Adsorption is a commonly used method for gas pollutant removal. The adsorption performances of four commercial adsorbents have been compared in this work through a fixed-bed reactor. The single gas adsorption results show that zeolite is more effective for SO₂, NO, and CO₂ removal among the four adsorbents. SO₂, NO, and CO₂ are mainly monolayer adsorbed on adsorbents. Physically adsorbed SO₂ is the main adsorption species on 13X zeolite, 5A zeolite, and mesoporous alumina according to TPD-MS, while SO₂ is more easily oxidized on activated carbon than the other adsorbents. NO can be oxidized more easily on zeolite than activated carbon. Only physically adsorbed CO₂ is detected on these adsorbents. Multicomponent adsorption is investigated on 13X zeolite and activated carbon. For gas adsorption on 13X zeolite, the inhibitive effect of NO on SO₂ is 26.3% higher than that of CO₂ on SO₂, indicating that NO plays a dominant role in SO₂ adsorption. Physically adsorbed NO is the only NO adsorption species on 13X when SO₂ exists, showing NO oxidation on 13X is greatly inhibited by SO₂. For gas adsorption on activated carbon, chemically adsorbed SO₂ increases largely after NO is put in, showing that the promotive effect of NO on SO₂ is mainly for the chemically adsorbed SO₂. In the presence of SO₂, chemically adsorbed NO almost disappeared, which indicates that SO₂ mainly dominates chemically adsorbed NO on activated carbon. The effects of adsorbent performance on multicomponent gas adsorption are reflected by the gas adsorption mechanism. These findings provide considerable specific information for industrial flue gas purification.

中文翻译：

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SO ₂，NO和CO ₂在商业吸附剂上的吸附种类分布及多组分吸附机理

吸附是去除气体污染物的常用方法。通过固定床反应器比较了四种商业吸附剂的吸附性能。单一气体吸附结果表明，沸石对四种吸附剂中的SO ₂，NO和CO ₂去除更有效。SO ₂，NO和CO ₂主要是单层吸附在吸附剂上的。根据TPD-MS，物理吸附的SO ₂是在13X沸石，5A沸石和中孔氧化铝上的主要吸附物质，而SO ₂则比其他吸附剂更容易在活性炭上氧化。与活性炭相比，NO在沸石上的氧化更容易。仅物理吸附的CO ₂在这些吸附剂上被检测到。研究了13X沸石和活性炭对多组分的吸附。对于13X沸石上的气体吸附，NO对SO ₂的抑制作用比CO ₂对SO ₂的抑制作用高26.3％，表明NO在SO ₂吸附中起主要作用。当存在SO ₂时，物理吸附的NO是13X上唯一的NO吸附物种，这表明SO ₂大大抑制了13X上的NO氧化。对于气体在活性炭上的吸附，加入NO后化学吸附的SO ₂大大增加，这表明NO对SO ₂的促进作用主要是化学吸附的SO _2。。在存在SO ₂的情况下，化学吸附的NO几乎消失了，这表明SO ₂在活性炭上的化学吸附NO中起主要作用。气体吸附机理反映了吸附剂性能对多组分气体吸附的影响。这些发现为工业烟气净化提供了相当具体的信息。