Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125359 - 125359
Published: April 1, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)
Published: April 22, 2024
Catalytic upcycling of polyolefins into high-value chemicals represents the direction in end-of-life plastics valorization, but poses great challenges. Here, we report synthesis a tandem porous catalyst via micelle cascade assembly strategy for selectively catalytic cracking polyethylene olefins at low temperature. A hierarchically silica layer from mesopore to macropore is constructed on surface microporous ZSM-5 nanosheets through dynamic micelles. The outer arrays can adsorb bulky quickly by capillary and hydrophobic effects, enhancing diffusion access active sites. middle mesopores present nanoconfinement space, pre-cracking intermediates weak acid sites, which then transport zeolites micropores further strong Brønsted acidic structures, mimicking biomimetic protease clefts, ideally match steps polyolefins, thus suppressing coke formation facilitating product escape. As result, light hydrocarbons (C
Language: Английский
Citations
7
Catalysts, Journal Year: 2024, Volume and Issue: 14(7), P. 450 - 450
Published: July 12, 2024
The extensive use of plastics has led to a significant environmental threat due the generation waste plastic, which shown challenges during recycling. catalytic hydrocracking route, however, is viewed as key strategy manage this fossil-fuel-derived into plastic-derived fuels with lower carbon emissions. Despite numerous efforts identify an effective bi-functional catalyst, especially metal-loaded zeolites, high-performing zeolite for yet be synthesized. This microporous nature zeolite, results in diffusional limitations bulkier polymer molecules entering structure and reducing overall cracking plastic catalyst cycle time. These constraints can overcome by developing hierarchical zeolites that feature shorter diffusion paths larger pore sizes, facilitating movement bulky molecules. However, if modification process not controlled, it lead synthesis compromised functionality or structural integrity, resulting reduced conversion plastics. Therefore, we provide overview various methods synthesizing emphasizing advancements over past two decades innovative strategies introduce additional systems. objective review study approaches based on their effectiveness while clear link between optimized preparation structure-activity relationship used
Language: Английский
Citations
7
Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147611 - 147611
Published: Nov. 22, 2023
Language: Английский
Citations
15
RSC Advances, Journal Year: 2024, Volume and Issue: 14(23), P. 15856 - 15861
Published: Jan. 1, 2024
High efficiency hydrocracking degradation of mixed polyolefin polymers is achieved under mild circumstances by Ni-based catalysts supported on Hbeta.
Language: Английский
Citations
4
JACS Au, Journal Year: 2024, Volume and Issue: 4(11), P. 4361 - 4373
Published: Oct. 11, 2024
The chemical upcycling of plastic wastes by converting them into valuable fuels and chemicals represents a sustainable approach as opposed to landfilling incineration. However, it encounters challenges in dealing with mixed due their complex composition sorting/cleaning costs. Here, we present one-pot hydrodeoxygenation (HDO) method for containing poly(ethylene terephthalate) (PET), polycarbonate (PC), poly(phenylene oxide) (PPO) naphthenes under mild reaction conditions. To facilitate this process, developed cost-effective, contaminant-tolerant, reusable Ni/HZSM-5 bifunctional catalyst through an ethylene glycol-assisted impregnation method. metallic Ni site plays pivotal role catalyzing C-O C-C cleavages well hydrogenation reactions, while the acidic HZSM-5 facilitates dehydration isomerization reactions. collaboration between metal acid dual sites on enabled efficient HDO wide range substrates, including bottles, textile fibers, pellets, sheets, CDs/DVDs, plastics without cleaning or pigments removal even various mixtures, high yield up 99% at 250 °C 4 MPa H
Language: Английский
Citations
4
ACS Catalysis, Journal Year: 2024, Volume and Issue: 15(2), P. 841 - 868
Published: Dec. 27, 2024
Catalytic conversion of waste plastic has attracted widespread attention due to pressing environmental issues and energy crisis. Although some methods have been successful in converting single-component waste, unfortunately, the real-world typically made up a mixture various plastics, which poses significant difficulties challenges for catalyst selection product distribution catalytic mixed plastic. Recently, number new technologies developed address plastic, aiming overcome limitations current drive progress this field. This review summarizes recycling upgrading into monomers or value-added chemicals by thermocatalysis, photocatalysis/photothermal catalysis, tandem chemical-biocatalysis. The construction efficient catalysts, understanding reaction pathways, design systems, practical applicability each method are highlighted discussed detail. Our goal is elucidate mechanisms principles process design, providing guidance development, integration optimization that enhance efficiency processing capabilities waste. Furthermore, economic feasibility impact treatment were comprehensively evaluated summarizing techno-economic analysis life cycle assessment studies. Lastly, remaining technological future directions industrial-scale generate products described.
Language: Английский
Citations
4
Environmental Advances, Journal Year: 2025, Volume and Issue: unknown, P. 100610 - 100610
Published: Jan. 1, 2025
Language: Английский
Citations
0
Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111220 - 111220
Published: Jan. 1, 2025
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160869 - 160869
Published: Feb. 1, 2025
Language: Английский
Citations
0
Published: Jan. 1, 2025
Language: Английский
Citations
0