Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148827 - 148827
Published: Jan. 18, 2024
Language: Английский
Green Chemistry, Journal Year: 2023, Volume and Issue: 25(5), P. 1704 - 1728
Published: Jan. 1, 2023
Publication of the E Factor drew attention to problem waste in chemicals manufacture. Thirty yeas later it is abundantly clear that underlying cause global environmental problems, from climate change plastic pollution.
Language: Английский
Citations
147
Science, Journal Year: 2023, Volume and Issue: 381(6658), P. 666 - 671
Published: Aug. 10, 2023
Conversion of plastic wastes to fatty acids is an attractive means supplement the sourcing these high-value, high-volume chemicals. We report a method for transforming polyethylene (PE) and polypropylene (PP) at ~80% conversion with number-average molar masses up ~700 670 daltons, respectively. The process applicable municipal PE PP their mixtures. Temperature-gradient thermolysis key controllably degrading into waxes inhibiting production small molecules. are upcycled by oxidation over manganese stearate subsequent processing. ꞵ-scission produces more olefin wax yields higher acid-number than does ꞵ-scission. further convert large-market-volume surfactants. Industrial-scale technoeconomic analysis suggests economic viability without need subsidies.
Language: Английский
Citations
130
Progress in Materials Science, Journal Year: 2022, Volume and Issue: 132, P. 101035 - 101035
Published: Oct. 19, 2022
Language: Английский
Citations
119
ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(24), P. 14882 - 14901
Published: Nov. 23, 2022
Polyolefins, the largest used commodity plastics in world, find extensive application many fields. However, most end up landfills or incineration, leading to severe ecological crises, environmental pollution, and serious resource waste problems. As representatives on chemical upcycling of polyolefin fuels bulk/fine chemicals, catalytic cracking hydrocracking based zeolite metal/zeolite composite catalysts are considered effective paths due their large capacity strong adaptability existing petrochemical equipment. After an overview reaction mechanisms pyrolysis cracking, this review aims comprehensively discuss influence catalyst structure (acidity, pore structure, morphology) activity, selectivity, stability particularly emphasizing importance for matching acidity target product formation. Subsequently, structure–activity relationship between metal site zeolite's acid is also discussed. In end, emerging opportunities challenges proposed promote a more efficient way upcycling.
Language: Английский
Citations
111
Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(51), P. 23280 - 23285
Published: Dec. 16, 2022
Among commercial plastics, polyolefins are the most widely produced worldwide but have limited recyclability. Here, we report a chemical recycling route for conversion of post-consumer high-density polyethylene (HDPE) into telechelic macromonomers suitable circular reprocessing. Unsaturation was introduced HDPE by catalytic dehydrogenation using an Ir-POCOP catalyst without alkene acceptor. Cross-metathesis with 2-hydroxyethyl acrylate followed hydrogenation transformed partially unsaturated macromonomers. The direct repolymerization gave brittle material due to low overall weight-average molecular weight. Aminolysis small amount diethanolamine increased functionality. resulting were repolymerized through transesterification generate polymer comparable mechanical properties starting waste. Depolymerization catalyzed organic base regenerated macromonomers, thereby allowing waste materials enter pathway.
Language: Английский
Citations
101
Science, Journal Year: 2023, Volume and Issue: 381(6658), P. 660 - 666
Published: Aug. 10, 2023
Waste plastics are an abundant feedstock for the production of renewable chemicals. Pyrolysis waste produces pyrolysis oils with high concentrations olefins (>50 weight %). The traditional petrochemical industry uses several energy-intensive steps to produce from fossil feedstocks such as naphtha, natural gas, and crude oil. In this work, we demonstrate that oil can be used aldehydes through hydroformylation, taking advantage olefin functionality. These then reduced mono- dialcohols, oxidized dicarboxylic acids, or aminated diamines by using homogeneous heterogeneous catalysis. This route high-value oxygenated chemicals low-value postconsumer recycled polyethylene. We project produced could lower greenhouse gas emissions ~60% compared their petroleum feedstocks.
Language: Английский
Citations
81
Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101713 - 101713
Published: June 25, 2023
Language: Английский
Citations
79
Nature Nanotechnology, Journal Year: 2023, Volume and Issue: 18(7), P. 772 - 779
Published: June 26, 2023
Language: Английский
Citations
78
Nature Sustainability, Journal Year: 2023, Volume and Issue: 6(12), P. 1685 - 1692
Published: Oct. 9, 2023
Language: Английский
Citations
71
Science, Journal Year: 2023, Volume and Issue: 382(6668), P. 310 - 314
Published: Oct. 19, 2023
Polyolefins are the most important and largest volume plastics produced. Unfortunately, enormous use of lack effective disposal or recycling options have created a plastic waste catastrophe. In this work, we report an approach to create chemically recyclable polyolefin-like materials with diverse mechanical properties through construction multiblock polymers from hard soft oligomeric building blocks synthesized ruthenium-mediated ring-opening metathesis polymerization cyclooctenes. The exhibit broad properties, spanning elastomers plastomers thermoplastics, while integrating high melting transition temperature (
Language: Английский
Citations
60