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The catalytic behavior of 1/1 cation (Ga, Cu, or In)/framework-Al MFI (MFI is terminology officially sanctioned by the International Zeolite Association, IUPAC commission) zeolite for propane dehydrocyclization was examined under conditions where the materials were initially either in fully protonated or fully metal-loaded states. Metal-loading was accomplished with reductive solid-state ion exchange,...
Microbalance thermal analysis (TA) experiments reveal that amine molecules adsorbed in zeolite hosts such as MFI, BEA, and MOR differ substantially depending on the guest-host interactions involved. Three groups of amine species that are observed in acidic zeolites are broadly defined as: (1) primary adsorbed species (PAS) anchored directly to the host active sites: (2) nearest-neighbor species (NNS)...
The process of converting “as-synthesized” zeolites which contain organic templating agents generally begins by calcining the material to remove the organic material. Most often, this initial calcining step is performed in the presence of O 2 which is thought to help burn out residue which forms during the thermal breakdown of the organic template. We have discovered that O 2 promotes...
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