Mechanism study on chlorobenzene degradation by non-thermal plasma coupled with Mn-Co/HZSM-5 catalyst.

Chlorobenzene, a chlorinated aromatic hydrocarbon compound, is widely used in industries such as dyeing, pharmaceuticals, and rubber production. Its release into the atmosphere poses significant environmental risks. Exposure to chlorobenzene can lead to symptoms like headaches and respiratory distress, as well as damage to the liver and central nervous system, with potential carcinogenic effects. In this study, a series of Mn-Co/HZSM-5 catalysts were prepared using the impregnation method and combined with non-thermal plasma (NTP) technology to degrade chlorobenzene efficiently. The results demonstrated that the Mn1Co2/HZSM-5 catalyst achieved a 100% degradation rate of chlorobenzene at a specific input energy (SIE) of 1803.34 J·L⁻1, with CO2 selectivity increasing to 51.90%. Additionally, the formation of NO2 and O3 was significantly suppressed. Characterization techniques such as XPS and BET revealed the synergistic effect between Mn and Co, which promoted the generation of oxygen vacancies. These findings provide new insights for optimizing volatile organic compound (VOC) treatment technologies.