To gain insights into N₂O recovery from industrial effluent, adsorption equilibria and kinetics of N₂O, O₂, N₂, and CO₂ on silica gels were evaluated at 293, 308, and 323 K under pressures of up to 1000 kPa using a volumetric method. Adsorption characteristics of the adsorbates on silica gel were compared with those on activated carbon. Adsorption isotherms indicated lower adsorption amounts for all of the adsorbates on silica gel, compared to those on activated carbon; both materials adsorbed higher amounts of N₂O and CO₂ than O₂ and N₂. In the case of silica gel, CO₂ was adsorbed more strongly than N₂O, while activated carbon exhibited the opposite. The experimental uptake on silica gel was well fitted by the non-isothermal diffusion model. The adsorption rate on silica gel was slower than that on activated carbon for all the adsorbates, while the order of adsorption rate was the same: N₂ > O₂ ≫ N₂O ≥ CO₂. The uptake results of N₂O on varying sizes of silica gel indicated that macropore diffusion significantly affected adsorption on silica gel, which was not the case for activated carbon. The adsorption characteristics of N₂O and CO₂ on silica gel were distinct from those on activated carbon, due to the inherent electrical properties and molecular structural interactions of the adsorbent and adsorbates.

为了深入了解成N ₂从工业污水，吸附平衡以及N动力学O恢复₂ O，O- ₂，N ₂和CO ₂下向上的压力在二氧化硅凝胶在293评估，308，和323 K至1000千帕使用体积法。将吸附物在硅胶上的吸附特性与活性炭上的吸附特性进行了比较。吸附等温线表明，与活性炭相比，硅胶上所有吸附物的吸附量均较低；两种材料吸附较高量的N个₂ O和CO ₂为O ₂和N ₂。对于硅胶，CO ₂N ₂ O比N ₂ O吸附更强，而活性炭则相反。非等温扩散模型很好地拟合了硅胶的实验吸收量。在硅胶上吸附率比上的所有吸附活性炭比较慢，而吸附率的顺序是一样的：N ₂  > 0 ₂ »N ₂ ö≥CO ₂。N ₂ O在不同大小的硅胶上的吸收结果表明，大孔扩散会显着影响硅胶上的吸附，而活性炭则不然。N ₂ O和CO ₂的吸附特性 由于吸附剂和被吸附物的固有电学性质以及分子结构相互作用，硅胶上的活性炭与活性炭上的活性炭不同。