Microwave synthesis of vanadium phosphorus oxide catalysts for n-butane selective oxidation--颗粒学报PARTICUOLOGY

Xie, Z., Zhu, S., Wang, X., Wei, S., Zhang, R., & Liu, R. (2025). Microwave synthesis of vanadium phosphorus oxide catalysts for n-butane selective oxidation. Particuology, 96, 97-105. https://doi.org/10.1016/j.partic.2024.10.012

Microwave synthesis of vanadium phosphorus oxide catalysts for n-butane selective oxidation

Zhiqi Xie^{a 1}, Shengwen Zhu^{a b 1}, Xingsheng Wang^a, Shuang Wei^a, Ruirui Zhang^{a b *}, Ruixia Liu^{a b *}

a Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, CAS, Beijing, 100190, China
b University of Chinese Academy of Sciences, Beijing, 100049, China

10.1016/j.partic.2024.10.012

Volume 96, January 2025, Pages 97-105

Received 9 July 2024, Revised 1 October 2024, Accepted 5 October 2024, Available online 29 October 2024, Version of Record 21 November 2024.

E-mail: rrzhang@ipe.ac.cn; rxliu@ipe.ac.cn

Highlights

• A facile and rapid microwave irradiation method was used to synthesize efficient VPO catalysts.

• Microwave heating saved 9/10 of reaction time compared with traditional heating method.

• VPO catalyst synthesized by microwave irradiation showed a noticeable enhancement of maleic anhydride selectivity.

Abstract

Vanadium phosphorus oxide (VPO) catalysts play a crucial role in the selective oxidation of n-butane to maleic anhydride (MA), and their catalytic performance is highly dependent on the synthesis conditions of the precursor. This study focuses on a facile and rapid microwave irradiation method for the synthesis of VPO precursors. The effects of microwave exposure time and power on morphology, crystalline structure, and catalytic effect of VPO are investigated. The relationship between the structure and performance of the catalysts is explored by SEM, TEM, BET, FT-IR, XRD, Raman, and XPS characterization. The results demonstrate that microwave power is the key factor influencing the size, thickness, surface area, and active surfaces of vanadium pyrophosphate after activation. Additionally, the P/V ratio and Lat-O/Sur-O ratio on the catalyst surface vary with different synthesis conditions, which significantly affect the catalytic performance. In conclusion, the microwave-synthesized VPO catalyst exhibits remarkable enhancements in n-butane conversion (87.2%) and maleic anhydride (MA) selectivity (70.2%), which shows high efficiency and energy-saving, providing a new research direction for the future preparation of VPO catalysts.

Graphical abstract

Keywords

Microwave synthesis; VPO catalyst; n-butane oxidation; Maleic anhydride yield

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