两种TCAP分离材料分离H-D的比较

Comparation of Two Separation Materials Used in Thermal Cycling Absorption Process

对TCAP的两种常用分离材料Pd/K和Pd/Al2O3进行研究对比。分别对Pd/K和Pd/Al2O3的钯含量、表面形貌、晶体结构、饱和吸氢量进行了测试比较,并采用901.7g w(Pd)=(40.8±0.1)%的Pd/K和1 558gw(Pd)=(45.3±0.1)%的Pd/Al2O3分别填装TCAP分离柱,对Pd/K和Pd/Al2O3在分离H-D方面进行了研究对比。结果表明,在分离H-D方面,Pd/Al2O3明显优于Pd/K。

The two separation materials Pd/K and Pd/Al2O3 used in thermal cycling absorption process for hydrogen isotopes separation were investigated and compared. The contents of palladium in Pd/K and Pd/Al2O3 measured by means of X-ray fluorescence analyzer are （40.8±0. 1）% and （45.3±0.1）%, respectively. The morphological characters and X-ray diffraction patterns of these two materials were respectively recorded with SEM and XRD, compared and discussed. The saturated absorption capacities of hydrogen stored by Pd/K and Pd/Al2O3 are 73.12 mL/g（STP） and 70. 98 mL/g（STP）, respectively. The separation experiments of H-D were studied via TCAP using 901.7 g Pd/K and 1 558 g Pd/ Al2O3, respectively. The results show that the Pd/Al2O3 is better than Pd/K in separating hydrogen isotopes.