微纳米气液分散体系氧化脱除天然气汽车尾气中的复合污染物

采用微纳米气液分散体系对天然气汽车尾气中的复合污染物进行氧化脱除.实验结果表明:CH4、NO和SO2的脱除率均随着吸收液中NaCl、十二烷基硫酸钠(SDS)、Fe2+和Mn2+投加量的增加而先升后降,在酸性和碱性条件下均随着pH的增大呈先升后降的趋势;进气CH4、NO、SO2质量浓度为429,267,571 mg/m3...

Oxidation removal of multiple pollutants from natural gas vehicle exhaust in micro-nano gas-liquid dispersion system

The micro-nano gas-liquid dispersion system was used to oxidize and remove multiple pollutants in the exhaust gas of natural gas vehicles. The experimental results show that：The removal rate of CH₄,NO and SO₂ increase firstly and then decreased with the increase of NaCl,SDS,Fe²⁺,and Mn²⁺ amount,and with the increase of pH under acidic or alkaline conditions;When the mass concentration of CH₄,NO,SO₂ in the inlet gas is 429,267,571 mg/m³,under the optimum removal conditions of absorbent pH 6,NaCl amount 0.5 g/L,SDS amount 4 mg/L and Mn²⁺ amount 2.0 mmol/L,the removal rate of CH₄,NO,and SO₂ are 85.83%,96.00%,and 100%,respectively. The results of mechanism researches indicate that：With radicals generated from micro-nano bubbles,CH₄ is oxidized into CO,CO₂ and H₂O,NO intoand,SO₂ into;Fe²⁺ and Mn²⁺ are used as catalysts to induce micro-nano bubbles to generate more free radicals.