Bulletin of the Korean Chemical Society

  • 제27권6호
  • /
  • Pages.821-829
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  • 2006
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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NiO/La2O3-ZrO2/WO3 Catalyst Prepared by Doping ZrO2 with La2O3 and Modifying with WO3 for Acid Catalysis

  • Sohn, Jong-Rack (Department of Applied Chemistry, Engineering College, Kyungpook National University) ;
  • Choi, Hee-Dong (Department of Applied Chemistry, Engineering College, Kyungpook National University) ;
  • Shin, Dong-Chul (Department of Applied Chemistry, Engineering College, Kyungpook National University)
  • 발행 : 2006.06.20
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초록

A series of catalysts, $NiO/La_2O_3-ZrO_2/WO_3$, for acid catalysis was prepared by the precipitation and impregnation methods. For the $NiO/La_2O_3-ZrO_2/WO_3$ samples, no diffraction lines of nickel oxide were observed, indicating good dispersion of nickel oxide on the catalyst surface. The catalyst was amorphous to X-ray diffraction up to 300 ${^{\circ}C}$ of calcination temperature, but the tetragonal phase of $ZrO_2$ and monoclinic phase of $WO_3$ by the calcination temperatures from 400 ${^{\circ}C}$ to 700 ${^{\circ}C}$ were observed. The role of $La_2O_3$ in the catalyst was to form a thermally stable solid solution with zirconia and consequently to give high surface area and acidity. The high acid strength and high acidity were responsible for the W=O bond nature of complex formed by the modification of $ZrO_2$ with $WO_3$. For 2-propanol dehydration the catalyst calcined at 400 ${^{\circ}C}$ exhibited the highest catalytic activity, while for cumene dealkylation the catalyst calcined at 600 ${^{\circ}C}$ showed the highest catalytic activity. 25-$NiO/5-La_2O_3-ZrO_2/15-WO_3$ exhibited maximum catalytic activities for two reactions due to the effects of $WO_3$ modifying and $La_2O_3$ doping.

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피인용 문헌

  1. The Effects of Al2O3 Addition and WO3 Modification on Catalytic Activities of NiO/TiO2 for Acid Catalysis vol.120, pp.1-2, 2008, https://doi.org/10.1007/s10562-007-9262-y
  2. CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization vol.27, pp.12, 2006, https://doi.org/10.5012/bkcs.2006.27.12.1989
  3. Effect of Al2O3 Addition and WO3 Modification on Catalytic Activity of NiO/Al2O3-TiO2/WO3 for Ethylene Dimerization vol.28, pp.10, 2006, https://doi.org/10.5012/bkcs.2007.28.10.1763
  4. Physicochemical and Catalytic Properties of NiSO4/CeO2-ZrO2 Catalyst Promoted with CeO2 for Acid Catalysis vol.28, pp.8, 2006, https://doi.org/10.5012/bkcs.2007.28.8.1265