Xylene is a toxic volatile organic compound (VOC) and one of the common industrial pollutants. Catalytic oxidation can decompose xylene into CO₂ and H₂O, effectively preventing harmful gases from being emitted into the atmosphere. The key to the removal of xylene by catalytic oxidation is the low temperature activity and reaction stability of the catalyst. This article introduces the research progress in low-temperature oxidation of xylene with effects of supported noble metal catalysts, non-noble metal oxides and perovskite-type oxide catalysts from the aspects of catalyst preparation methods, structure-activity relationship, interaction between active components and the interaction mechanism with the supports on the catalytic performance. In addition, the catalytic effects on xylene and other VOCs of different catalyst types are compared and analyzed. Finally, the research results of mixed VOCs containing xylene are introduced and suggestions are made on the related issues of future catalyst research.

Contents

1 Introduction

2 Supported noble metal catalyst

2.1 Catalysts with inert carriers

2.2 Catalysts with active carriers

2.3 Catalysts with zeolite carriers

3 Metal oxide catalyst

3.1 Manganese-based catalysts

3.2 Cerium-based catalysts

3.3 Cobalt-based catalysts

3.4 Mixed-metal catalysts

3.5 Perovskite catalysts

4 Catalytic oxidation of VOCs mixtures containing xylene

5 Conclusion and outlook