通过物理混合催化剂的甲烷低温级联转化为芳烃

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-16 DOI:10.1007/s11144-024-02734-7

Tengfei Lu, Yongjie Wang, Yi Zhang

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引用次数: 0

摘要

在本研究中，甲烷脱氢芳构化（MDA）在1Zn3Pt/Al2O3-6Mo/HZSM-5物理混合催化剂上克服了热力学限制，在550℃和常压下进行了高效的两步级联反应。同时，MDA反应在30 h内实现了长期稳定，甲烷转化率为2.6%，芳烃选择性高达98%。对该双功能物理混合催化剂的一系列表征证明，该双功能物理混合催化剂抑制了过度芳化和深度脱氢引起的焦炭沉积，添加Zn促进剂促进氢在Pt金属上的外溢，进一步抑制了Pt颗粒的烧结，有助于甲烷在低温下稳定的级联转化为芳烃。

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Low-temperature cascade conversion of methane to aromatics via a physically mixed catalyst

In this study, Methane dehydrogenation aromatization (MDA) over the 1Zn3Pt/Al₂O₃-6Mo/HZSM-5 physically mixed catalyst overcame the thermodynamic limitations through an efficient two-step cascade reaction at 550 °C and atmospheric pressure. Meanwhile, MDA reaction realized long-term stability during 30 h with methane conversion of 2.6% and as high as 98% selectivity of aromatics. A series of characterizations of this bifunctional physically mixed catalyst proved that the bifunctional physically mixed catalyst inhibits the coke deposition induced by over-aromatization and deep dehydrogenation, and the added Zn promoter promotes hydrogen spillover on Pt metal and inhibits further the sintering of Pt particles, contributing to the stable cascade conversion of methane to aromatics at low temperatures.

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.