Abstract:

The modification of industrial activated carbon 4^#（AC4）with impregnated KOH and the adsorption capacities of KOH，Na₂CO₃，KI toward carbonyl sulfide（COS）were studied and compared，leading to the result：KOH＞Na₂CO₃＞KI. The effects of reaction conditions were investigated. The fresh activated carbon and modified activated carbon before and after COS adsorption were characterized by SEM-EDS. The results showed that 10%（w%）of KOH was the best impregnation and the optimum condition was at 60 ℃ with 1.0% of oxygen content. Furthermore，SEM-EDS distribution indicated that the result of adsorption became obviously better by the change of pore structure of modified activated carbon and the formation of surface active materials.

摘要：

以工业4^#活性炭（AC4）为载体，制备KOH改性活性炭，对比研究了KOH、Na₂CO₃、KI改性活性炭在相同条件下吸附净化羰基硫（COS）的性能，为KOH＞Na₂CO₃＞KI；考察了反应条件对吸附净化COS气体的影响；并对空白活性炭、新鲜改性活性炭和吸附后改性活性炭作SEM-EDS表征分析。结果表明，质量分数为10%的KOH是最佳浸渍液，反应温度60 ℃、氧含量1.0%为改性活性炭的最佳反应条件。结合SEM-EDS表征分析表明：改性活性炭孔结构的变化和表面活性物质的生成使其对COS的吸附净化效果增强。