本文研究了经O_2,空气或HNO_3氧化后,高温下热处理改性的活性炭纤维（Acti-vated Carbon Fiber,ACF）在O_2和水蒸气存在下脱除SO_2的能力,结果表明,氧化热处理改性后,ACF的脱硫能力都有明显提高,其中O_2改性的ACF脱硫活性最高,HNO_3改性的ACF最低,空气改性的ACF居中,并对改性ACF具有不同脱硫活性的原因进行了分析。TPD实验表明,H_2SO_4从O_2改性ACF上脱除最容易 In this paper, the ability of Acti-vated Carbon Fiber (ACF) modified by heat treatment at high temperature after O 2, air or HNO 3 oxidation was studied in the presence of O 2 and water vapor. The results showed that after the oxidative heat treatment , The desulfurization capacity of ACF has been significantly improved. Among them, the desulfurization activity of ACF modified by O_2 is the highest, the ACF modified by HNO_3 is the lowest, the ACF modified by air is the middle one, and the reasons for the different ACF desulfurization activity are analyzed. TPD experiments show that H_2SO_4 is most easily removed from O_2 modified ACF