Coke-resistant (Pt+Ni)/ZSM-5 Catalyst for Shape-selective Alkylation of Toluene with Methanol to Para-xylene
Coke-resistant (Pt+Ni)/ZSM-5 Catalyst for Shape-selective Alkylation of Toluene with Methanol to Para-xylene
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DOI：
10.1016/j.ces.2022.117529
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发表时间：
2022-02
影响因子：
4.7
通讯作者：
He Han;Anfeng Zhang;Limin Ren;X. Nie;Min Liu;Yi Liu;C. Shi;Hong Yang;C. Song;Xinwen Guo
中科院分区：
文献类型：
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作者：
He Han;Anfeng Zhang;Limin Ren;X. Nie;Min Liu;Yi Liu;C. Shi;Hong Yang;C. Song;Xinwen Guo
Shape-selective alkylation of toluene with methanol is one of the most attractive promising synthetic routes topara-xylene. To date, modified ZSM-5 zeolites are considered to be one of the best candidate catalysts for this reaction. Although thepara-selectivity could be tuned to approaching 100% by modification of the zeolite and optimization of reaction conditions, at present, there is still a lack of effective means to inhibit the rapid deactivation of the catalysts due to coke formation. In this work, a coke-resistant (Pt + Ni)/ZSM-5 zeolite with excellent stability for shape-selective alkylation of toluene with methanol topara-xylene is developed. The pore structure and acid properties of the zeolite are effectively tuned to ensure highpara-selectivity. Meanwhile, the co-existence of Pt and Ni species in this catalyst plays the critical role in inhibiting coke formation, as the two species concurrently impede the formation of olefins, the main coking precursors, via two distinctive mechanisms.
