In situ FTIR spectroscopy study to reveal Ga-modified ZSM-5 for boosting isobutene amination

文献情報

出版日 2022-03-25

DOI 10.1039/D2RE00055E

インパクトファクター 4.239

著者

Shiqing Wang, Xiaocheng Lan, Shiyong Xing, Babar Ali, Tiefeng Wang

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要旨

Direct amination of isobutene to tert-butylamine is industrially attractive but extremely challenging. Understanding the mechanism and modifying the acid site properties are important for developing highly efficient amination catalysts. Here we developed Ga-modified ZSM-5 to boost the direct amination of isobutene and investigated the mechanism via in situ FTIR spectroscopy. Kinetic evaluation of isobutene protonation indicated that the addition of Ga facilitated the protonation of isobutene. By combining DFT calculations and in situ FTIR experiments, we inferred that the displacement of NH4+ on active sites by isobutene and the subsequent activation of isobutene to the corresponding intermediates limited the catalytic activity. The addition of Ga to Al-ZSM-5 modified the adsorption strength of the reaction species and provided synergistic effect sites and thus enhanced the isobutene amination activity.

掲載誌

Reaction Chemistry & Engineering

CiteScore: 0

自己引用率: 8.8%

年間論文数: 284

Reaction Chemistry & Engineering is an interdisciplinary journal reporting cutting-edge research focused on enhancing the understanding and efficiency of reactions. Reaction engineering leverages the interface where fundamental molecular chemistry meets chemical engineering and technology. Challenges in chemistry can be overcome by the application of new technologies, while engineers may find improved solutions for process development from the latest developments in reaction chemistry. Reaction Chemistry & Engineering is a unique forum for researchers whose interests span the broad areas of chemical engineering and chemical sciences to come together in solving problems of importance to wider society. All papers should be written to be approachable by readers across the engineering and chemical sciences. Papers that consider multiple scales, from the laboratory up to and including plant scale, are particularly encouraged.

In situ FTIR spectroscopy study to reveal Ga-modified ZSM-5 for boosting isobutene amination

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