DEGRADATION OF XYLENE BY DBD PLASMA IN COLLABORATION WITH Mn-TiO2/γ-Al2O3 CATALYST

LI Ru; LI Xiaokang; FENG Yan; WANG Xueyan; XING Qianyun

doi:10.13205/j.hjgc.202404019

Volume 42 Issue 4

Apr. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(4): 157-166

LI Ru, LI Xiaokang, FENG Yan, WANG Xueyan, XING Qianyun. DEGRADATION OF XYLENE BY DBD PLASMA IN COLLABORATION WITH Mn-TiO2/γ-Al2O3 CATALYST[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 157-166. doi: 10.13205/j.hjgc.202404019

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LI Ru, LI Xiaokang, FENG Yan, WANG Xueyan, XING Qianyun. DEGRADATION OF XYLENE BY DBD PLASMA IN COLLABORATION WITH Mn-TiO₂/γ-Al₂O₃ CATALYST[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 157-166. doi: 10.13205/j.hjgc.202404019

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DEGRADATION OF XYLENE BY DBD PLASMA IN COLLABORATION WITH Mn-TiO₂/γ-Al₂O₃ CATALYST

doi: 10.13205/j.hjgc.202404019

School of Environmental Science and Chemical Engineering, Xi’an Polytechnic University,Xi’an 710048, China

Received Date: 2023-04-07
Available Online: 2024-06-01

Abstract

Abstract

In this study, Mn-TiO₂/γ-Al₂O₃ catalyst was prepared by impregnation method to degrade xylene with dielectric barrier discharge (DBD) plasma. The oxidation properties of xylene in DBD plasma under different discharge power, initial mass concentration, and gas flow were studied. The catalyst was characterized by XRD and FT-IR to analyze the crystal shape and properties of the catalyst before and after DBD plasma discharge. The results showed that under the conditions of discharge power of 20 W, inlet concentration of xylene 38.62 mg/m³ and inlet flow rate of 0.65 L/min, the degradation efficiency of xylene reached 75.8% and the energy efficiency of the reactor was 0.1027 g/(kW·h) after adding Mn-TiO₂/γ-Al₂O₃ catalyst. At the same time, ozone concentration was reduced to 36.94 mg/m³. The characterization results showed that the crystal shape and properties of the catalyst were not changed before and after the DBD plasma discharge. To further analyze the intermediate products produced in the process of degradation of xylene, FT-IR, GC-MS, and emission spectroscopy were used for diagnosis. It was found that the types and quantity of intermediate products decreased, the emission spectral intensity increased, and the number of characteristic spectral lines increased after adding catalyst. This study can provide a theoretical reference for the performance optimization and catalyst selection of DBD plasma in the application of xylene degradation.
- DBD plasma,
- xylene,
- catalyst,
- plasma diagnosis

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References

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