接枝法CuMnCeOx负载高硅氧滤料制备及脱硝性能研究

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摘要为研究出一种适用范围更普遍、负载强度更牢固的负载方法,本研究采用硅烷偶联剂水解形成的硅醇缩合后与材料基底表面的形成Si—O—Si的作用键,在纤维表面接枝生成包覆层,使得催化剂和滤料能牢固地结合在一起。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、红外(FTIR)、CO-SCR活性评价等对其结构和性能进行了研究。从SEM 照片显示,催化剂在滤料上分散均匀;复合滤料的XRD谱图表明多金属复合氧化物以无定形状态负载于滤料上。当质量比达到0.25时,复合滤料NO_x达到90%,200~260 ℃范围内,制备的CuMnCeO_x/KH550@HSF复合滤料具有良好的 NO_x脱除效果,在连续10 h的稳定性测试过程中,复合滤料催化效率无明显下降,催化性能稳定,催化剂负载牢固不易脱落。

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	张雅静
	刁永发
	蒋捷

关键词：高硅氧滤料选择催化还原表面接枝一体化脱除

Abstract： In order to develop a loading method with more general application range and stronger loading strength, Si—O—Si bond was formed between the silicon alcohol formed by hydrolysis of silane coupling agent and the substrate surface of the material, and the coating layer was grafted on the fiber surface, so that the catalyst and filter material could be firmly combined. Its structure and properties were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared (FTIR) and CO-SCR activity evaluation. It could be seen from SEM photos that the catalyst was evenly dispersed on the filter material. The XRD spectrum of the composite filter material showed that the polymetallic composite oxide was loaded on the filter material in an amorphous state. In addition, the conversion of NO_x of the composite filter material was 90%, when the mass ratio reached 0.25. The composite filter material had good NO_x removal effect in the range of 200~260 ℃. Furthermore, during the continuous 10 h stability test, the catalytic efficiency of the composite filter material did not decrease significantly, showing great resistance of catalytic performance.

Keywords： high silica filter material selective catalytic reduction (SCR) surface grafting integrated removal

Received 2021-11-19;

Fund:国家重点研究与发展资助项目(2018YFC0705300)。

Corresponding Authors: 刁永发,教授,E-mail:diaoyongfa@dhu.edu.cn。 Email: diaoyongfa@dhu.edu.cn

About author: 张雅静(1997-),女,硕士研究生,主要研究工业通风、大气污染净化。

引用本文:

张雅静, 刁永发, 蒋捷.接枝法CuMnCeO_x负载高硅氧滤料制备及脱硝性能研究[J]. 化学工业与工程, 2023,40(4): 23-30

ZHANG Yajing, DIAO Yongfa, JIANG Jie.Preparation and denitration performance of surface grafted CuMnCeO_x loaded high silica filter media[J]. Chemcial Industry and Engineering, 2023,40(4): 23-30

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