活性炭改性及其对乙硫醇吸附性能的研究

The Study of Modifying of Activated Carbon and the Adsorption Properties of Ethyl-mercaptan

以活性炭为基础吸附剂,考察不同类型活性炭的吸附性能以及不同改性方法对活性炭吸附性能的影响。乙硫醇的吸附性能通过变压吸附装置所得的穿透曲线评价。采用低温氮气吸附脱附表征吸附剂的比表面积和孔径分布;结果显示椰壳活性炭具有较大的吸附量。通过氧化、酸碱和浸渍金属离子改性椰壳活性炭发现,负载铁离子的吸附性能最好,吸附量为122.4mg/L,提高幅度为48.5%。

Activated carbon was used as a basic adsorbent. Different kinds of activated carbon, diverse acid- base modifying were employed to find an activated carbon which had well adsorbed properties. The adsorp- tion properties were evaluated by breakthrough curves which were measured by an dynamic adsorption e- quipment. The surface area and pore size distribution of them were determined by low temperature N2 ad- sorption desorption （BET）. The results showed that the coconut shell activated carbons had high capacity. the coconut shell activated carbons was modified by oxidation, acid/base and impregnation methods, the activated carbon impregnation with iron had the best adsorption performance, and its Adsorption amount was 122. 4 mg/L, which was 48. 50/6o higher than that of the unmodified activated carbon.