Oxidation of TCE by Combining Perovskite-Type Catalyst With DBD
| Autor: | Cheng Bin He, Moo Been Chang, Kuan Lun Pan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Trichloroethylene Chemistry Inorganic chemistry chemistry.chemical_element Manganese Nonthermal plasma Condensed Matter Physics 01 natural sciences Mineralization (biology) Redox 010305 fluids & plasmas Catalysis chemistry.chemical_compound Nickel 0103 physical sciences Perovskite (structure) |
| Zdroj: | IEEE Transactions on Plasma Science. 47:1152-1163 |
| ISSN: | 1939-9375 0093-3813 |
| Popis: | A novel hybrid system constituting of La–Mn-based perovskite-type catalyst with nonthermal plasma (NTP) is developed and evaluated for the removal of trichloroethylene (TCE) from gas streams. Ce and Ni were used as promoter for modification LaMnO3 because addition of Ce and Ni could enhance redox property and activity of catalyst. First, the activities of various perovskites including LaMnO3, La0.8Ce0.2MnO3, and La0.8Ce0.2Mn0.8Ni0.2O3 were evaluated for TCE removal via catalysis, and the results indicate that La0.8Ce0.2Mn0.8Ni0.2O3 has the highest activity for TCE removal among three perovskites prepared. The three perovskites are individually combined with NTP to form various plasma catalysis systems for TCE removal. Experimental results indicate that 100% TCE removal efficiency can be achieved with plasma catalysis (La0.8Ce0.2Mn0.8Ni0.2O3) when the system is operated with the applied voltage of 16 or 17 kV. On the other hand, the highest TCE removal efficiency achieved with NTP alone is 73.2% with the applied voltage of 17 kV. In addition, CO2 mineralization efficiencies achieved with plasma catalysis combined with La0.8Ce0.2Mn0.8Ni0.2O3 (31.1%–46.6%) are significantly higher than that of NTP alone (8.4%–13.1%). It is worth noting that concentrations of O3 and NO x generated with plasma catalysis are significantly lower than that of NTP alone, implying that formation of O3 and NO x could be effectively decomposed as plasma catalysis is applied for TCE removal. Overall, perovskite-type catalyst can be integrated with NTP to form plasma catalysis system for effective removal of TCE from gas streams. |
| Databáze: | OpenAIRE |
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