Partial Oxidation of Methane in Palladium-silver Alloy Membrane Reactor

팔라듐-은 막반응기를 이용한 메탄의 부분산화반응

  • Choi, Tae-Ho (Division of Advanced Chemical Technology, Korea Research Institute of Chemical Technology) ;
  • Kim, Kwang-Je (Division of Advanced Chemical Technology, Korea Research Institute of Chemical Technology) ;
  • Moon, Sang-Jin (Division of Advanced Chemical Technology, Korea Research Institute of Chemical Technology) ;
  • Suh, Jung-Chul (LNG Research Center, Korea Gas Coperation) ;
  • Baek, Young-Soon (LNG Research Center, Korea Gas Coperation)
  • Received : 2005.02.17
  • Accepted : 2005.07.26
  • Published : 2005.10.10

Abstract

The partial oxidation of methane is one of important processes for hydrogen production. As a membrane reactor, palladium-silver (Pd-Ag) alloy membrane prepared by electroless plating technique was employed for partial oxidation of methane. The experimental variables were reaction temperature, $O_2/CH_4$ mole ratio, $CH_4$ feed rate, and $N_2$ sweep gas flow rate. The methane conversions increased with the reaction temperatures in the range of 350 to $730^{\circ}C$. The highest methane conversion and CO selectivity were obtained at the condition of $O_2/CH_4$ mole ratio of 0.5 and $730^{\circ}C$ using commercially available nickel/alumina catalyst. The Pd-Ag membrane reactor showed higher methane conversions, 10~40% higher, compared to those in a traditional reactor.

메탄의 부분산화반응은 수소 제조의 중요한 반응 중의 하나이다. 무전해 도금방법에 의해 제조된 팔라듐-은 막을 막반응기(membrane reactor)로서 메탄의 부분산화반응에 적용하여 반응온도, $O_2/CH_4$ 몰비, $CH_4$ 공급속도, $N_2$ 운반 가스 흐름속도 등의 변화에 따라 실험을 수행하였다. 막반응기의 메탄 전환율은 알루미나에 담지된 니켈 촉매를 사용하는 반응조건하에서 $350{\sim}730^{\circ}C$의 반응온도에 따라 증가하는 경향을 보였으며, 특히 $730^{\circ}C$$O_2/CH_4$ 몰비 0.5에서 메탄 전환율과 CO 선택도가 가장 높았다. 막반응기의 메탄 전환율은 전통적인 관형반응기와 비교한 결과 반응조건에 따라 10~40% 정도 높았다.

Acknowledgement

Grant : 이산화탄소 저감 및 처리 기술개발

Supported by : 과학기술부

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