载银丝光沸石和载银氧化铝对气态碘的吸附研究

针对核设施产生的高湿度、高氮氧化物含碘气体设计一套动态吸附装置,制备了用于吸附气态碘的载银丝光沸石和载银氧化铝,通过改变吸附剂载银量及碘蒸汽的浓度,研究载银丝光沸石和载银氧化铝对气态碘的吸附性能。实验结果表明:实验温度为30℃,相对湿度为100%,NO2体积含量为0.1%条件下,载银量15.2%的丝光沸石对碘的饱和吸附容量为178.4mg/g,载银丝光沸石对气态碘的吸附效果优于载银氧化铝;载银丝光沸石和载银氧化铝对气态碘的吸附是一个以化学吸附为主又包括物理吸附的复杂过程。

Study on Dynamic Adsorption of Gaseous Iodine by Silver Loaded Mordenite and Alumina

A dynamic adsorption device was designed for high humidity and high nitrogen oxide iodine gases produced by nuclear facilities. Silver-loaded mordenite and silver-loaded alumina were prepared for adsorbing gaseous iodine. The adsorption properties of silver-loaded mordenite and silver-loaded alumina for gaseous iodine were studied by changing the amount of silver and the concentration of iodine vapor. The experimental results show that the saturated adsorption capacity of iodine by mordenite with silver content of 15.2% is 178.4 mg/g under the conditions of 30℃, 100% relative humidity and 0.1% NO₂. The adsorption effect of silver-loaded mordenite on gaseous iodine is better than that of silver-loaded alumina. It is a complex process mainly based on chemical adsorption and physical adsorption.