TY - JOUR
T1 - Removal of benzene by non-thermal plasma catalysis over manganese oxides through a facile synthesis method
AU - Guo, Hao
AU - Liu, Xin
AU - Hojo, Hajime
AU - Yao, Xin
AU - Einaga, Hisahiro
AU - Shangguan, Wenfeng
N1 - Funding Information:
Acknowledgments The authors would like to thank Hamada Shoma-san in Einaga-Hojo-lab for adjusting the non-thermal plasma system in this experiment. This work was financially supported by the National Key Research & Development Plan (2017YFC0211804).
Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/3/20
Y1 - 2019/3/20
N2 - Three manganese oxide catalysts (MnO x ) were synthesized via a simple method, and then they were introduced into the non-thermal plasma (NTP) system for benzene removal. The XRD and EXAFS results showed the MnO x were mainly in the Mn 3 O 4 phase, and from the analysis of N 2 adsorption/desorption isotherms, we knew the MnO x calcined at 250 °C (Mn250) had the largest surface area of 274.5 m 2 g −1 . Besides, Mn250 also exerted higher benzene adsorption capacity (0.430 mmol g −1 ) according to C 6 H 6 -TPD. O 2 -TPD indicated that Mn250 showed better oxygen mobility than Mn300. Moreover, by analyzing XPS results, it revealed that Mn250 exhibited rich abundant of surface adsorbed oxygen species (O ads ) and moderate ratio of Mn 4+ /Mn 3+ , and the reducibility temperature was also the lowest among all the MnO x catalysts drawn by H 2 -TPR profiles. As a result, Mn250 combined with NTP could remove 96.9% of benzene at a low input power of 3 W (benzene concentration 200 ppm, and GHSV 60,000 mL g cat. −1 h −1 ), performing the best catalytic activity among the three catalysts and plasma only. Furthermore, the “NTP + Mn250” system also produced the highest CO 2 concentration and lowest CO concentration in downstream, and the residual O 3 after catalytic reaction was also the lowest, that is to say, the synergistic effect between NTP and Mn250 was more effective than other catalysts in benzene removal. [Figure not available: see fulltext.].
AB - Three manganese oxide catalysts (MnO x ) were synthesized via a simple method, and then they were introduced into the non-thermal plasma (NTP) system for benzene removal. The XRD and EXAFS results showed the MnO x were mainly in the Mn 3 O 4 phase, and from the analysis of N 2 adsorption/desorption isotherms, we knew the MnO x calcined at 250 °C (Mn250) had the largest surface area of 274.5 m 2 g −1 . Besides, Mn250 also exerted higher benzene adsorption capacity (0.430 mmol g −1 ) according to C 6 H 6 -TPD. O 2 -TPD indicated that Mn250 showed better oxygen mobility than Mn300. Moreover, by analyzing XPS results, it revealed that Mn250 exhibited rich abundant of surface adsorbed oxygen species (O ads ) and moderate ratio of Mn 4+ /Mn 3+ , and the reducibility temperature was also the lowest among all the MnO x catalysts drawn by H 2 -TPR profiles. As a result, Mn250 combined with NTP could remove 96.9% of benzene at a low input power of 3 W (benzene concentration 200 ppm, and GHSV 60,000 mL g cat. −1 h −1 ), performing the best catalytic activity among the three catalysts and plasma only. Furthermore, the “NTP + Mn250” system also produced the highest CO 2 concentration and lowest CO concentration in downstream, and the residual O 3 after catalytic reaction was also the lowest, that is to say, the synergistic effect between NTP and Mn250 was more effective than other catalysts in benzene removal. [Figure not available: see fulltext.].
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U2 - 10.1007/s11356-019-04264-5
DO - 10.1007/s11356-019-04264-5
M3 - Article
C2 - 30701473
AN - SCOPUS:85063982752
SN - 0944-1344
VL - 26
SP - 8237
EP - 8247
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 8
ER -