Influence of ultrasound treatment over CuZnAlCr mixed oxide catalysts in high-temperature water gas shift reaction

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2024-10-01 DOI:10.1016/j.cherd.2024.09.043

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引用次数: 0

Abstract

An ultrasonic pretreatment was applied to prepare ZnO-CuO-Al₂O₃-Cr₂O₃ mixed oxide catalysts for high-temperature water-gas shift reactions. XRD, BET, SEM, EDX, TPR, TGA, and FT-IR characterization tests were administered. Sonication time (1, 1.5, 2.5 h) and power (70, 140, 210 W) studied. Characterization results indicated that ultrasonic waves significantly accelerated the chemical reaction, effectively decreasing particle agglomeration and increasing particle distribution uniformity. In SEM images, the particle size of the prepared sample with 30 % ultrasonic intensity is reduced with a uniform size distribution that increases surface area and creates excellent performance. The significant impact of ultrasound irradiation has been demonstrated in the development and growth of particles under various experimental synthesis conditions. The sample synthesized under 1.5 hour of ultrasound irradiation and 400℃ calcination obtained the best results because of morphology, surface area, and crystallinity contributing factors.

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超声处理对高温水煤气变换反应中铜锌铝铬混合氧化物催化剂的影响

通过超声波预处理制备了用于高温水-气变换反应的 ZnO-CuO-Al2O3-Cr2O3 混合氧化物催化剂。进行了 XRD、BET、SEM、EDX、TPR、TGA 和 FT-IR 表征测试。研究了超声时间（1、1.5、2.5 小时）和功率（70、140、210 瓦）。表征结果表明，超声波明显加速了化学反应，有效减少了颗粒团聚，提高了颗粒分布的均匀性。在 SEM 图像中，超声波强度为 30% 的制备样品的粒度减小，粒度分布均匀，增加了比表面积，性能优异。在不同的实验合成条件下，超声辐照对颗粒的发育和生长产生了重大影响。由于形态、比表面积和结晶度等因素的影响，在 1.5 小时超声辐照和 400℃ 煅烧条件下合成的样品获得了最佳结果。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.