Pore size engineering

Barrer. R. M In Zeolites Drtty. B. Hntevur. S.. I cjovnik, S. Eds.. Elsevier Amsterdam. 19S5. pp 1-26. Vansani. E. F. Pore Size Engineering >" ZcuUle.v. Wiley New York, 1990. 

We have combined these approaches of pore size engineering with another synthesis route where uniform spherical particles are obtained in the micron and submicron size range [7]. The latter procedure allows one to adjust the particle size and size distribution of the silica particles by the reaction conditions. 

Pore size engineering of mesoporous silicas using alkanes as swelling agents... 

Pore Size Engineering of Mesoporous Silicas Using Alkanes as Swelling Agents 75... 

In order to improve the performance of zeolites as molecular sieves, several modification techniques were developed to vary in a controlled way the zeolitic pore system pore size engineering. In practice, pore size engineering in zeolites can be the result of a... 

Pore size engineering in zeolites can also be achieved by a modification of the zeolitic framework resulting from ... 

E.F. Vansant, Pore Size Engineering in Zeolites, J. Wiley Sons, 1990. 

Post-synthesis methods (pore-size engineering) allow an existing shape-selectivity effect to be intensified, and also a new one to be established. However, normally not only the pore size will be influenced by most of these methods, but also the catalytic activity. Vansant [104] gives a classification of post-synthesis modification methods which covers the entire range of zeolite applications (gas separation, gas purification, encapsulation of gases and catalysis). 

Y.H. Yue, Y. Tang, and Z. Gao, Zeolite Pore Size Engineering by Chemical Liquid Deposition, Progress in Zeolite and Microporous Materials. Stud. Surf. Sci. Catal., Part C, 1996, 105, 2059-2065. 

A. Vinu, V. Murugesan, and M. Hartmann, Pore Size Engineering and Mechanical Stability of the Cubic Mesoporous Molecular Sieve SBA-1. Chem. Mater., 2003, 15, 1385-1393. 

CATALYST PORE SIZE ENGINEERING AND ITS EFFECTS ON FCC CATALYST PROPERTIES... 

Barrcr. R. M. In Zeolites. Drtaj. B. HoCevar. S. Pejovnik. S.. Eds. Elsevier Amslcrdum. 1985 pp 1-26. Vansant. E. F. Pore Size Engineering in Zeolites. Witey New York, tV90. 

Pore size engineering of MCM-48 the use of different additives as expanders... 

Vinu, A., Murugesan, V., and Hartmann, M. 2003. Pore size engineering and mechanical stability of the cubic mesoporous molecular sieve SBA-1. Chem. Mater. 15 1385-1393. Voronkov, M. G., Belyaeva, V. V, and Abzaeva, K. A. 2012. Basicity of silatranes (review). Chem. Hetewcycl. Comp. 47(11) 1330-1338. 

Medium Useful for catalysis. Use pore-size enginering to optimise after synthesis Common ZSM5, ZSMll... 

Vansant, E. F. (1990) Pore Size Engineering in Zeolites Wiley, New York, NY. 

However, not all important phenomena of post-synthesis modification are covered with the present six chapters of Volume 3 of the series Molecular Sieves - Science and Technology . Topics such as, for instance, Incorporation of Dyes into Molecular Sieves , Preparation of Ship-in-the-Bottle Systems , Secondary Synthesis in Zeolites , Pore Size Engineering , Modification of Mesoporous Materials are equally important and, to a large extent, presently subject to very active research and development. Therefore, such topics will be dealt with in one of the subsequent volumes under the title Post-Synthesis Modification IT. 

---