Abstract: The iron oxide adsorbent，which was modified by aluminum oxide，was prepared by coprecipitation method，and the adsorbents were characterized by specific surface area (BET) analysis and X-ray diffraction (XRD). The effect of preparation conditions and adsorption conditions on the performance of adsorbents in the removal of H2S were studied using a fixed adsorption bed. The experimental results showed that：the adsorption capacity of the iron oxide for the removal of H2S was improved significantly by aluminum oxide introduction. The absorbent with iron oxide to aluminum oxide mass ratio of 1∶0.5，and the CTAB mass fraction of 2%，calcination temperature of 500 ℃，was found to be the best. At the gas velocity of 20 mL/min，and adsorption desulfurization temperature of 80℃，the desulfurization rate and penetrate sulfur capacity reached 99.3% and 105mg/g，respectively. Compared with unmodified iron oxide，the penetrate sulfur capacity of the aluminum oxide modified iron oxide was improved by 49.8 mg/g.

Key words: iron oxide, H2S, ammonia water, aluminum oxide, CTAB

摘要： 采用共沉淀法制备了氧化铝改性的氧化铁吸附剂，并采用比表面积（BET）、X射线衍射（XRD）技术对吸附剂进行了表征。在固定吸附床上，考察了制备条件及吸附条件对吸附剂脱除硫化氢性能的影响。结果表明，引入氧化铝能显著提高氧化铁对硫化氢的吸附净化能力。氧化铁与氧化铝质量比为1∶0.5，造孔剂十六烷基三甲基溴化铵（CTAB）质量分数为2%，焙烧温度500 ℃时，采用共沉淀法的负载氧化铝吸附剂的吸附效果最好。在气速20 mL/min，吸附温度80 ℃时，脱硫率和穿透硫容可分别达到99.3%和105 mg/g，其穿透硫容比未经改性的活性氧化铁提高了49.8 mg/g。

关键词: 氧化铁, 硫化氢, 氨水, 氧化铝, 十六烷基三甲基溴化铵