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| Degradation of Formaldehyde by High Voltage Pulse Discharge Combined with Compound Catalyst |
| Dong Bingyan1, Gan Qingqing1, Sun Yu1, He Junwen1, Xie Wenjuan2 |
1. School of Resources and Environmental Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;
2. School of Mechanical and Electrical Engineering Jiangxi University of Science and Technology Ganzhou 341000 China |
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Abstract Combined with composite catalyst, high voltage pulse discharge was adopted to degraded formaldehyde. The Ti-Mn catalysts were synthesized by sol-gel method and impregnation- sol-gel methods step by step, and XRD, SEM, FT-IR were used to describe the properties of the prepared catalysts. In addition, the influences of the added amount of Ti and the loading sequence of Ti, Mn in catalysts on the degradation rate of the formaldehyde were investigated. Meanwhile, the effects of the pulse discharge on the catalyst’s structure and morphology were also analyzed due to the characterization. The results showed that the optimal conditions for the formaldehyde degradation by prepared catalysts were 24kV of the pulse discharge voltage, 40Hz of the pulse discharge frequency, and 1∶4 of Ti to Mn for TiO2-MnOx/γ-Al2O3. The removal rate of formaldehyde reached 97.5% under the best condition. The pulse discharge could change the structure and morphology of catalysts. The roughness of the surface of TiO2-MnOx/γ-Al2O3 decreased, while small micropore increased after the pulse discharge. Besides, the discharge plasma improved catalytic activity and active adsorption sites of the catalysts, resulting in higher removal rate of formaldehyde.
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Received: 03 June 2016
Published: 02 May 2017
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2017, Vol. 32 
