CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization 


Vol. 27,  No. 12, pp. 1989-1996, Dec.  2006
10.5012/bkcs.2006.27.12.1989


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  Abstract

The NiS4/Ce2-Zr2 catalysts containing different nickel sulfate and Ce2 contents were prepared by the impregnation method, where support, Ce2-Zr2 was prepared by the coprecipitation method using a mixed aqueous solution of zirconium oxychloride and cerium nitrate solution followed by adding an aqueous ammonia solution. No diffraction line of nickel sulfate was observed up to 20 wt %, indicating good dispersion of nickel sulfate on the surface of Ce2-Zr2. The addition of nickel sulfate (or Ce2) to Zr2 shifted the phase transition of Zr2 from amorphous to tetragonal to higher temperatures because of the interaction between nickel sulfate (or Ce2) and Zr2. A catalyst (10-NiS4/1-Ce2-Zr2) containing 10 wt % NiS4 and 1 mole % Ce2, and calcined at 600 °C exhibited a maximum catalytic activity for ethylene dimerization. The catalytic activities were correlated with the acidity of catalysts measured by the ammonia chemisorption method. The role of Ce2 was to form a thermally stable solid solution with zirconia and consequently to give high surface area, thermal stability and acidity of the sample.

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  Cite this article

[IEEE Style]

Y. I. Pae, D. C. Shin, J. R. Sohn, "CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization," Bulletin of the Korean Chemical Society, vol. 27, no. 12, pp. 1989-1996, 2006. DOI: 10.5012/bkcs.2006.27.12.1989.

[ACM Style]

Young Il Pae, Dong Cheol Shin, and Jong Rack Sohn. 2006. CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization. Bulletin of the Korean Chemical Society, 27, 12, (2006), 1989-1996. DOI: 10.5012/bkcs.2006.27.12.1989.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949