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Effect of Surface Modification of the Porous Stainless Steel Support on Hydrogen Perm-selectivity of the Pd-Ag Alloy Hydrogen Separation Membranes

다공성 스테인리스 강 지지체의 표면개질에 따른 팔라듐-은 합금 수소 분리막의 수소 투과 선택도의 변화

  • Kim, Nak-Cheon (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Kim, Se-Hong (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Lee, Jin-Beum (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Kim, Hyun-Hee (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Yang, Ji-Hye (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Kim, Dong-Won (Department of Advanced Materials Engineering, Kyonggi University)
  • 김낙천 (경기대학교 신소재공학과) ;
  • 김세홍 (경기대학교 신소재공학과) ;
  • 이진범 (경기대학교 신소재공학과) ;
  • 김현희 (경기대학교 신소재공학과) ;
  • 양지혜 (경기대학교 신소재공학과) ;
  • 김동원 (경기대학교 신소재공학과)
  • Received : 2016.06.07
  • Accepted : 2016.06.28
  • Published : 2016.06.30

Abstract

Pd-Ag alloy membranes have attracted a great deal of attention for their use in hydrogen purification and separation due to their high theoretical permeability, infinite selectivity and chemical compatibility with hydro-carbon containing gas streams. For commercial application, Pd-based membranes for hydrogen purification and separation need not only a high perm-selectivity but also a stable long-term durability. However, it has been difficult to fabricate thin, dense Pd-Ag alloy membranes on a porous stainless steel metal support with surface pores free and a stable diffusion barrier for preventing metallic diffusion from the porous stainless steel support. In this study, thin Pd-Ag alloy membranes were prepared by advanced Pd/Ag/Pd/Ag/Pd multi-layer sputter deposition on the modified porous stainless steel support using rough polishing/$ZrO_2$ powder filling and micro-polishing surface treatment, and following Ag up-filling heat treatment. Because the modified Pd-Ag alloy membranes using rough polishing/$ZrO_2$ powder filling method demonstrate high hydrogen permeability as well as diffusion barrier efficiency, it leads to the performance improvement in hydrogen perm-selectivity. Our membranes, therefore, are expected to be applicable to industrial fields for hydrogen purification and separation owing to enhanced functionality, durability and metal support/Pd alloy film integration.

Keywords

References

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