Isomerization ofn-hexane overplatinum loaded zeolites

Lee, Jeong-Kyu; Lee, Ho‐Taek; Rhee, Hyun‐Ku

doi:10.1007/bf02064746

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…It is clear, though, that Zn and Co are much more resistant to demetalation than Pd and that Cu has an intermediate level of stability. 6,[56][57][58] The sequence of stability to demetalation reported here is in qualitative agreement with these observations. It has been proposed that metal cations can form µ-bridged metal-oxo dimers, [M-O-M] 2+ .…”

Section: Resultssupporting

confidence: 89%

“…The literature on the effects of O 2 and H 2 O on the stability of M 2+ cations in ZSM-5 is not sufficiently developed to enable one to identify the relative stability for a sequence of metal cations. It is clear, though, that Zn and Co are much more resistant to demetalation than Pd and that Cu has an intermediate level of stability. ,− The sequence of stability to demetalation reported here is in qualitative agreement with these observations.…”

Section: Resultssupporting

confidence: 85%

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Theoretical Studies of the Coordination and Stability of Divalent Cations in ZSM-5

2000

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 85%

Theoretical Studies of the Coordination and Stability of Divalent Cations in ZSM-5

2000

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Deactivation and regeneration of Pt‐modified zeolite Beta–Bindzil extrudates in n‐hexane hydroisomerization

Vajglová

Kumar

Peurla

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The metal–acid bifunctional catalysts are widely used in many industrially significant chemical processes, including hydroisomerization of n‐hexane. Deactivation and regeneration of metal–acid bifunctional extrudates was investigated in continuous n‐hexane hydroisomerization in a fixed‐bed reactor. Four Pt/H‐Beta‐25 catalysts containing 30% Bindzil binder were prepared with the same composition and controlled metal deposition. RESULTS Different preparation steps led to differences in the mechanical strength, Pt particle size, acidity and strength, metal‐to‐acid site (cPt/cAS) ratio and proximity between two types of active sites. A very slow deactivation and high selectivity to C6 isomers was obtained when Pt was deposited on H‐Beta‐25 zeolite. CONCLUSION Initial selectivity to the desired products was correlated with the physicochemical properties of the catalysts. Location of the metal has a larger influence on catalyst deactivation of the bifunctional catalysts rather than the metal‐to‐acid site ratio or site proximity. Decline of n‐hexane conversion and selectivity to C6 isomers were correlated with changes in the textural properties and acidity of the deactivated catalyst, respectively. © 2021 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Sulfur tolerance of zeolite beta-supported Pd−Pt catalysts for the isomerization of n-hexane

Lee

Rhee

1998

Journal of Catalysis

100

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Isomerization ofn-hexane overplatinum loaded zeolites

Cited by 8 publications

References 12 publications

Theoretical Studies of the Coordination and Stability of Divalent Cations in ZSM-5

Theoretical Studies of the Coordination and Stability of Divalent Cations in ZSM-5

Deactivation and regeneration of Pt‐modified zeolite Beta–Bindzil extrudates in n‐hexane hydroisomerization

Sulfur tolerance of zeolite beta-supported Pd−Pt catalysts for the isomerization of n-hexane

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