합성가스 생산을 위한 복합개질 반응에서 $Ni/MgO-Al_2O_3$ 촉매의 탄소 침적 저항성 향상에 관한 연구

Enhancement of coke resistance on Ni/MgO-$Al_2O_3$ catalyst in combined $H_2O$ and $CO_2$ reforming of $CH_4$ for the syngas production

  • 구기영 (한국에너지기술연구원, 수소에너지연구단) ;
  • 노현석 (연세대학교, 환경공학부) ;
  • 정운호 (한국에너지기술연구원, 수소에너지연구단) ;
  • 윤왕래 (한국에너지기술연구원, 수소에너지연구단)
  • 발행 : 2009.06.25

초록

Highly active and stable nano-sized Ni catalysts supported on MgO-$Al_2O_3$ calcined from hydrotalcite-like materials have been successfully developed with a strong metal to support interaction (SMSI) to enhance the coke resistance in combined $H_2O$ and $CO_2$ reforming of $CH_4$ (CSCRM) for syngas ($H_2$/CO=2) production. The change of the surface area and NiO crystallite size with varying the pre-calcination temperature of support and Mgo content was investigated in relation to the coke resistance. As increasing the pre-calcination temperature, the surface area decreases and the metal to support interaction becomes weak. As a consequence, the coke deposition was more severe on catalysts pre-calcined at high temperature. It was concluded that highly dispersed Ni metal in the surface of Ni/MgO-$Al_2O_3$ catalyst (MgO=30 wt%) pre-calcined at $800^{\circ}C$ had a strong metal to support interaction (SMSI) resulting in an increase of coke resistance and high activity.

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