Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Al Precursor Addition Time on Catalytic Characteristic of Cu/ZnO/Al2O3 Catalyst for Water Gas Shift Reaction

Water Gas Shift 반응을 위한 Cu/ZnO/Al2O3 촉매에서 Al 전구체 투입시간에 따른 촉매 특성 연구

  • BAEK, JEONG HUN (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • JEONG, JEONG MIN (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • PARK, JI HYE (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • YI, KWANG BOK (Department of Chemical Engineering Education, Chungnam National University) ;
  • RHEE, YOUNG WOO (Graduate School of Energy Science and Technology, Chungnam National University)
  • 백정훈 (충남대학교 에너지과학기술대학원) ;
  • 정정민 (충남대학교 에너지과학기술대학원) ;
  • 박지혜 (충남대학교 에너지과학기술대학원) ;
  • 이광복 (충남대학교 화학공학교육과) ;
  • 이영우 (충남대학교 에너지과학기술대학원)
  • Received : 2015.08.18
  • Accepted : 2015.10.30
  • Published : 2015.10.30
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Abstract

$Cu/ZnO/Al_2O_3$ catalysts for water gas shift (WGS) reaction were synthesized by co-precipitation method with the fixed molar ratio of Cu/Zn/Al precursors as 45/45/10. Copper and zinc precursor were added into sodium carbonate solution for precipitation and aged for 24h. During the aging period, aluminum precursor was added into the aging solution with different time gap from the precipitation starting point: 6h, 12h, and 18h. The resulting catalysts were characterized with SEM, XRD, BET surface measurement, $N_2O$ chemisorption, TPR, and $NH_3$-TPD analysis. The catalytic activity tests were carried out at a GHSV of $27,986h^{-1}$ and a temperature range of 200 to $400^{\circ}C$. The catalyst morphology and crystalline structures were not affected by aluminum precursor addition time. The Cu dispersion degree, surface area, and pore diameter depended on the aging time of Cu-Zn precipitate without the presence of $Al_2O_3$ precursor. Also, the interaction between the active substance and $Al_2O_3$ became more stronger as aging duration, with Al precursor presented in the solution, increased. Therefore, it was confirmed that aluminum precursor addition time affected the catalytic characteristics and their catalytic activities.

Keywords

References

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