Synergistic catalytic ozonation of toluene with manganese and cerium varies at low temperature

• Published in: Chinese chemical letters 2022-05, Vol.33 (5), p.2726-2730
• Main Authors: Gan, Qi, Fu, Mingli, Liu, Peng, Zhang, Yuchen, Xiong, Juxia, Zhong, Jinping, Liu, Lei, Wu, Junliang, Niu, Xiaojun, Hu, Yun, Ye, Daiqi
• Format: Article
• Language: English
• Subjects: Active oxygen species; Oxygen vacancy; Ozone; Pathway; Synergism
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2021.09.006

The temperature of waste gas in refuse transfer station, airport smoking area, and RTO terminal is low, which needs deep oxidation. Catalytic ozonation is one of the most effective treatment techniques in these scenarios. In this study, we reported that catalysts were modified under the condition of magnetic field to simulate the low temperature dynamic conditions of low concentration toluene for catalytic ozonation. This paper aims to explore the relationship between oxygen vacancy and active oxygen species, and the specific pathways of toluene oxidation. The study found that citric acid can enhance the synergistic effect between Mn and Ce, and promote the generation of oxygen vacancies. The surface molecule adsorption oxygen is more conducive to catalytic oxidation than subsurface atom adsorption oxygen. Finally, we proposed the main pathways of toluene in this reaction system, which runs through the whole process of the reaction. The catalytic ozonation of toluene was carried out in the range of low temperature and dynamic conditions. The main intermediates of toluene were varied under the synergistic effects of Mn and Ce, ozone and catalyst. [Display omitted]