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THE STUDY OF DEFECTS MODIFICATION MATERIALS ON PALLADIUM MEMBRANE

Authors： XU Tianying, YU Jiafeng*, ZHANG Jixin, XU Hengyong*

Units： Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

KeyWords： palladium composite membrane; hydrogen permeation; NaA zeolite; alumina; defects

ClassificationCode：0643

year,volume(issue):pagination： 2015,35(2):30-35

Abstract：

were used to modify the defects of palladium membrane. The performances of unmodified ultra-thin palladium membrane and those modified by NaA zeolite and γ-Al2O3 were investigated. The results showed that, the nitrogen permeations decreased 57 and 2 times after modified by NaA zeolite and γ-Al2O3, respectively. After second electroless plating and activation, the nitrogen permeations of palladium membrane with the same thickness modified by NaA zeolite was 1/2500 of the unmodified membrane. The nitrogen permeations of these three palladium membranes were 1.9108×10-2 , 6.115×10-3 and 4.892×10-3m3/h·m2·bar. The H2/N2 selectivity of palladium membranes followed the order of NaA zeolite-modified > γ-Al2O3-modified > unmodified. It was indicated that the performance of palladium membrane can be improved by modification. And the performances of palladium membrane modified by NaA zeolite were better than γ-Al2O3. In the stability tests of NaA zeolite modified palladium membrane, the purity of hydrogen remained stable during 20 cycles of temperature and pressure changes in the range of 300-400°C and 0.1-1.0 MPa.

Funds：

国家自然科学基金，分子筛限域原位生长法制备超薄金属钯复合膜的研究，项目批准号：21306183.

AuthorIntro：

徐天莹（1988-），女，黑龙江省哈尔滨人，硕士，从事钯膜制备及钯膜性能评价研究.

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