Abstract:

Mesoporous materials SBA-15 modified by different transition metals，including Zn、Fe、Mn、Cu、Co and Ni，were synthesized by impregnation method respectively. The prepared materials were characterized by XRD and BET. Among these six adsorbents，Zn/SBA-15 showed the highest H₂S breakthrough capacity of 29.7 mg·g ^-1adsorbent with 23 wt% loading of zinc. The effect of the gas flow rate，adsorption temperature，the affects of the exit of carbon dioxide and oxygen were also investigated. Zn/SBA-15 could be recycled for four times at 573 K in air environment，and its breakthrough capacity remained same.

摘要：

以介孔材料SBA-15为载体、过渡金属（Zn、Fe、Mn、Cu、Co和Ni）氧化物为活性组分，用等体积浸渍法制备了过渡金属氧化物负载型介孔脱硫剂，通过XRD和比表面积测定对其进行表征。结果显示，Zn负载的SBA-15对H₂S吸附效果最好；Zn离子负载量为23%时，Zn/SBA-15对H₂S穿透吸附量最大，为29.7 mg/g吸附剂；考察流速、反应温度以及杂质气体存在对Zn/SBA-15吸附脱除低浓度H₂S的影响，并研究了Zn/SBA-15吸附脱除H₂S的再生性能，结果表明在空气氛围下，Zn/SBA-15吸附剂在573 K可再生，循环使用4次穿透硫容不发生变化。