Removal of SO₂ and NO emissions from coal-fired power plants have always been the focus in coal's utilization industries for which traditional wet desulfurization system hold the potential to achieve simultaneous removal of SO₂/NO_x. In this work, a novel liquid catalyst (tributyl phosphate, TBP) was investigated for the simultaneous removal of SO₂ and NO_x in a NO pre-oxidation (ozone oxidation) assisted process. The absorption process and reaction mechanism of SO₂ and NO₂ were studied in a small-scale experimental system, and the removal efficiency of pollutant and the key parameters were examined in a pilot-scale system. The results show that the removal efficiency of NO₂ in traditional wet desulfurization system is only 20–40%; however greatly increases to >90% when TBP is added. Moreover, TBP can enhance the NO₂ removal performance in the presence of SO₂ due to the formation of TBP–NO₂–SO₃²⁻ complex. Considering the oily nature of TBP that can be easily separated, such addition strategy hold great potential for industrial SO₂/NO_x simultaneously removal.

燃煤电厂的SO ₂和NO排放去除一直是煤炭利用行业的重点，传统的湿式脱硫系统具有同时实现SO ₂ / NO _x去除的潜力。在这项工作中，研究了一种新型的液态催化剂（磷酸三丁酯，TBP），用于在NO预氧化（臭氧氧化）辅助过程中同时去除SO ₂和NO _x。SO ₂和NO ₂的吸收过程及反应机理在小型实验系统中进行了研究，并在中试系统中研究了污染物的去除效率和关键参数。结果表明，传统湿法脱硫系统中NO ₂的去除效率仅为20-40％。但是，当添加TBP时，大大增加到> 90％。此外，由于TBP-NO ₂ -SO ₃ ^2-的形成，TBP可以在SO ₂存在下提高NO _2的去除性能。考虑到TBP的油性易于分离，因此这种添加策略具有同时去除工业SO ₂ / NO _x的巨大潜力。