6533b854fe1ef96bd12aec06
RESEARCH PRODUCT
Cracking behavior of zeolites with connected 12- and 10-member ring channels: The influence of pore structure on product distribution
V González-alfaroRaul F. LoboA.v. OrchillesVicente FornésMark E. DavisA. Cormasubject
Fluid catalytic crackingRing (chemistry)CatalysisProduct distributionchemistry.chemical_compoundCrackingchemistryChemical physicsIsobutaneOrganic chemistryPhysical and Theoretical ChemistryExponential decayZeoliteSelectivitydescription
n-Heptane has been cracked on a CIT-1 zeolite which has connected 12- and 10-member ring (MR) channels, and its behavior was compared with that of MCM-22 with nonconnected 12- and 10-MR channels, and SSZ-24 and BETA with unidirectional and tridirectional 12-MR channels, respectively. The kinetic rate constant is highest for CIT-1, and the decay constant is lowest. From the selectivity point of view, its behavior can be better represented by a system with large cavities (the intersections between the 12- and 10-MR) connected by windows. This gives a behavior typical of that of large pore zeolites. CIT-1 produces a remarkably high selectivity toi-C4, and specially to isobutane. This zeolite shows promise as an additive in FCC operations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-04-01 |