用改性活性碳纤维去除CO_2原料气中的H_2S

Removal of H_2S from CO_2 Feed Gas Using Modified Activated Carbon Fiber

采用固定床动态吸附实验,用改性活性碳纤维(ACF)吸附去除CO2原料气中的H2S。通过改变改性剂种类、反应温度和原料气中CO2浓度,找出用改性ACF去除CO2原料气中H2S的规律。实验结果表明:常温下,可用NaON改性的ACF来消除CO2的酸性对去除H2S的不利影响;随着反应温度的升高,CO2与ACF形成的C(O*)中间产物增多,CO2的存在有利于改性ACF去除H2S;而当反应温度过高时,CO2与ACF形成的C(O*)中间产物发生分解,导致ACF碳化,不利于H2S的吸附去除。

Modified activated carbon fiber （ACF） was used to remove H2S from CO2 feed gas in the experiments on dynamic adsorption in a fixed-bed reactor. The rule for H2S removal was found by means of altering the modifier, the reaction temperature and the CO2concentration in the feed gas. The experimental results show that： At room temperature, ACF modified with NaON can be used to avoid the adverse effect of acidic CO2 on H2S removal; With the rising of reaction temperature and the augmentation of the quantity of intermediate products C （O＊） generated from CO2 and ACF, the presence of CO2will be in favor of the H2S removal by modified ACF; But when the reaction temperature is too high, the intermediate products C（ O＊ ） will be decomposed, which can lead to the carbonization of ACFs and will be adverse to H2S removal.