关键词: 氧化铁, 硫化氢, 氨水, 氧化铝, 十六烷基三甲基溴化铵

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