by using a twofold structuredirecting
strategy. (1) The selection of the appropriate organic
structure-directing agent, which shapes the pore dimension of the
zeolite by filling its empty space. (2) By using the structure-directing
effect of Ge when incorporated in the zeolite framework to form
double-four-MR (D4MR)-containing structures. The combined
effect of the different pores on the catalytic performance of ITQ-22
materials will be shown and compared with those of SSZ-33, ZSM-5,
Beta and Mordenite zeolites.