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

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL Particuology Pub Date : 2024-10-29 DOI:10.1016/j.partic.2024.10.012

Zhiqi Xie , Shengwen Zhu , Xingsheng Wang , Shuang Wei , Ruirui Zhang , Ruixia Liu

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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.

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微波合成用于正丁烷选择性氧化的氧化钒磷催化剂

氧化钒磷（VPO）催化剂在正丁烷选择性氧化成顺丁烯二酸酐（MA）的过程中起着至关重要的作用，其催化性能与前驱体的合成条件有很大关系。本研究重点探讨了一种简便快速的微波辐照合成 VPO 前驱体的方法。研究了微波照射时间和功率对 VPO 形貌、晶体结构和催化效果的影响。通过 SEM、TEM、BET、FT-IR、XRD、Raman 和 XPS 表征，探讨了催化剂结构与性能之间的关系。结果表明，微波功率是影响活化后焦磷酸钒的尺寸、厚度、表面积和活性表面的关键因素。此外，催化剂表面的 P/V 比和 Lat-O/Sur-O 比随不同的合成条件而变化，对催化性能有显著影响。总之，微波合成的 VPO 催化剂在正丁烷转化率（87.2%）和顺丁烯二酸酐（MA）选择性（70.2%）方面均有显著提高，具有高效、节能的特点，为今后制备 VPO 催化剂提供了新的研究方向。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.