H. Sachtler, Methylcyclopentane conversion catalysis by zeolite encaged palladium clusters and palladium-proton adducts, J. Catal. 129, 121-129 (1991). 

Boronat, M., Virrruela, M., and Corma, A. (2004) Reaction intermediates in acid catalysis by zeolites prediction of the relative tendency to form alkoxides or carbocations as a function of hydrocarbon nature and active site structure. 

Stocker, M. (2005) Gas phase catalysis by zeolites. Micropor. Mesopor. Mater., 82, 257-292. 

Haag, W.O. (1994) Catalysis by zeolites-sdence and technology. Stud. Surf. Sci. Catal., vol. 84, Elsevier, Amsterdam, pp. 1375-1394. 

Catalysis by Zeolites. Proceedings of an International Symposium organized by the Institut de Recherche sur la Catalyse-CNRS-Villeurbanne and sponsored by the Centre National de Recherche Scientifique, Ecully(Lyon), September 9-11, 1980... 

Figure 8.21 Relation between diffusion and shape-selective catalysis by zeolites (a) diffusion coefficients of -alkanes in potassium T-zeolite and (b) product distribution for the cracking of n-tricosane over H-erionite. (Following Gorring, 1973.)...

Zeolites may behave as Lewis acids at Al,+ sites, or as Br0nsted-Lowry acids by means of absorbed H+ ions. Because they have relatively open structures, a variety of small molecules may be accommodated within the —O—Al—O—Si— framework. These molecules may then be catalyzed to react by the acidic centers. Coordinatively, unsaturated oxide ions can act as basic sites, and in some catalytic reactions both types of centers are believed to be important. Catalysis by zeolites is discussed further in Chapter 15. 

Mediating Effect of CO2 in Base-Catalysis by Zeolites Tawan Sooknoia and John Dwyerb... 

T. Sooknoi and J. Dwyer, Role of Substrate s Electrophilicity in Base Catalysis by Zeolites, to be published. 

Catalysis by Zeolites" Edited by B. Imelik, Elsevier, Amsterdam, 1981. 

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