CAJ | 학술논문

以大孔α-Al_2O_3陶瓷管(平均孔径为3μm)为载体,采用水热合成法在其表面形成一层纯硅沸石(Silicalite-1)修饰层,利用化学镀法在经过纯硅沸石修饰后的载体表面成功制备出致密钯复合膜,钯膜厚度约为5 μm.利用SEM对复合膜的结构和形貌进行了分析,并在350～500℃范围内对基于纯硅沸石修饰层的钯复合膜进行气体渗透测试表明,该沸石层修饰法制备的钯复合膜具有良好的氢渗透性.在500℃时,氧气渗透通量可达为0.12mol/(m~2·s),理想气体分离因子α(H_2/N_2)达到420.并对该钯膜与在载体表面直接制备的钯复合膜性能的差异进行了讨论.
이대공α-Al_2O_3도자관(평균공경위3μm)위재체,채용수열합성법재기표면형성일층순규비석(Silicalite-1)수식층,이용화학도법재경과순규비석수식후적재체표면성공제비출치밀파복합막,파막후도약위5 μm.이용SEM대복합막적결구화형모진행료분석,병재350～500℃범위내대기우순규비석수식층적파복합막진행기체삼투측시표명,해비석층수식법제비적파복합막구유량호적경삼투성.재500℃시,양기삼투통량가체위0.12mol/(m~2·s),이상기체분리인자α(H_2/N_2)체도420.병대해파막여재재체표면직접제비적파복합막성능적차이진행료토론.
Macroporous α-Al_2O_3 tubes as supports are modified with zeolite silicalite-1 layer by hydrothermal treatment.A dense palladium membrane with thickness of around 5 μm is successfully deposited on the modified support.Comparison between palladiuin membrane prepared directly on the support and that on the modified support is carried out.In addition,the structure and morphology of palladium composite membranes are characterized by SEM.It is indicated that a dense palladium membrane can be hardly obtained on a marcroporous support directly.The gas permeation performance is tested at the temperature range of 350-500℃.At 500℃，the highest hydrogen flux of 0.12 mol·m~(-2)·s~(-1) can be obtained，correspondingly the ideal separation factor α(H_2/N_2)is up to 420.