Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Effects of CO and $CO_2$ on Hydrogen Permeation through Pd-coated V-Ti-Ni Alloy Membranes

Pd 코팅된 V-Ti-Ni 합금 분리막을 통한 수소투과에서 CO와 $CO_2$의 영향

  • Jeon, Sung-Il (Green House Gas Center, Korea Institute of Energy Research) ;
  • Park, Jung-Hoon (Green House Gas Center, Korea Institute of Energy Research) ;
  • Lee, Yong-Taek (Department of Chemical Engineering, Chung Nam National University)
  • 전성일 (한국에너지기술연구원, 온실가스센터) ;
  • 박정훈 (한국에너지기술연구원, 온실가스센터) ;
  • 이용택 (충남대학교 화학공학과)
  • Received : 2011.09.16
  • Accepted : 2011.09.27
  • Published : 2011.09.30
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Abstract

The influence of co-existing gases on the hydrogen permeation was studied through a Pd-coated $V_{53}Ti_{26}Ni_{21}$ alloy membrane. The hydrogen permeation characteristics of Pd-coated $V_{53}Ti_{26}Ni_{21}$ alloy membrane have been investigated in the pressure range 1-3 bar under pure hydrogen and hydrogen mixture gas with carbon dioxide and carbon monoxide at $450^{\circ}C$. Preliminary hydrogen permeation experiments have been confirmed that hydrogen flux was $5.36mL/min/cm^2$ for a Pd-coated $V_{53}Ti_{26}Ni_{21}$ alloy membrane (thick: 0.5 mm) using pure hydrogen as the feed gas. In addition, hydrogen fluxes were 4.46, 5.20, $3.91mL /min/cm^2$ for$V_{53}Ti_{26}Ni_{21}$ alloy membrane using $H_2/CO_2$, $H_2/CO$ and $H_2/CO_2/CO$ as the feed gas respectively. Therefore, the hydrogen permeation flux decreased with decrease of hydrogen partial pressure irrespective of temperature and pressure when $H_2/CO_2$, $H_2/CO$ and $H_2/CO_2/CO$ mixture applied as feed gas respectively and permeation fluxes were satisfied with Sievert's law in different feed conditions. It was found from XRD results after permeation test that the Pd-coated $V_{53}Ti_{26}Ni_{21}$ alloy membrane had good stability and durability for various mixtures feeding condition.

팔라듐이 코팅된 $V_{53}Ti_{26}Ni_{21}$ 합금 분리막을 통해 수소 투과시 혼합가스의 영향에 대해 알아보았다. 순수 수소, 수소, 이산화탄소 및 일산화탄소의 혼합가스를 공급가스로 주입할 때, $450^{\circ}C$, 1-3 bar의 압력에서 팔라듐이 코팅된 $V_{53}Ti_{26}Ni_{21}$ 합금 분리막의 수소 투과 실험을 수행하였다. 수소만을 공급한 투과 실험에서 팔라듐 코팅된 $V_{53}Ti_{26}Ni_{21}$ 합금 분리막(두께: 0.5 mm)의 수소 투과량은 3 bar, $450^{\circ}C$ 조건에서 $5.36mL/min/cm^2$였다. 또한 수소/이산화탄소, 수소/일산화탄소 및 수소/이산화탄소/일산화탄소를 공급한 투과실험에서 $V_{53}Ti_{26}Ni_{21}$ 합금 분리막의 수소 투과량은 각각 4.46, 5.20, $3.91mL/min/cm^2$였다. 따라서, 수소/이산화탄소, 수소/일산화탄소 및 수소/이산화탄소/일산화탄소 혼합가스를 각각 공급할 때 투과량은 온도와 압력에 상관없이 수소 분압 감소만큼 감소하였고 모든 경우 Sievert 법칙을 잘 만족시켰다. 투과 후 분리막의 XRD 결과로부터 $V_{53}Ti_{26}Ni_{21}$ 합금 분리막은 여러 혼합가스에 대해 안정성과 내구성이 우수하다는 것을 알 수 있었다.

Keywords

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