Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework
We report a systematic study on the gas-phase polymerization of ethylene by a metal–organic framework (MOF) catalyst. Cr3+-exchanged MFU-4l (Cr(III)-MFU-4l, MFU-4l = Zn5Cl4(BTDD)3, H2BTDD = bis(1H-1,2,3,-triazolo[4,5-b],[4′,5′-i])dibenzo[1,4]dioxin)) serves as an exemplary system to demonstrate prer...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
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2020
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| Online Access: | https://hdl.handle.net/1721.1/125651 |
| _version_ | 1826197386499719168 |
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| author | Park, Hoyoung Daniel Comito, Robert J. Wu, Zhenwei Zhang, Guanghui Ricke, Nathan Darrell Sun, Chenyue Van Voorhis, Troy Miller, Jeffrey T. Roman-Leshkov, Yuriy Dinca, Mircea |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Park, Hoyoung Daniel Comito, Robert J. Wu, Zhenwei Zhang, Guanghui Ricke, Nathan Darrell Sun, Chenyue Van Voorhis, Troy Miller, Jeffrey T. Roman-Leshkov, Yuriy Dinca, Mircea |
| author_sort | Park, Hoyoung Daniel |
| collection | MIT |
| description | We report a systematic study on the gas-phase polymerization of ethylene by a metal–organic framework (MOF) catalyst. Cr3+-exchanged MFU-4l (Cr(III)-MFU-4l, MFU-4l = Zn5Cl4(BTDD)3, H2BTDD = bis(1H-1,2,3,-triazolo[4,5-b],[4′,5′-i])dibenzo[1,4]dioxin)) serves as an exemplary system to demonstrate prereaction treatment with alkylaluminum species as a simple method to isolate an active MOF catalyst for liquid-free polymerization of ethylene. AlMe3-treated Cr(III)-MFU-4l subjected to 40 bar of ethylene exhibits a polymerization activity of 52 000 molEthylene·molCr–1·h–1, an order of magnitude higher than that observed in a slurry-phase reaction with Cr(III)-MFU-4l and excess alkylaluminum species. Furthermore, product polyethylene exhibits a low polydispersity index of 1.36 and a free-flowing granular morphology favorable for industrial processing, highlighting the advantages conferred by the single-site MOF catalysts in gas-phase ethylene polymerization. Keywords:metal−organic framework; heterogeneous catalysis; single-site catalyst; polyethylene; gas-phase polymerization |
| first_indexed | 2024-09-23T10:47:15Z |
| format | Article |
| id | mit-1721.1/125651 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:47:15Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | mit-1721.1/1256512022-09-30T23:00:50Z Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework Park, Hoyoung Daniel Comito, Robert J. Wu, Zhenwei Zhang, Guanghui Ricke, Nathan Darrell Sun, Chenyue Van Voorhis, Troy Miller, Jeffrey T. Roman-Leshkov, Yuriy Dinca, Mircea Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. Department of Chemical Engineering We report a systematic study on the gas-phase polymerization of ethylene by a metal–organic framework (MOF) catalyst. Cr3+-exchanged MFU-4l (Cr(III)-MFU-4l, MFU-4l = Zn5Cl4(BTDD)3, H2BTDD = bis(1H-1,2,3,-triazolo[4,5-b],[4′,5′-i])dibenzo[1,4]dioxin)) serves as an exemplary system to demonstrate prereaction treatment with alkylaluminum species as a simple method to isolate an active MOF catalyst for liquid-free polymerization of ethylene. AlMe3-treated Cr(III)-MFU-4l subjected to 40 bar of ethylene exhibits a polymerization activity of 52 000 molEthylene·molCr–1·h–1, an order of magnitude higher than that observed in a slurry-phase reaction with Cr(III)-MFU-4l and excess alkylaluminum species. Furthermore, product polyethylene exhibits a low polydispersity index of 1.36 and a free-flowing granular morphology favorable for industrial processing, highlighting the advantages conferred by the single-site MOF catalysts in gas-phase ethylene polymerization. Keywords:metal−organic framework; heterogeneous catalysis; single-site catalyst; polyethylene; gas-phase polymerization Office of Basic Energy Sciences (grant no. DE-SC0016214) National Science Foundation CAREER (grant no. DMR-1452612) 2020-06-03T18:50:44Z 2020-06-03T18:50:44Z 2020-03 Article http://purl.org/eprint/type/JournalArticle 2155-5435 https://hdl.handle.net/1721.1/125651 Park, Hoyoung Daniel, et al., "Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework." ACS Catalysis 10, 6 (Mar. 2020): p. 3864-70 doi 10.1021/acscatal.9b03282 ©2020 Author(s) 10.1021/acscatal.9b03282 ACS Catalysis Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf ACS |
| spellingShingle | Park, Hoyoung Daniel Comito, Robert J. Wu, Zhenwei Zhang, Guanghui Ricke, Nathan Darrell Sun, Chenyue Van Voorhis, Troy Miller, Jeffrey T. Roman-Leshkov, Yuriy Dinca, Mircea Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title | Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title_full | Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title_fullStr | Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title_full_unstemmed | Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title_short | Gas Phase Ethylene Polymerization by Single-Site Cr Centers in a MetalOrganic Framework |
| title_sort | gas phase ethylene polymerization by single site cr centers in a metalorganic framework |
| url | https://hdl.handle.net/1721.1/125651 |
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