Tuning High-Density Polyethylene Hydrocracking through Mordenite Zeolite Crystal Engineering
| Author(s) | Kots, Pavel A. | |
| Author(s) | Doika, Panagiota A. | |
| Author(s) | Vance, Brandon C. | |
| Author(s) | Najmi, Sean | |
| Author(s) | Vlachos, Dionisios G. | |
| Date Accessioned | 2023-09-05T15:29:08Z | |
| Date Available | 2023-09-05T15:29:08Z | |
| Publication Date | 2023-06-19 | |
| Description | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry and Engineering, copyright © 2023 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acssuschemeng.3c01515. This article will be embargoed until 06/19/2024. | |
| Abstract | We investigate the hydrocracking of high-density polyethylene using a bifunctional Pt/Al2O3 and modified mordenite acid catalyst. Mass transport limitations impact polymer diffusion into the mordenite pore complex. Initial reaction intermediates are formed on the zeolite’s outer surface. Intercrystallite open-end mesopores improve the diffusion of reaction intermediates deeper into the crystal. Recrystallization and desilication of mordenite lead to a higher polymer conversion and shift the product distribution maximum from pentanes to hexanes and heptanes. The nature of mesopores (occluded or open) and total Brønsted acidity significantly impact zeolite activity and selectivity. | |
| Sponsor | P.A.D. and S.N. acknowledge the support from the National Science Foundation under grant no. 2119754. P.A.K., P.A.D., and B.C.V. were funded by the University of Delaware Center for Plastics Innovation, supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences under Award no DE-SC0021166. This research used instruments in the Advanced Materials Characterization Lab (AMCL) at the University of Delaware. The authors used the NMR facilities at the University of Delaware, founded by the Delaware COBRE program, supported by a grant from the National Institute of General Medical Sciences─NIGMS (5 P30 GM110758-02) from the National Institutes of Health. Notes The authors declare the following competing financial interest(s): D.G.V. is an inventor of the WO 2021/257783 A1 patent on plastic hydrocracking. The other authors declare no competing financial interest. | |
| Citation | Kots, Pavel A., Panagiota A. Doika, Brandon C. Vance, Sean Najmi, and Dionisios G. Vlachos. “Tuning High-Density Polyethylene Hydrocracking through Mordenite Zeolite Crystal Engineering.” ACS Sustainable Chemistry & Engineering 11, no. 24 (June 19, 2023): 9000–9009. https://doi.org/10.1021/acssuschemeng.3c01515. | |
| ISSN | 2168-0485 | |
| URL | https://udspace.udel.edu/handle/19716/33285 | |
| Language | en_US | |
| Publisher | ACS Sustainable Chemistry and Engineering | |
| Keywords | plastic waste | |
| Keywords | circularity | |
| Keywords | diffusion limitations | |
| Keywords | mesoporosity | |
| Title | Tuning High-Density Polyethylene Hydrocracking through Mordenite Zeolite Crystal Engineering | |
| Type | Article |
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