SSZ-53 and SSZ-59: two novel extra-large pore zeolites.
The syntheses, structure solutions, and physicochemical and catalytic characterizations of the novel zeolites SSZ-53 and SSZ-59 are described. SSZ-53 and SSZ-59 were synthesized under hydrothermal conditions with the [1-(4-fluorophenyl)cyclopentylmethyl]trimethyl ammonium cation and 1-[1-(4-chlorophenyl)cyclopentylmethyl]-1-methyl azocanium cation, respectively, as structure-directing agents. The framework topology of SSZ-53 was solved with the FOCUS method, and the structure of SSZ-59 was determined by model building. Rietveld refinement of synchrotron X-ray powder diffraction data confirms each proposed model. SSZ-53 and SSZ-59 each possess a one-dimensional channel system delimited by 14-membered rings. Results from transmission electron microscopy, electron diffraction, catalytic experiments (spaciousness index and constraint index tests), and argon and hydrocarbon adsorption experiments are consistent with the proposed structures.
Burton
Allen
A
ChevronTexaco Energy Research and Technology Company, 100 Chevron Way, Richmond, CA 94802, USA. buaw@chevrontexaco.com
Elomari
Saleh
S
Chen
Cong-Yan
CY
Medrud
Ronald C
RC
Chan
Ignatius Y
IY
Bull
Lucy M
LM
Kibby
Charles
C
Harris
Thomas V
TV
Zones
Stacey I
SI
Vittoratos
E Steven
ES