Characterization of Dealuminated NiY Zeolite and Catalytic Activity for Ethylene Dimerization

Jong Rack Sohn; Joon Ho Park

Journal of Industrial and Engineering Chemistry, Vol.4, No.4, 308-313, December, 1998

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Characterization of Dealuminated NiY Zeolite and Catalytic Activity for Ethylene Dimerization

Jong Rack Sohn^†, and Joon Ho Park

Department of Industrial Chemistry, Engineering College, Kyungpook National University, Taegu 702-701, Korea

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A series of dealuminated NiDY zeolites were prepared by the reaction of NH₄NaY with SiC1₄ at elevated temperatures followed by exchanging with NiC1₂ solution. The acid strength and thermal stability of dealuminated zeolite samples increased with the degree of dealumination. Upon dealumination up to Si/Al ratios of 6.0, the increases of catalytic activities for ethylene dimerization were correlated to the OH stretching band shifts in infrared spectra and to the increase of acid strength for the dealuminated NiDY samples. It is suggested that Ni⁺ ions take part in the formation of the catalytically active sites.

Keywords:Dealumination;NiY Zeolite;Ethylene Dimerization;Thermal Stability

[References]

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[1] Blackmond DG, Oukaci R, Blanc B, Gallezot P, J. Catal., 131, 401 (1991)

[2] Zholobenko V, Garforth A, Bachelin F, Dwyer J, Stud. Surf. Sci. Catal., 105, 197 (1997)

[3] Choung SJ, Butt JB, Appl. Catal., 64, 173 (1990)

[4] Yoo JS, Donohue JA, Kleefisch MS, Lin PS, Elfline SD, Appl. Catal. A: Gen., 105, 83 (1993)

[5] Sohn JR, Lee SY, Appl. Catal. A: Gen., 164(1-2), 127 (1997)

[6] Wendt G, Fritsch E, Schollner R, Siegel HZ, Anorg. Allg. Chem., 467, 51 (1980)

[7] Elev IV, Shelimov BN, Kazansky VB, J. Catal., 89, 470 (1984)

[8] Yashima T, Ushida Y, Ebisawa M, Hara N, J. Catal., 36, 320 (1975)

[9] Riekert L, J. Catal., 19, 8 (1970)

[10] Ghosh AK, Kevan L, J. Phys. Chem., 92, 4439 (1988)

[11] Beaumont R, Barthomeuf D, J. Catal., 30, 288 (1973)

[12] Sohn JR, Pae YI, Jang HJ, Park MY, J. Catal., 127, 449 (1991)

[13] Beyer HK, Belenykaya I, In Catalysis by Zeolites, B. Imelik, at al., Eds.; Elsevier: Amsterdam, 1980; p. 203-210 (1980)

[14] Sohn JR, Decanio SJ, Lunsford JH, O'Donnell DJ, Zeolites, 6, 225 (1986)

[15] Ward JW, J. Catal., 9, 225 (1967)

[16] Jacobs PA, Carboniogenic Activity of Zeolites Elsevier, Amsterdam, p. 58 (1977)

[17] Ward JW, J. Catal., 18, 348 (1970)

[18] Uytterhoeven JB, Christner LG, Hall WK, J. Phys. Chem., 69, 2117 (1965)

[19] Sohn JR, Ozaki A, J. Catal., 59, 303 (1979)

[20] Sohn JR, Park MY, Appl. Catal. A: Gen., 101, 129 (1993)

[21] Kermarec M, Olivier D, Richard M, Che M, J. Phys. Chem., 86, 2818 (1982)

[22] Elev IV, Shelimov BN, Kazansky VB, Kinet. Katal., 23, 936 (1982)

[23] Elev IV, Shelimov BN, Kazansky VB, J. Catal., 89, 470 (1984)