Direct alkylation of benzene with propane promoted by a hydrotalcite-supported Pt–Fe and solid acid catalyst system

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-07-09 DOI:10.1016/j.cattod.2025.115448

Kenta Suzuki, Shingo Hasegawa, Ken Motokura

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Abstract

The development of suitable catalytic systems for the low-temperature dehydrogenation of propane to propylene could contribute to the highly selective production of cumene from propane and benzene. In this study, direct cumene synthesis from benzene and propane was conducted at 250 ℃ using supported Pt and solid acid catalysts. The supported Pt catalysts, including hydrotalcite-supported Pt–Fe bimetallic catalysts, were prepared using the ethylene glycol or sodium borohydride reduction method and characterized using transmission electron microscopy, X-ray diffraction, and Pt L₃-edge and/or Fe K-edge X-ray absorption fine structure analyses. Partially reduced, small Pt nanoparticles with diameters of 1.3–1.5 nm were formed in the catalyst prepared using the ethylene glycol reduction method. Among the solid acids mixed with the Pt catalysts, silica-supported heteropoly acids achieved a high conversion of benzene while maintaining good selectivity to cumene. In particular, Pt–Fe catalysts with silica-supported heteropoly acids achieved the highest selectivity for cumene (91.9 %), with a benzene conversion of 2.0 %.

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水滑石负载Pt-Fe和固体酸催化体系催化苯与丙烷的直接烷基化反应

开发适合丙烷低温脱氢制丙烯的催化体系，有助于丙烷和苯高选择性生产异丙烯。本研究采用负载Pt和固体酸催化剂，在250 ℃下，由苯和丙烷直接合成异丙苯。采用乙二醇或硼氢化钠还原法制备了负载Pt - Fe双金属催化剂，并采用透射电镜、x射线衍射、Pt l3边缘和/或Fe k边缘x射线吸收精细结构分析对负载Pt催化剂进行了表征。在乙二醇还原法制备的催化剂中，部分还原得到了直径为1.3 ~ 1.5 nm的Pt纳米颗粒。在与Pt催化剂混合的固体酸中，硅负载杂多酸对苯的转化率较高，同时对异丙烯保持良好的选择性。特别是，硅负载的杂多酸Pt-Fe催化剂对异丙烯的选择性最高（91.9 %），苯转化率为2.0 %。

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.