Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Hydrodesulfuriztion of Thiophene over Neodymium Added Nickel Catalysts

네오디뮴이 첨가된 니켈 촉매의 티오펜 탈황 반응

  • Moon, Young-Hwan (Samsung Global Environment Research Center) ;
  • Ihm, Son-Ki (Dept. Chem. Eng., Korea Advanced Institute of Science and Technology)
  • 문영환 (삼성지구환경연구소) ;
  • 임선기 (한국과학기술원 화학공학과)
  • Received : 1996.05.13
  • Accepted : 1996.09.04
  • Published : 1996.10.10

Abstract

In this study HDS(hydrodesulfurization) of thiophene was researched over nickel catalysts added with small amounts of neodymium which were prepared by different methods such as unsupported coprepricipitated NdNi catalysts, unsupported intermetallic $NdNi_5$ catalysts, and carbon supported NdNi catalyst. The HDS activity was remarkably increased when a small amounts of neodymium was added to unsupported coprecipitated Ni catalysts. Thus it was known that the role of Nd is important in HDS of thiophene of Ni catalysts. For the case of unsupported intermetallic $NdNi_5$, the intermetallic crystallinity was destroyed to oxide and sulfide after calcination and presulfidation respectively. The HDS activity of thiophene can be explained by surface area of unsupported catalysts. And Nd acts like as structural promoter keeping the high surface area of unsupported catalysts. The HDS activity was increased by each ten times based on 1 gr. of nickel in the order of unsupported intermetallic $NdNi_5$, unsupported coprecipitated NdNi, and carbon supported NdNi catalysts according to different preparation method of catalysts.

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