A comparison study of toluene removal by two-stage DBD-catalyst systems loading with MnO x , CeMnO x , and CoMnO x
2015
Huang, Yifan | Dai, Shaolong | Feng, Fada | Zhang, Xuming | Liu, Zhen | Yan, Keping
This paper studies the toluene removal by a two-stage dielectric barrier discharge (DBD)-catalyst system with three catalysts: MnO ₓ /ZSM-5, CoMnO ₓ /ZSM-5, and CeMnO ₓ /ZSM-5. V-Q Lissajous method, Brunauer–Emmett–Teller (BET) surface area, X-ray diffraction (XRD), and X-ray photoelectron (XPS) are used to characterize the DBD and catalysts. The DBD processing partially oxidizes the toluene, and the removal efficiency has a linear relationship with ozone generation. Three DBD-catalyst systems are compared in terms of their toluene removal efficiency, Fourier transform infrared (FTIR) spectra, carbon balance, CO selectivity, CO₂ selectivity, and ozone residual. The results show that the DBD-catalyst system with CoMnO ₓ /ZSM-5 performs better than the other two systems. It has the highest removal efficiency of about 93.7 %, and the corresponding energy yield is 4.22 g/kWh. The carbon balance and CO₂ selectivity of CoMnO ₓ /ZSM-5 is also better than the other two catalysts. The measurements of two important byproducts including aerosols and ozone are also presented.
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