Ethylene dimerization on Pd(2,2 ' bipyridine)Cl-2 encapsulated in Na(H)Y zeolites

This paper presents the results concerning Pd(2,2'-bipyridine)Cl-2 complex encapsulated in Na(H)Y zeolite and its application in ethylene dimerization . The catalysts were characterised by diffuse-reflectance UV-VIS spectrosco py, IK spectroscopy and DTA/TG analysis. Their spectra presented the charac teristic maximums of complexes. Ethylene conversion and its selectivity to 1 -and 2-C4H8 (cis and trans) as a function of reaction temperature are ana lysed. Correlations between the nature of encapsulated complex species and the catalytic activity and the selectivity to ethylene dimerization are est ablished. The best results on Pd complex catalysts were obtained at 80 degr ees C.