TY - JOUR
T1 - A novel array of double dielectric barrier discharge combined with Ti–Co catalyst to remove high-flow-rate toluene
T2 - Performance evaluation and mechanism analysis
AU - Cheng, Zhuowei
AU - Li, Chao
AU - Chen, Dongzhi
AU - Chen, Jianmeng
AU - Zhang, Shihan
AU - Ye, J.
AU - Yu, Jianming
AU - Dionysiou, Dionysios D.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/20
Y1 - 2019/11/20
N2 - A novel array double dielectric barrier discharge (ADDBD) combined with a TiO2/Al2O3-Co3O4/AC (Ti–Co) catalyst was applied to remove toluene. The effects of catalyst setting distance, catalyst combination mode, and process factors (including specific input energy, initial toluene concentration, and relative humidity) were investigated in terms of the toluene degradation efficiency (ηtoluene) and the selectivity of CO2 (SCO2). When the specific input energy was 65 J·L−1, the initial toluene concentration was 100 mg·m−3, and the relative humidity was 30%, the highest ηtoluene of 72% and SCO2 of 44% could be achieved with TiO2/Al2O3 10 cm and Co3O4/AC 20 cm downstream of the ADDBD. Based on the determination of active substances (e.g., O3, [rad]OH) and the catalyst activation mode, a synergistic effect of active substances and photon between the ADDBD and the Ti–Co catalyst was proposed for the removal of toluene. Finally, the biodegradability and toxicity of the outlet gas were evaluated, and the results showed that the outlet gas was more convenient for subsequent biopurification and less toxic to the surroundings after the treatment by the ADDBD combined with the Ti–Co catalyst.
AB - A novel array double dielectric barrier discharge (ADDBD) combined with a TiO2/Al2O3-Co3O4/AC (Ti–Co) catalyst was applied to remove toluene. The effects of catalyst setting distance, catalyst combination mode, and process factors (including specific input energy, initial toluene concentration, and relative humidity) were investigated in terms of the toluene degradation efficiency (ηtoluene) and the selectivity of CO2 (SCO2). When the specific input energy was 65 J·L−1, the initial toluene concentration was 100 mg·m−3, and the relative humidity was 30%, the highest ηtoluene of 72% and SCO2 of 44% could be achieved with TiO2/Al2O3 10 cm and Co3O4/AC 20 cm downstream of the ADDBD. Based on the determination of active substances (e.g., O3, [rad]OH) and the catalyst activation mode, a synergistic effect of active substances and photon between the ADDBD and the Ti–Co catalyst was proposed for the removal of toluene. Finally, the biodegradability and toxicity of the outlet gas were evaluated, and the results showed that the outlet gas was more convenient for subsequent biopurification and less toxic to the surroundings after the treatment by the ADDBD combined with the Ti–Co catalyst.
KW - ADDBD
KW - Active substances
KW - Post-plasma treatment
KW - Synergistic mechanism
KW - Toluene
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U2 - 10.1016/j.scitotenv.2019.07.318
DO - 10.1016/j.scitotenv.2019.07.318
M3 - Article
C2 - 31539998
AN - SCOPUS:85069643383
SN - 0048-9697
VL - 692
SP - 940
EP - 951
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -