Oxidation of benzene with N2O on ZSM-5 zeolite: A comparison of gas-phase and supercritical conditions

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL Journal of Supercritical Fluids Pub Date : 2024-07-22 DOI:10.1016/j.supflu.2024.106355

V.I. Bogdan , V.L. Zholobenko , T.V. Bogdan , A.L. Kustov , A.E. Koklin , I.I. Mishanin , N.V. Mashchenko , S.E. Bogorodskiy

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Abstract

The catalytic oxidation of benzene with nitrous oxide (N₂O) over ZSM-5 zeolite has been carried out in a continuous-flow reactor under supercritical conditions and compared with the results of the gas-phase reaction. Aromatic substrates and nitrous oxide under the conditions of supercritical experiments (300–435 °C, 6.0–18.0 MPa) are both reagents and the supercritical medium. It has been established that the productivity of the supercritical oxidation of benzene into phenol significantly exceeds the productivity of the gas-phase process owing to the limited reversible deactivation of the catalyst under supercritical conditions and the in situ removal of the coke precursors by the dense reaction medium. In addition, it has been demonstrated that a successful in situ regeneration of the deactivated oxidation catalyst can be carried out during the transition from gas-phase reaction conditions to supercritical conditions in one experiment.

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在 ZSM-5 沸石上用 N2O 氧化苯：气相和超临界条件的比较

在超临界条件下，ZSM-5 沸石在连续流反应器中实现了苯与氧化亚氮（NO）的催化氧化，并与气相反应的结果进行了比较。在超临界实验条件下（300-435 °C，6.0-18.0MPa），芳香基质和氧化亚氮既是试剂，也是超临界介质。实验证明，由于催化剂在超临界条件下的可逆失活有限，以及高密度反应介质对焦炭前体的清除作用，苯超临界氧化成苯酚的生产率大大超过气相工艺的生产率。此外，实验还证明，在一次实验中，从气相反应条件过渡到超临界条件时，可以成功地对失活的氧化催化剂进行原位再生。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.