Population Balance Models for Catalytic Depolymerization: From Elementary Steps to Multiphase Reactors

Accounts of Chemical Research, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

ConspectusThe ongoing accumulation of plastic waste in landfills and the environment is driving research on chemical processes catalysts to recycle polymers. Traditional modeling strategies are not applicable these because they involve too many reactants intermediates, one for each molecular weight functionalization. To model kinetics, we have developed population balance models (PBMs) that account macromolecular bulk catalytic intermediates. These PBMs couple other through polymer adsorption desorption traditional rate equations small molecule products co-reactants (like hydrogen or ethylene). The models, combination with experimental data, being used ways: (i) test mechanistic hypotheses, (ii) extract parameters, (iii) quantitatively compare catalyst activities, (iv) mass transfer vapor-liquid partitioning two-phase reactors, (v) design novel support architectures mimic processive action natural depolymerization enzymes. Some key theoretical advances allow be constructed from elementary rates mechanisms, as opposed formulations pseudoelementary parameters invoked fitting parameters. We discuss ways build "bottom-up" first-principles calculations "top down" analyses data. provides a quantitative bridge between kinetics complex transformations upcycling beyond.

Язык: Английский

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Co-upcycling of mixed polypropylene and polyesters

Green Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Mixed plastic waste management has long been a major challenge owing to complex compositions of wastes and high sorting costs.

Язык: Английский

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Recent progress of waste plastic upcycling based on multifunctional zeolite catalysts

Chemical Synthesis, Год журнала: 2024, Номер 4(2)

Опубликована: Май 28, 2024

The chemical upcycling method is a promising strategy to alleviate the pollution problem of waste plastics by tapping into their intrinsic value and converting them high value-added products. Zeolite-based catalysts are one surprising efficient classes thermocatalytic materials that have recently attracted considerable attention for plastic upcycling. They designed targeted applications with wide range adjustable acidic sites, multiple pore structures, synergistic interactions surface metals. In this review, we categorize being converted different high-value products introduce role zeolite-based in thermal plastics. structure-performance relationships catalytic reactions discussed depth. Finally, future development these multifunctional applied outlined.

Язык: Английский

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Constructing the Al deficiency in Si-O(H)-Al units based on Pt/ZSM-5 for enhanced hydrocracking of polyethylene into high-quality liquid fuel

Nano Research, Год журнала: 2024, Номер 17(11), С. 10088 - 10098

Опубликована: Авг. 9, 2024

Язык: Английский

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Polyethylene hydrogenolysis over bimetallic catalyst with suppression of methane formation

Frontiers of Chemical Science and Engineering, Год журнала: 2024, Номер 18(10)

Опубликована: Июнь 24, 2024

Язык: Английский

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