| Title: | High ratio of Ce(3+)/(Ce(3+)+Ce(4+)) enhanced the plasma catalytic degradation of n-undecane on CeO(2)/gamma-Al(2)O(3) |
| Author(s): | Xia T; Yao S; Wu Z; Li G; Li J; |
| Address: | "School of Environmental and Safety Engineering, Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu 213164, China. School of Environmental and Safety Engineering, Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu 213164, China. Electronic address: yaos@cczu.edu.cn. Engineering Research Center of Construction Technology of Precast Concrete of Zhejiang Province, Hangzhou 310018, China. School of Environmental and Safety Engineering, Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu 213164, China; Engineering Research Center of Construction Technology of Precast Concrete of Zhejiang Province, Hangzhou 310018, China. Electronic address: leeking@aliyun.com" |
| DOI: | 10.1016/j.jhazmat.2021.127700 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "n-Undecane (C11) is the main component of volatile organic compounds (VOCs) emitted from the printing industry, and its emission to the atmosphere should be controlled. In this study, a dielectric barrier discharge reactor coupled with CeO(2)/gamma-Al(2)O(3) catalysts was used to degrade C11. The effect of the chemical state of CeO(2) on C11 degradation was evaluated by varying the CeO(2) loading on gamma-Al(2)O(3). The C11 conversion and COx selectivity were as high as 92% and 80%, respectively, under mild reaction conditions of energy density 34 J/L and 423 K to degrade 134 mg/m(3) C11 in a simulated air using 10 wt%CeO(2) impregnated on gamma-Al(2)O(3). After analyses using in-situ plasma diffuse reflectance Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry, it was found that most of C11 were degraded to CO(2), and the main by-products on catalyst surfaces were alcohols and ketones. It was concluded from X-ray photoemission spectroscopy that the good performance of the 10 wt%CeO(2)/gamma-Al(2)O(3) catalyst was due to its high Ce(3+)/(Ce(3+)+Ce(4+)) ratio as well as the oxygen vacancies. The Ce(3+)/(Ce(3+)+Ce(4+)) ratio of CeO(2) on gamma-Al(2)O(3) is crucial for the degradation of C11, providing a further roadmap for the plasma catalytic oxidation of alkanes" |
| Keywords: | Ce(3+)/(Ce(3+)+Ce(4+)) ratio CeO(2)/gamma-Al(2)O(3) In-situ plasma DRIFTS Plasma catalysis n-Undecane degradation; |
| Notes: | "PubMed-not-MEDLINEXia, Tongtong Yao, Shuiliang Wu, Zuliang Li, Guojian Li, Jing eng Netherlands 2021/11/21 J Hazard Mater. 2022 Feb 15; 424(Pt D):127700. doi: 10.1016/j.jhazmat.2021.127700. Epub 2021 Nov 5" |
