6533b82cfe1ef96bd128f4d7
RESEARCH PRODUCT
Polymerization of ethylene by oxide-supported titanium halide catalyst: kinetic model with a deactivation of active species
Krystyna Czajasubject
EthylenePolymers and PlasticsCatalyst supportOrganic Chemistrytechnology industry and agriculturechemistry.chemical_elementPolymerization of ethyleneCatalysisTitanium chloridechemistry.chemical_compoundchemistryPolymerizationSpecific surface areaPolymer chemistryMaterials ChemistryTitanium Ziegler–Natta type catalystZiegler–Natta catalystOxide-type supportTitaniumdescription
Abstract The effect of the calcination temperature of alumina, which was then used as a support for a titanium halide catalyst [TiCl4/Et2AlCl], on the catalyst activity in ethylene polymerization was investigated. α-Al2O3 was found to make a more advantageous catalyst support as compared to γ-Al2O3 despite the fact that the former offered a clearly lower specific surface area and its content of surface OH groups was inferior. The ethylene polymerization in the presence of the catalytic system on different alumina supports was investigated on the basis of a proposed kinetic model, taking into consideration the deactivation of active sites in the process. The improved activity was found to result from the better utilisation of adsorbed titanium chloride in the formation of active sites (increase of [C 0 ∗ ] ) and from the higher stability of said sites (lower kt), while their chemical nature underwent no significant change (kp and ktr remain unchanged).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-05-01 | Polymer |