Role of Titanium in Ti/SiO2‐Supported Metallocene‐based Olefin Polymerization Catalysts. Part 2: Particle Fragmentation.
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| Title: | Role of Titanium in Ti/SiO |
|---|---|
| Authors: | Zanoni, Silvia1 (AUTHOR), Nikolopoulos, Nikolaos1 (AUTHOR), Welle, Alexandre2 (AUTHOR), Cirriez, Virginie2 (AUTHOR), Weckhuysen, Bert M.1 (AUTHOR) b.m.weckhuysen@uu.nl |
| Source: | ChemCatChem. 5/19/2023, Vol. 15 Issue 10, p1-12. 12p. |
| Subjects: | Metallocene catalysts, Polymers, Alkenes, Catalyst supports, Polymerization, Catalysts, Catalytic activity, Scanning electron microscopes |
| Abstract: | A commercial SiO2 modified by the addition of a TiO2 layer on its surface and pore walls offers a support for metallocene‐based ethylene polymerization catalysts with a 35 % improved catalytic activity. The effect of such support modification on the catalyst particle fragmentation during polymerization reactions were assessed. This was performed by exposing the internal cross‐section of several SiO2 and Ti/SiO2‐based metallocene catalyst particles, polymerized at a wide range of reaction conditions, with a Focused‐Ion Beam Scanning Electron Microscope (FIB‐SEM), followed by a semi‐quantitative analysis of polymer, catalyst and macropores of each 2D image obtained. The titanation of the SiO2 lead to a support framework that fractures earlier and more efficiently. This was evidenced by the presence of several empty (polymer‐free) cracks along the support dense‐shell, found more extensively in the Ti‐modified polymerized catalyst particle, which also resulted in a more sustained polymerized particles macroporosity during the course of the reaction. [ABSTRACT FROM AUTHOR] |
| Copyright of ChemCatChem is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 163821807 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Role of Titanium in Ti/SiO<subscript>2</subscript>‐Supported Metallocene‐based Olefin Polymerization Catalysts. Part 2: Particle Fragmentation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zanoni%2C+Silvia%22">Zanoni, Silvia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nikolopoulos%2C+Nikolaos%22">Nikolopoulos, Nikolaos</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Welle%2C+Alexandre%22">Welle, Alexandre</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cirriez%2C+Virginie%22">Cirriez, Virginie</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Weckhuysen%2C+Bert+M%2E%22">Weckhuysen, Bert M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> b.m.weckhuysen@uu.nl</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22ChemCatChem%22">ChemCatChem</searchLink>. 5/19/2023, Vol. 15 Issue 10, p1-12. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Metallocene+catalysts%22">Metallocene catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Alkenes%22">Alkenes</searchLink><br /><searchLink fieldCode="DE" term="%22Catalyst+supports%22">Catalyst supports</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerization%22">Polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Catalytic+activity%22">Catalytic activity</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopes%22">Scanning electron microscopes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A commercial SiO2 modified by the addition of a TiO2 layer on its surface and pore walls offers a support for metallocene‐based ethylene polymerization catalysts with a 35 % improved catalytic activity. The effect of such support modification on the catalyst particle fragmentation during polymerization reactions were assessed. This was performed by exposing the internal cross‐section of several SiO2 and Ti/SiO2‐based metallocene catalyst particles, polymerized at a wide range of reaction conditions, with a Focused‐Ion Beam Scanning Electron Microscope (FIB‐SEM), followed by a semi‐quantitative analysis of polymer, catalyst and macropores of each 2D image obtained. The titanation of the SiO2 lead to a support framework that fractures earlier and more efficiently. This was evidenced by the presence of several empty (polymer‐free) cracks along the support dense‐shell, found more extensively in the Ti‐modified polymerized catalyst particle, which also resulted in a more sustained polymerized particles macroporosity during the course of the reaction. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of ChemCatChem is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/cctc.202300221 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1 Subjects: – SubjectFull: Metallocene catalysts Type: general – SubjectFull: Polymers Type: general – SubjectFull: Alkenes Type: general – SubjectFull: Catalyst supports Type: general – SubjectFull: Polymerization Type: general – SubjectFull: Catalysts Type: general – SubjectFull: Catalytic activity Type: general – SubjectFull: Scanning electron microscopes Type: general Titles: – TitleFull: Role of Titanium in Ti/SiO2‐Supported Metallocene‐based Olefin Polymerization Catalysts. Part 2: Particle Fragmentation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zanoni, Silvia – PersonEntity: Name: NameFull: Nikolopoulos, Nikolaos – PersonEntity: Name: NameFull: Welle, Alexandre – PersonEntity: Name: NameFull: Cirriez, Virginie – PersonEntity: Name: NameFull: Weckhuysen, Bert M. IsPartOfRelationships: – BibEntity: Dates: – D: 19 M: 05 Text: 5/19/2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 18673880 Numbering: – Type: volume Value: 15 – Type: issue Value: 10 Titles: – TitleFull: ChemCatChem Type: main |
| ResultId | 1 |
