【摘要】 NO的排放严重影响大气环境,其溶解度低不易被液相吸收。芬顿法产生的羟基自由基氧化性极强但寿命很短,超重力机具有混合速率快、液体停留时间短的特点,该文创新性地结合二者优势,对NO气体进行液相氧化吸收。分别研究了芬顿溶液pH值、浓度、H₂O₂与Fe²⁺浓度比值、超重力机转速以及NO与芬顿溶液体积流量比等条件对NO脱除效果的影响。超重力机双进液口处即时混合H₂O₂与Fe²⁺溶液,在1 400 r/min转速下使用pH=2,H₂O₂浓度0.2 mol/L,H₂O₂与Fe²⁺浓度比为4的芬顿溶液对NO的脱除效果最优。当H₂O₂与Fe²⁺液流量均为15 L/h,500×10-6 NO气流量为200 L/h时,NO的脱除效率可以达到75%。更多还原

【Abstract】 NO, due to its low solubility, is not easily absorbed by liquid. To remove NO, oxidation and absorption of NO by Fenton method was used together with a rotating packed bed, the super-gravity machine, during which hydroxyl radicals pro-duced by Fenton reaction had super high oxidative properties with very short lifetime, while the rotating packed bed gave rise to quick mixing rate and short liquid residence time. In this paper, parameters affecting NO removal were studied including pH, concentration of Fenton solution, and ratio of H₂O₂ to Fe²⁺, as well as the rotor speed of super-gravity machine. When operating under the optimum condition, H₂O₂ and Fe²⁺ blended at the very edge of reactor inlet, and pH=2, H₂O₂ concentration was 0.2 mol/L, ratio of H₂O₂ to Fe²⁺4, and rotor speed being 1 400 r/min. When flow rates of H₂O₂ and Fe²⁺were the same 15 L/h and flow rate of NO of 500×10-6 was 200 L/h, NO removal efficiency could be as high as 75%.更多还原