Effect of Cation on HTO/H2O Separation and Dehydration Characteristics of Y-Type Zeolite Adsorbent
Effect of Cation on HTO/H2O Separation and Dehydration Characteristics of Y-Type Zeolite Adsorbent
复制标题
阳离子对Y型沸石吸附剂HTO/H2O分离及脱水特性的影响
DOI：
10.13182/fst54-462
复制
发表时间：
2008
影响因子：
0.9
通讯作者：
T. Yamanishi
中科院分区：
文献类型：
--
作者：
Y. Iwai;M. Uzawa;T. Yamanishi
本文研究了几种类型的吸附器，它们被认为是处理未来聚变工厂中产生的超过100 kg/h的高水平氚化水的水净化系统的第一阶段。沸石是合适的吸附剂，因为它是具有大水容量的无机材料。快速脱水特性以及大的HTO/H2O分离因子对于吸附器使其尺寸最小化是必要的。本文主要研究了阳离子对Y型分子筛HTO /H_2O分离和脱水性能的影响。选择的阳离子是Na、K和Ca。在本实验中，沸石的火焰加工SiO2/Al 2 O3比固定为5.0。静态条件下同位素分离因子约为1.1-1.2。至于脱水，操作温度固定了沸石可移动水的容量。室温下的容量为NaY > CaY > KY。HTO脱水特性取决于累积的吹扫气体量，而吹扫气体速率的影响较小。温度对HTO脱水的影响也较小，尤其是在脱水初期。变压是HTO脱水的有效方法。
Abstract Several types of adsorbers have been studied as they are considered for the first stage of water detritiation systems processing more than 100kg/h of high-level tritiated water generated in a future fusion plant. Zeolite is a suitable adsorbent since it is an inorganic material having a large water capacity. Rapid dehydration characteristics as well as a large HTO/H2O separation factor is necessary for the adsorber to minimize its size. Present experiments were focused on the effect of cations on HTO / H2O separation and dehydration characteristics of Y-type zeolites. The selected cations are Na, K and Ca. The flamework SiO2/Al2O3 ratio of the zeolites is fixed to 5.0 in the present experiments. It was found that the isotope separation factors are around 1.1-1.2 under static conditions. As for dehydration, operating temperature fixes the capacity of movable water from the zeolites. The capacity at room temperature is NaY > CaY > KY. HTO dehydration characteristics depend on the accumulated purge gas amount, while the purge gas rate is less influential. Effect of temperature on HTO dehydration is also less influential especially in the early stage of dehydration. Pressure swing is an effective method for HTO dehydration.