Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150332 - 150332
Published: March 11, 2024
Language: Английский
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 28, 2025
The increasing accumulation of plastic waste in the environment poses a serious threat to ecosystem and health sector, urging us develop sustainable strategies tackle this issue. Converting into platform chemicals using energy primary resources can mitigate environmental pollution reduce CO2 emissions. In study, polyolefins were transformed syngas through wet reforming process over nickel-supported oxygen vacancy-rich titanium dioxide (Ni/TiO2-x) catalyst with water as reactant under light irradiation. focused irradiation readily increase temperature reactor for dehydrogenation degradation polyethylene (PE) occur, followed by PE-derived compounds gaseous hydrocarbons syngas. Additionally, transfer electrons from TiO2-x nickel components facilitates aforementioned reactions. current work presents strategy valorization syngas, serving feedstock subsequent production various chemicals.
Language: Английский
Citations
1
Chemical Science, Journal Year: 2023, Volume and Issue: 15(3), P. 795 - 831
Published: Dec. 8, 2023
The critical task of activating and cleaving inert C–C bonds during plastic upcycling recycling holds substantial importance.
Language: Английский
Citations
20
ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(24), P. 15886 - 15898
Published: Nov. 27, 2023
Despite substantial efforts in recent years to address the challenges of plastic waste management, chemical upcycling plastics remains significantly hindered due inefficiencies and instability catalysts. In this study, we conducted upgrading using PtSn-based hydrocracking catalysts promoted with cerium at different loadings under mild reaction conditions. Our results demonstrate a crucial role for enhancing performance PtSn catalysts, optimal observed loading approximately 0.5 wt %. Over 77 % gasoline-range products (C5–C12) can be obtained from cracking high-density polyethylene (HDPE) 270 °C 30 bar hydrogen 2 h, representing highest yield reported date. Cerium incorporation into conferred several beneficial effects, including refining size distribution produce smaller particles, thereby improving resistance both metal sintering coke formation. Furthermore, doping enhanced concentration strength strong Brønsted acid sites (BAS) on SiO2–Al2O3 support. Finally, introduction reducibility platinum mitigated poisoning effects tin. research underscores potential cerium-promoted effectively degrading thermoplastic mixtures commercial plastic-containing dyes impurities, converting these materials valuable products.
Language: Английский
Citations
17
Advanced Science, Journal Year: 2024, Volume and Issue: unknown
Published: July 8, 2024
Abstract Waste plastics bring about increasingly serious environmental challenges, which can be partly addressed by their interconversion into valuable compounds. It is hypothesized that the porosity and acidity of a zeolite‐based catalyst will affect selectivity effectiveness, enabling controllable selective conversion polyethylene (PE) gas‐diesel or lubricating base oil. A series embryonic, partial‐ well‐crystalline zeolites beta with adjustable are prepared from mesoporous SBA‐15. The catalysts catalytic systems studied nuclear magnetic resonance (NMR), X‐ray diffraction (XRD), adsorption kinetics reactions. zeolite‐beta‐based achieve toward oil for PE cracking. With mesopores appropriate acid sites, fast escape reduced production cracking intermediates observed, leading to significant fraction (88.7%) more micropores, high density, strong strength, multiply cracked low carbon number hydrocarbons. center zeolite confirmed facilitate significantly activation hydrogen (H 2 ), and, an in situ ammonia poisoning strategy inhibit transfer effectively regulate product distribution.
Language: Английский
Citations
8
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150332 - 150332
Published: March 11, 2024
Language: Английский
Citations
7