8%载银丝光沸石对气态碘的吸附动力学研究

为了除去乏燃料后处理过程产生的放射性碘，本研究采用8%载银量的丝光沸石作为吸附剂，采用动态吸附法研究了在气体线速度、吸附柱高度、湿度和NO₂体积分数等因素下其对气态碘的吸附效果的影响。实验结果表明，气体线速度对饱和吸附容量几乎没有影响，在较低气体线速度条件下，吸附柱传质阻力会增大；吸附柱高度对传质阻力几乎没有影响，随着吸附柱高度的增加，饱和吸附容量有一定的提高；湿度不影响吸附效果；NO₂对吸附效果具有促进作用；Yoon-Nelson模型能够很好地拟合碘在8%载银丝光沸石吸附柱上的吸附过程。 

Study on Adsorption Kinetics of Gaseous Iodine by 8% Silver Loaded Mordenite

To remove radioactive iodine from spent fuel reprocessing, in this study, 8% silver loaded mordenite was used as the adsorbent, and the dynamic adsorption method was used to study the effects of gas linear velocity, adsorption column height, humidity and NO₂ volume fraction on the adsorption effect of gaseous iodine. The experiment results show that the gas linear velocity has little effect on the saturated adsorption capacity, and the mass transfer resistance of the adsorption column increases at lower gas linear velocity; The height of the adsorption column has little effect on the mass transfer resistance. With the increase of the height of the adsorption column, the saturated adsorption capacity increases to a certain extent; Humidity does not affect the adsorption effect; NO₂ can promote the adsorption effect; Yoon-Nelson model can well fit the adsorption process of iodine on 8% silver loaded mordenite adsorption column.