Zeolites by solid-state ion exchange

In order to put the concept of introducing noble metals in the intracrystalline voids of small pore zeolites by solid state ion exchange on a more general basis, additional... 

Introduction of cobalt and nickel into zeolites by solid-state ion exchange was investigated by Jentys and colleagues and compared with preparations via conventional exchange in aqueous solution, impregnation and direct synthesis ([164-170], vide infra). For their studies, the authors employed TPD of NH3 (TPDA), IR spectroscopy, X-ray absorption spectroscopy (XANES and EXAFS) and XRD. TPDA revealed that 100% of the strong Bronsted acid sites were eliminated at an nco/nAi ratio of ca. 1.0 and 0.5 in the case of SSIE of C0CI2 in mixtures with H-ZSM-5 and NH4-Y, respectively. Therefore, the authors concluded... 

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