Unraveling Hydrocarbon Pool Boosted Propane Aromatization on Gallium/ZSM-5 Zeolite by Solid-State Nuclear Magnetic Resonance Spectroscopy,Angewandte Chemie International Edition

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Unraveling Hydrocarbon Pool Boosted Propane Aromatization on Gallium/ZSM-5 Zeolite by Solid-State Nuclear Magnetic Resonance Spectroscopy
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2021-09-07 , DOI: 10.1002/anie.202111111
Chao Wang _{1,

2} , Xingling Zhao _{1,

2,

3} , Min Hu _{1,

2} , Guodong Qi _{1,

2} , Qiang Wang _{1,

2} , Shenhui Li _{1,

2} , Jun Xu _{1,

2} , Feng Deng _{1,

2}

Affiliation

Propane aromatization on metal-modified zeolites provides a promising route to produce valuable chemicals such as benzene, toluene and xylene via non-petroleum feedstocks. The mechanistic understanding of propane conversion to aromatics is still challenging due to the complexity of the aromatization process. Herein, by using solid-state NMR spectroscopy and GC-MS, it is shown that cyclopentenyl cations are formed as active intermediates during propane aromatization on Ga/ZSM-5 zeolite. Autocatalysis of propane to aromatics is identified in the induction period. The cyclopentenyl cations serve as key hydrocarbon pool species to co-catalyze propane conversion and promote aromatics formation, revealing a dominant hydrocarbon pool process in propane aromatization.

中文翻译：

通过固态核磁共振光谱解开烃池促进丙烷芳构化在镓/ZSM-5 沸石上的作用

金属改性沸石上的丙烷芳构化为通过非石油原料生产苯、甲苯和二甲苯等有价值的化学品提供了一条有前途的途径。由于芳构化过程的复杂性，对丙烷转化为芳烃的机理理解仍然具有挑战性。在此，通过使用固态 NMR 光谱和 GC-MS，表明在 Ga/ZSM-5 沸石上的丙烷芳构化过程中，环戊烯基阳离子作为活性中间体形成。丙烷自催化转化为芳烃是在诱导期确定的。环戊烯基阳离子作为关键的烃池物质共同催化丙烷转化并促进芳烃形成，揭示了丙烷芳构化中占主导地位的烃池过程。

更新日期：2021-10-19

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