Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7702236 | Ultrasonics Sonochemistry | 2018 | 21 Pages |
Abstract
The 0.5â¯wt% Pd-CeMnO3 was prepared by ultrasonic intervention combination of Sol-Gel and PVA-protected N2 bubbling NaBH4 reduction impregnation method, then it was used for the catalytic oxidation of benzene vapour at low temperatures. By analyzing the removal and mineralization rate at different temperatures, it was found that 50% of benzene was degraded in 145â¯Â°C, then 90% of benzene was degraded in 186â¯Â°C, 100% of mineralization rate was 220â¯Â°C. After ultrasonic treatment, 64% removal rate and 46% mineralization rate could be increased, it proved that ultrasonic treatment can improve the performance of catalyst significantly. According to XRD spectrum, ultrasonic intervention helped to stabilize the crystalline structure of perovskite. Further, SEM pictures intuitively proved that ultrasonic treatment contributes to the formation of surface pore structure of catalyst. Moreover, diagram of H2-TPR indicates that ultrasonic intervention makes the catalyst have more cryogenic activity sites for strong low temperature catalytic activities. All these reasons are assumed to be the factors that lead to superior performance of the catalyst.
Keywords
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Honghong Yi, Jiali Xu, Xiaolong Tang, Shunzheng Zhao, Yuanyuan Zhang, Zhongyu Yang, Jiamin Wu, XiaoMi Meng, JingXuan Meng, Hao Yan, Qian Li,