Effect of the Acid–Base Properties of the Support on the Catalytic Activity of Ethylene Polymerization Using Supported Catalysts Composed of Cp2ZrX2 (X = Cl, Me) and Al2O3(F) Full article
| Journal |
Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190 , E-ISSN: 1878-5204 |
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| Output data | Year: 2017, Volume: 122, Number: 1, Pages: 275-287 Pages count : 13 DOI: 10.1007/s11144-017-1215-x | ||||||
| Tags | Acid–base properties, Alumina, Fluorinated alumina, IR spectroscopy, Supported metallocene catalysts | ||||||
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0009 |
Abstract:
Supported catalysts Al2O3/Cp2ZrX2 and Al2O3(F)/Cp2ZrX2 (X = Me, Cl) for the ethylene polymerization were synthesized by anchoring zirconocene on alumina and alumina, modified with 1–7 wt% fluorine (Al2O3(F)). The study revealed that Al2O3(F)/Cp2ZrMe2 catalysts are active in ethylene polymerization in the absence of organoaluminum cocatalyst, whereas Al2O3(F)/Cp2ZrCl2 catalysts are active in the presence of triisobutylaluminum as a co-catalyst. The metallocene complex was strongly anchored on the support. Active component leaching was not observed during polymerization. The acid–base properties of Al2O3(F) were studied by IR spectroscopy of adsorbed probe molecules: CO, pyridine and CDCl3. A maximum activity of the catalysts was observed in the case of the Al2O3(5%F) support, containing Lewis acid sites with absorption bands (vCO) at 2210–2215 cm-1, Brønsted acid sites with a proton affinity (PA) of 1190 kJ/mol, and weak basic sites with PA 850 and 795 kJ/mol. ‘‘Cationic-like’’ complexes formed on the Lewis acid sites with absorption bands at 2180-2200 cm-1 are inactive at ethylene polymerization.
Cite:
Panchenko V.N.
, Danilova I.G.
, Zakharov V.A.
, Semikolenova N.V.
, Paukshtis E.A.
Effect of the Acid–Base Properties of the Support on the Catalytic Activity of Ethylene Polymerization Using Supported Catalysts Composed of Cp2ZrX2 (X = Cl, Me) and Al2O3(F)
Reaction Kinetics, Mechanisms and Catalysis. 2017. V.122. N1. P.275-287. DOI: 10.1007/s11144-017-1215-x WOS Scopus РИНЦ AN OpenAlex
Effect of the Acid–Base Properties of the Support on the Catalytic Activity of Ethylene Polymerization Using Supported Catalysts Composed of Cp2ZrX2 (X = Cl, Me) and Al2O3(F)
Reaction Kinetics, Mechanisms and Catalysis. 2017. V.122. N1. P.275-287. DOI: 10.1007/s11144-017-1215-x WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Apr 19, 2017 |
| Accepted: | Jun 9, 2017 |
| Published online: | Jun 14, 2017 |
| Published print: | Oct 1, 2017 |
Identifiers:
| Web of science: | WOS:000408706800019 |
| Scopus: | 2-s2.0-85020726685 |
| Elibrary: | 31020907 |
| Chemical Abstracts: | 2017:1002058 |
| OpenAlex: | W2725142682 |