청정기술 (Clean Technology)

  • 제23권2호
  • /
  • Pages.213-220
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  • 2017
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  • 1598-9712(pISSN)
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  • 2288-0690(eISSN)
한국청정기술학회 (The Korean Society of Clean Technology)
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조촉매가 담지된 Ni/HY 촉매상에서 메탄의 건식 개질 반응 연구

Dry Reforming of Methane over Promoters Added Ni/HY Catalysts

  • 정헌도 (한국에너지기술연구원 청정연료연구실)
  • Jeong, Heondo (Clean Fuel Laboratory, Korea Institute of Energy Research)
  • 투고 : 2017.04.24
  • 심사 : 2017.05.16
  • 발행 : 2017.06.30
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초록

HY 제올라이트에 담지된 Ni 촉매 및 Mg, Ca, K 그리고 Mn 등이 조촉매로 함께 담지된 Ni/HY 촉매상에서 메탄의 건식 개질 반응을 수행하였다. 촉매는 초기 함침법으로 제조하였으며 제조된 촉매는 XRD, BET, SEM 및 TGA 분석을 통하여 반응 전후 의 촉매 변화를 고찰하였다. Ni의 담지량이 증가함에 따라 메탄의 전환율 및 생성물의 수율이 증가하였으며 Ni의 담지량이 13 wt% 일 때 메탄의 전환율이 최대를 나타내었다. Mg를 조촉매로 함께 담지하였을 때 촉매의 탄소에 대한 저항성이 크게 증가하였으며 이에 따라 촉매의 장기 안정성이 크게 향상되었다. 이는 조촉매로 담지된 Mg가 Ni의 입자 크기를 작게 하여 Ni의 분산도를 향상시키고 촉매의 비활성화를 방지하기 때문인 것으로 나타났다.

Dry reforming of methane to synthesis gas was investigated over a series of Ni/HY catalysts promoted by Mg, Ca, K and Mn. These catalysts were characterized by XRD, BET, SEM, and TGA analyses before and after the reaction. Conversions and product yields were increased with increasing nickel loading up to 13 wt%. Among the catalysts tested in this work, the Ni-Mg/HY catalyst showed the highest carbon resistance and the most stable catalytic performance. It was revealed that the addition of Mg promoter reduced the nickel particle size and produced the highly dispersed nickel particles, and consequently, retarded the catalyst deactivation.

키워드

참고문헌

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