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Issue 7, 2020
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Effects of particle size on bifunctional Pt/SAPO-11 catalysts in the hydroisomerization of n-dodecane

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Abstract

The SAPO-11 zeolite is widely used in the hydroisomerization of n-paraffins due to its unique shape selectivity, and the particle size plays an important role in the catalytic performance. Herein, multi-scale SAPO-11 zeolites with different particle sizes (65 nm to 4.5 μm) are successfully synthesized via a modified dry-gel conversion method by controlling the nucleation rate and the growth rate of the crystal. The resulting samples were characterized by XRD, SEM, N2 adsorption desorption, NH3-TPD, Py-IR and 29Si MAS NMR. These solid results indicate that the change in particle size of SAPO-11 has a large effect on its structure and acidity. Furthermore, the n-dodecane hydroisomerization reaction was investigated in this work, and the experimental results show that the prepared bifunctional Pt/SAPO-11-10% catalyst has the highest iso-dodecane yield (70.9%) with a conversion of 93.5% among all the samples, which could be ascribed to the synergistic effect between the suitable particle size and acid sites, which enhanced its catalytic performance.

Graphical abstract: Effects of particle size on bifunctional Pt/SAPO-11 catalysts in the hydroisomerization of n-dodecane

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Supplementary files

Article information


Submitted
16 Dec 2019
Accepted
24 Jan 2020
First published
24 Jan 2020

New J. Chem., 2020,44, 2996-3003
Article type
Paper

Effects of particle size on bifunctional Pt/SAPO-11 catalysts in the hydroisomerization of n-dodecane

L. Ge, G. Yu, X. Chen, W. Li, W. Xue, M. Qiu and Y. Sun, New J. Chem., 2020, 44, 2996
DOI: 10.1039/C9NJ06215G

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