Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Water Gas Shift Reaction in Palladium/Ceramic Membrane Reactor

팔라듐/세라믹 막반응기를 이용한 수성가스전환반응

  • Choi, Tae-Ho (Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology) ;
  • So, Won-Wook (Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Kwang-Je (Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology) ;
  • Moon, Sang-Jin (Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology) ;
  • Hyung, Gi-Woo (School of Chemical Engineering, Chonnam National University) ;
  • Chough, Sung Hyo (School of Chemical Engineering, Chonnam National University)
  • Received : 2004.12.10
  • Accepted : 2005.02.02
  • Published : 2005.04.10
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Abstract

Palladium membranes, which are permselective to hydrogen separation, were used for the hydrogen purification and in membrane reactors for improving conversions by shifting the reaction equilibrium. Palladium/ceramic composite membranes were prepared by electroless plating technique and then etched in titanium chloride ($TiCl_4$) as a post treatment to enhance the membrane's durability. These membranes were used for membrane reactors in water gas shift (WGS) reaction. CO conversions for the membrane reactor were obtained according to experimental parameters and compared to the traditional reactor without a palladium/ceramic membrane. As a result, CO conversion using palladium membrane reactor at an appropriate condition was over 20~25% greater than that without the membrane reactor. The stability in the long-term test of up to 120 h for WGS reaction with the membrane reactor was good without the degredation of CO conversion.

팔라듐 분리막은 수소에 대한 선택적 투과성능이 우수하여 수소의 분리 정제와 막반응기에 많이 이용된다. 무전해 도금법에 의해 팔라듐을 다공성 세라믹막 표면위에 도금하고 내구성을 향상하기 위한 후처리로서 사염화 티탄($TiCl_4$)을 이용한 에칭으로 팔라듐-세라믹 복합막을 제조하였다. 제조된 팔라듐-세라믹 복합막을 막반응기로 이용하여 수성가스전환반응에 적용하였으며, 여러 가지 실험 변수에 따른 CO 전환율을 조사하였다. 막반응기를 사용하지 않은 전통적인 반응기와 비교한 결과, 적정조건에서 막반응기의 CO의 반응전환율이 20~25% 이상 향상되었다. 막반응기에서의 수성가스반응은 120 h의 운전 결과, CO의 반응전환율이 변함없이 안정적으로 유지되었다.

Keywords

Acknowledgement

Grant : 이산화탄소 저감 및 처리 기술개발

Supported by : 과학기술부

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