Construction of hierarchical core-shell Pt/USY@MSA bifunctional catalysts for hydroisomerization of n-hexadecane

被引：8
|
作者：
Wang, Bo [1 ]
Zhao, Jinsheng [1 ]
Pan, Hongxi [1 ]
Dong, Yunyun [1 ]
Li, Xiaolei [1 ]
Tao, Shuo [1 ]
机构：
[1] Liaocheng Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Shandong, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2023年 / 653卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Core-shell; Hierarchical; Nanoscale distance; Hydroisomerization; SELECTIVE CONVERSION; ZEOLITES; DESIGN; NANOPARTICLES; INTIMACY; METAL;
D O I：
10.1016/j.apcata.2022.119011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Hydroisomerization of long-chain n-alkanes is an indispensable process in the upgrading of fuel oil and lubricants to meet the state of art regulations. In this work, a novel core-shell structural material comprising USY zeolite core and mesoporous aluminosilicate (MSA) shell, denoted as USY@MSA, was fabricated by virtue of a desili-cation and recrystallization approach. Comprehensive characterizations demonstrate that the USY@MSA com-posite exhibits a hierarchical pore architecture and a gradient acidity. Due to the confinement effect of the mesoporous aluminosilicate shell, highly dispersed platinum particles were selectively deposited on the shell, generating a nanoscale distance with acidic sites of USY zeolite core. In the hydroisomerization of n-hexadecane, the Pt/USY@MSA composite catalyst outperforms the conventional Pt/USY and desilicated Pt/USY-ds catalysts, effectively suppressing the cracking side reactions and producing higher selectivity to branched isomers.
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页数：10
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