Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Advancing the Frontier in Alkaline Promoter Performance Evaluation: Exploring Simplified Adoption Methods

알칼리 촉진제 성능 측정의 새로운 전환점: 도입 방식의 단순화를 통한 탐구

  • Wonjoong Yoon (Department of Chemical Engineering, SKKU) ;
  • Jiyeon Lee (Department of Chemical Engineering, SKKU) ;
  • Jaehoon Kim (Department of Chemical Engineering, SKKU)
  • 윤원중 (성균관대학교 화학공학과) ;
  • 이지연 (성균관대학교 화학공학과) ;
  • 김재훈 (성균관대학교 화학공학과)
  • Received : 2024.02.27
  • Accepted : 2024.03.04
  • Published : 2024.03.31
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Abstract

In this study, an alkali metal Na was introduced into iron-based catalysts used in the carbon dioxide-based Fischer-Tropsch process by wet impregnation and physical mixing methods to compare their performance. The as-prepared catalysts were evaluated for reactivity at 3.5 MPa, 330 ℃, feed ratio of H2/CO2 = 3 with a space velocity of 4,000 mL h-1 gcat-1. Comparing the two catalysts, it was found that Na was uniformly distributed throughout the catalyst when wet-impregnated, but Na for physically mixed catalyst was relatively located on the surface of the catalyst. In addition, the wet-impregnated catalyst showed higher liquid hydrocarbon (C5+) yield and lower CO selectivity. In conclusion, the effect of Na distribution in the catalyst on the reaction was identified and can be controlled by the introduction method.

본 연구에서는 이산화탄소를 기반으로한 피셔-트롭시 반응에 사용되는 철계 촉매에 알칼리 금속인 Na를 함침 및 물리적 혼합 방식으로 도입하여 각각의 성능을 비교하였다. 제조된 촉매는 3.5 MPa, 330 ℃, H2/CO2 = 3의 가스 조성비에서 공간속도 4,000 mL h-1 gcat-1 조건으로 반응성을 평가하였다. 두 가지 촉매를 비교한 결과 Na를 함침한 경우 Na가 촉매 전체에 균일하게 분산되어 있지만 물리적 방법으로 혼합한 촉매는 상대적으로 표면에 위치하였다. 또한 Na를 함침한 촉매가 더 높은 액체 탄화수소(C5+) 수율과 낮은 CO 선택도를 보였다. 결론적으로 촉매 내의 Na 분포가 반응에 미치는 영향을 파악하였으며 도입 방식을 통해 이를 조절할 수 있음을 확인하였다.

Keywords

References

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