Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Hydrogen Permeation Performance of Ni48Nb32Zr20 Alloy Membrane Coated with Pd by Sputtering

스퍼터링으로 Pd가 코팅된 Ni48Nb32Zr20 합금분리막의 수소 투과 성능

  • Min Chang Shin (Department of Biochemical & Chemical Engineering, Dongguk University) ;
  • Jung Hoon Park (Department of Biochemical & Chemical Engineering, Dongguk University)
  • 신민창 (동국대학교 화공생물공학과) ;
  • 박정훈 (동국대학교 화공생물공학과)
  • Received : 2024.02.19
  • Accepted : 2024.03.27
  • Published : 2024.04.30
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Abstract

In modern times, when a change in the energy paradigm is required, hydrogen is an attractive energy source. Among these hydrogen purification technologies, technology using a membrane is attracted attention as a technology that can purify high purity hydrogen at low cost. However, palladium(Pd), which is mostly used because of its excellent hydrogen separation performance, is very expensive, so a replacement material is needed. In this study, a alloy membrane was manufactured from an alloy of niobium (Nb), which has high hydrogen permeability but is weak to hydrogen embrittlement, and nickel (Ni) and zirconium (Zr), which have low hydrogen permeability but are highly durable. Hydrogen permeation characteristics were confirmed under conditions of 350~450 ℃ at 1 to 4 bar. The maximum hydrogen permeation flux was 0.69 ml/cm2/min for the Ni48Nb32Zr20 alloy membrane without Pd coating, and 13.05 ml/cm2/min for the Pd coated alloy membrane.

에너지 패러다임의 변화가 요구되는 현대에 수소는 매력적인 에너지원이다. 이러한 수소를 정제하는 기술 중에서 분리막을 이용한 기술은 저비용으로 고순도의 수소를 정제할 수 있는 기술로 주목받고 있다. 그러나 수소 분리 성능이 뛰어난 팔라듐(Pd)은 가격이 매우 비싸 이를 대체한 소재가 필요하다. 본 연구에서는 수소 투과 성능은 좋으나 수소 취성에 약한 니오븀(Nb)과 수소 투과 성능은 떨어지나 내구성이 뛰어난 니켈(Ni)과 지르코늄(Zr)을 혼합한 합금으로 분리막을 제조하여 1~4 bar, 350~450 ℃ 조건에서 수소 투과 특성을 확인하였다. Pd를 코팅하지 않은 Ni48Nb32Zr20 분리막의 경우 최대 0.69 ml/cm2/min의 투과량을 보였으며, Pd가 코팅된 경우에는 최대 13.05 ml/cm2/min의 투과량을 보였다.

Keywords

Acknowledgement

본 연구는 한국전력공사의 2021년 선정 기초연구개발 과제 연구비에 의해 지원되었음 (과제번호: R21XA01-30)

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