(394b) Confined Synthesis of Mesoporous ZSM-5 and Their Catalytic Performances

Fan, W., University of Massachusetts Amherst
Lee, P., University of Minnesota
Kumar, S., University of Minnesota
Bhan, A., University of Minnesota

Microporous crystalline aluminosilicate, zeolites, are primarily used for catalytic fuel-upgrading in refineries and also for the production of various petrochemicals. Their superior performance can often be attributed to the existence of a well-defined system of micropore with uniform shape and size. However, in many cases, the sole presence of micropore can also be a major limitation because mass transport to and from the active sites located within the micropore is slow, which is often limiting the performance of industrial catalysts. In this study, ZSM-5 was synthesized inside three-dimensionally-ordered mesoporous (3DOm) carbon with a uniform pore size from 20 nm to 50 nm1. Electron Microscopy, X-ray diffraction and N2 adsorption and desorption reveal that the ZSM-5 crystals reliably replicate the 3DOm porosity, resulting in highly ordered mesopore structure with a controllable pore size from 2 nm to 5 nm. Effect of the presence of mesopore on the adsorption and catalytic performances with respect to monomolecular alkane activation will be discussed in the presentation.

1.Fan, W.; Synder, M. A.; Sandeep, K.; Lee, S. P.; Yoo, C. W.; McCormick, A. V.; Penn, L. R.; Stein, A.; Tsapatsis, M. Nat. Mater. 2008, 7, 984.