TiCl3/PdCl2法活化多孔陶瓷基体制备透氢Pd膜

Fabrication of hydrogen-permeable palladium membranes on porous ceramic substrate activated by TiCl_3/PdCl_2 method

以TiCl3取代SnCl2作为敏化剂,考察TiCl3/PdCl2活化法对Pd膜制备及性能的影响。所制备Pd膜的表面与断面形貌采用SEM与金相显微镜表征,测试膜的透氢性、选择性以及高温稳定性,比较了TiCl3/PdCl2与SnCl2/PdCl22种活化方法对Pd沉积速率的影响。结果表明:TiCl3/PdCl2活化法同样能够在多孔陶瓷基体表面形成活性催化层,并最终成功获得高性能的Pd膜。相对而言,TiCl3/PdCl2活化法更有利于Pd膜的快速形成,而且彻底避免了Sn对Pd膜的污染,有望成为SnCl2/PdCl2活化法的一种理想替代方法。

SnCl2 was replaced with TiCl3 as the sensitization agent,and the effects of the TiCl3/PdCl2 activation on the membrane fabrication and performance were investigated.The membrane surface and cross-section morphologies were characterized by SEM and metallographic microscope.The membrane permeability,selectivity and high-temperature stability were tested,and the influences of the TiCl3/PdCl2 and SnCl2/PdCl2 treatments on the palladium deposition were also studied.It could be concluded that the TiCl3/PdCl2 treatment successfully activated the porous ceramic surface as well and improved the membrane performances.Compared with the SnCl2/PdCl2 method,the TiCl3/PdCl2 treatment facilitated the membrane formation and the tin contamination to the membrane was avoided.The TiCl3/PdCl2 technique was an ideal alternative method to the SnCl2/PdCl2 method.