TEDA浸渍剂应用及挥发性改进研究现状讨论

Discussion on the Application and Volatility Improvement of TEDA Impregnant

核电厂除碘吸附材料浸渍剂三乙烯二胺(TEDA)具有强挥发性,在室温条件下易升华,这一特性会对碘吸附器吸附性能造成负面影响。基于这一问题,针对除碘固体吸附技术、胺类化合物TEDA的替代浸渍剂、离子液体的研究展开大量调研,提出一种有效解决TEDA易挥发问题的途径——采用TEDA离子液体,并根据其结构特点,从理论上分析了其除碘可行性。结果表明,TEDA离子液体相较于TEDA在结构上进行改性,其通过季胺化优化了耐温性能,但不会影响其和CH_(3)I的化学反应路径,初步判断TEDA离子液体可以作为TEDA除碘浸渍剂的替代材料展开更深入的研究。

Triethylenediamine(TEDA)is highly volatile and is easy to sublimate at room temperature,which negatively affects the adsorption performance of the iodine adsorbent.Based on this problem,the iodine adsorption technology,alternative materials of TEDA and ionic liquids were studied.On this basis,an effective approach to address the volatile problem of TEDA is proposed,which is to turn TEDA into a TEDA ionic liquids(TEDAILs).According to the structural characteristics and the iodine adsorption principle of TEDAILs,the iodine adsorption feasibility of TEDA ionic liquids is proved.The results show that TEDAILs is structurally modified compared with TEDA,and the temperature resistance is optimized by quaternary amination.However,it will not affect the chemical reaction path with CH_(3)I,and it is preliminarily judged that TEDAILs can be used as alternative materials for TEDA iodine removal impregnating agent for more in-depth research.