Promoting effect of Fe on Pt/ZSM-5 catalysts for propane dehydrogenation

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-02-01 DOI:10.1016/j.mcat.2024.114768

Fangli Jing , Xiangping Lv , Yuanyang Pi , Yuanyuan Zhang , Huan Xiang , Shizhong Luo

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Abstract

Propane dehydrogenation (PDH) is an attractive method for propylene production. PtxFe/ZSM-5 catalysts were prepared by the sequential incipient wetness impregnation of Fe and Pt on ZSM-5 support. The promoting effect of Fe on the catalytic performance of PtxFe/ZSM-5 during propane dehydrogenation reaction was studied. Various characterization techniques including N₂ adsorption/desorption, ICP-OES, HRTEM, XPS, CO-DRIFT and TG were employed to unravel the properties of the catalysts. The experimental results confirmed the importance of Fe as a promotor in PDH. Suitable loading of Fe could obviously improve propane conversion, propylene selectivity, and the anti-coking ability of the catalysts, while excessive Fe caused metal aggregation and promoted side reactions, leading to a decreased propylene selectivity. When Fe loading was 1.0 %, the resulting Pt1.0Fe/ZSM-5 exhibited the best catalytic performance (propane conversion = 47.1 %, and propylene selectivity = 78.9 %), and it also showed good catalytic stability after regeneration. Pt0.5Fe/ZSM-5 showed the lowest coke amount of 0.10 g_c·g_cat⁻¹, and the addition of 0.5 % Fe in Pt/ZSM-5 catalyst decreased 61.5 % of coke deposits.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods