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The Membrane Society of Korea (한국막학회)
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Preparation of Pd/Al2O3, Pd/Ag/Al2O3 Membranes and Evaluation of Hydrogen Permeation Performance

Pd/Al2O3, Pd/Ag/Al2O3 분리막의 제조와 수소 투과 성능 평가

  • Lee, Jeong In (Department of Chemical and Biochemical Engineering, Dongguk University) ;
  • Shin, Min Chang (Department of Chemical and Biochemical Engineering, Dongguk University) ;
  • Zhuang, Xuelong (Department of Chemical and Biochemical Engineering, Dongguk University) ;
  • Hwang, Jae Yeon (Department of Chemical and Biochemical Engineering, Dongguk University) ;
  • Kim, Eok yong (Department of Renewable Energy Engineering, Dongguk University) ;
  • Jeong, Chang-Hun (Hygenenergy Co., Ltd.) ;
  • Park, Jung Hoon (Department of Chemical and Biochemical Engineering, Dongguk University)
  • 이정인 (동국대학교 화공생물공학과) ;
  • 신민창 (동국대학교 화공생물공학과) ;
  • 장학룡 (동국대학교 화공생물공학과) ;
  • 황재연 (동국대학교 화공생물공학과) ;
  • 김억용 (동국대학교 신재생에너지공학) ;
  • 정창훈 ((주)하이젠에너지) ;
  • 박정훈 (동국대학교 화공생물공학과)
  • Received : 2022.04.07
  • Accepted : 2022.04.19
  • Published : 2022.04.30
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Abstract

In this experiment, an α-Al2O3 ceramic hollow fiber was used as a support, and a hydrogen membrane plated with Pd and Pd-Ag was manufactured through electroless plating. The Pd-Ag membrane was annealed at 500℃ for 10 h to form an alloy of Pd and Ag. It was confirmed that it became a Pd-Ag alloy through EDS (Energy Dispersive X-ray Spectroscopy) analysis. Also, the thickness of the Pd, Pd-Ag plating layer was measured to be about 8.98 and 9.29 ㎛ through SEM (Scanning Electron Microscope) analysis respectively. Hydrogen permeation experiment was performed using the H2 gas and mixed gas (H2 and N2) in the range of 350~450℃ and 1-4 bar using the prepared hydrogen membrane. Under the H2 gas condition, the Pd and Pd-Ag membrane has a flux of up to 21.85 and 13.76 mL/cm2·min and also separation factors of 1216 and 361 were obtained in the mixed gas at 450℃ and 4 bar conditions respectively.

본 실험에서는 α-Al2O3 세라믹 중공사를 지지체로 사용하였고, 무전해 도금을 통해 Pd 및 Pd-Ag가 도금된 수소 분리막을 제조하였다. Pd-Ag 분리막은 Pd와 Ag 합금 형태로 만들기 위하여 500℃, 10 h 동안의 annealing 과정을 거쳤으며, EDS (Energy Dispersive X-ray Spectroscopy) 분석을 통해 Pd-Ag 합금이 되었다는 것을 확인하였다. 또한, SEM (Scanning Electron Microscope) 분석을 통해 제조된 Pd 및 Pd-Ag 도금층의 두께는 약 8.98, 9.29 ㎛으로 측정되었다. 제조된 수소 분리막은 350~450℃, 1-4 bar의 범위에서 수소 단일 가스, 혼합가스(H2, N2)를 이용하여 수소 투과 실험을 진행하였다. 수소 단일 가스에서 Pd와 Pd-Ag 분리막은 최대 각각 21.85, 13.76 mL/cm2·min의 flux를 가지며, 혼합가스에서는 450℃, 4 bar의 조건일 때, 1216, 361의 separation factor가 각각 나오는 것을 확인하였다.

Keywords

Acknowledgement

본 결과물은 환경부의 재원으로 한국환경산업기술원의 대기환경 관리기술 사업화 연계 기술개발사업의 지원을 받아 연구되었습니다.(과제번호: RE202103386, 과제명: 블루 수소충전소용 수소 정제분리 시스템 실증 기술개발-Technology development of hydrogen purification membrane separation demonstration for blue hydrogen station)

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