Degradation of PCDD/Fs in Fly Ash by Vortex-shaped Gliding Arc Plasma |
| |
| Authors: | Yong Ren Xiaodong Li Liang Yu Kui Cheng Jianhua Yan Changming Du |
| |
| Affiliation: | 1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang, China
2. School of Environmental Science and Engineering, Sun Yat-Sen University, 510275, Guangzhou, China
|
| |
| Abstract: | PCDD/Fs in fly ash from municipal solid waste incinerators (MSWIs) can be decomposed in non-thermal plasma, more in particular in a vortex-shaped gliding arc. Typical operating conditions are 10 kV voltage, 40 kΩB external current-limited resistor, 11 L/min tangential gas and 2 L/min axial carrier gas flow rates. Degradation efficiencies of PCDD/Fs are respectively 54.9, 61.7 and 66.8 % on mass basis and 60.7, 73.3 and 70.1 % on toxicity basis under N2, air and O2 condition. After treatment the morphology of fly ash has changed: needle-shaped crystals increasing, pores and fragments appearing and high-temperature melting showing which is leaded by direct contact with high-temperature core of arc. The results are explained tentatively by the creation of reactive intermediates leading to dechlorination and oxidation of PCDD/Fs and finally producing end-products such as CO2, CO, HCl and CH4. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
