Mechanical and chemical recycling of solid plastic waste

Waste Management, Год журнала: 2017, Номер 69, С. 24 - 58

Опубликована: Авг. 18, 2017

Язык: Английский

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Chemical recycling to monomer for an ideal, circular polymer economy

Nature Reviews Materials, Год журнала: 2020, Номер 5(7), С. 501 - 516

Опубликована: Апрель 14, 2020

Язык: Английский

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Catalysis as an Enabling Science for Sustainable Polymers

Chemical Reviews, Год журнала: 2017, Номер 118(2), С. 839 - 885

Опубликована: Окт. 19, 2017

The replacement of current petroleum-based plastics with sustainable alternatives is a crucial but formidable challenge for the modern society. Catalysis presents an enabling tool to facilitate development polymers. This review provides system-level analysis polymers and outlines key criteria respect feedstocks are derived from, manner in which generated, end-of-use options. Specifically, we define as class materials that from renewable exhibit closed-loop life cycles. Among potential candidates, aliphatic polyesters polycarbonates promising due their resources excellent biodegradability. monomers, versatile synthetic routes convert these monomers polycarbonate, different options critically reviewed, focus on recent advances catalytic transformations lower technological barriers developing more replacements plastics.

Язык: Английский

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Advances and approaches for chemical recycling of plastic waste

Journal of Polymer Science, Год журнала: 2020, Номер 58(10), С. 1347 - 1364

Опубликована: Апрель 20, 2020

Abstract The global production and consumption of plastics has increased at an alarming rate over the last few decades. accumulation pervasive persistent waste plastic concomitantly in landfills environment. societal, ecological, economic problems waste/pollution demand immediate decisive action. In 2015, only 9% was successfully recycled United States. major current recycling processes focus on mechanical waste; however, even this process is limited by sorting/pretreatment degradation during process. An alternative to chemical waste. Efficient would allow for feedstocks various uses including fuels replace petrochemicals. This review focuses most recent advances three polymers found waste: PET, PE, PP. Commercial hydrolysable like polyesters or polyamides, polyolefins, mixed streams are also discussed.

Язык: Английский

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Polyethylene upcycling to long-chain alkylaromatics by tandem hydrogenolysis/aromatization

Science, Год журнала: 2020, Номер 370(6515), С. 437 - 441

Опубликована: Окт. 22, 2020

A new future for polyethylene Most current plastic recycling involves chopping up the waste and repurposing it in materials with less stringent engineering requirements than original application. Chemical decomposition at molecular level could, principle, lead to higher-value products. However, carbon-carbon bonds polyethylene, most common plastic, tend resist such approaches without exposure high-pressure hydrogen. F. Zhang et al. now report that a platinum/alumina catalyst can transform directly into long-chain alkylbenzenes, feedstock detergent manufacture, no need external hydrogen (see Perspective by Weckhuysen). Science , this issue p. 437 ; see also 400

Язык: Английский

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Food packaging in the circular economy: Overview of chemical safety aspects for commonly used materials

Journal of Cleaner Production, Год журнала: 2018, Номер 193, С. 491 - 505

Опубликована: Май 4, 2018

Food packaging facilitates storage, handling, transport, and preservation of food is essential for preventing waste. Besides these beneficial properties, causes rising concern the environment due to its high production volume, often short usage time, problems related waste management littering. Reduction, reuse, recycling, but also redesign support aims circular economy. These tools have potential decrease environmental impact packaging. In this article, we focus on chemical safety aspects recycled packaging, as recycling currently seen an important measure manage However, may increase levels potentially hazardous chemicals in -after migration- food. Since exposure certain migrating from has been associated with chronic diseases, it importance assess Therefore, describe processes commonly used materials, including plastics, paper board, aluminum, steel, multimaterial multilayers (e.g., beverage cartons). Further, give overview typical migrants all types summarize approaches reduce contamination. We discuss role economy, where only one many complementary providing environmentally-friendly safe

Язык: Английский

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The chemistry of chemical recycling of solid plastic waste via pyrolysis and gasification: State-of-the-art, challenges, and future directions

Progress in Energy and Combustion Science, Год журнала: 2021, Номер 84, С. 100901 - 100901

Опубликована: Фев. 21, 2021

Язык: Английский

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Environmental Impact of Food Packaging Materials: A Review of Contemporary Development from Conventional Plastics to Polylactic Acid Based Materials

Materials, Год журнала: 2020, Номер 13(21), С. 4994 - 4994

Опубликована: Ноя. 6, 2020

Plastics have remained the material of choice, and after serving their intended purpose, a large proportion ends up in environment where they persist for centuries. The packaging industry is largest growing consumer synthetic plastics derived from fossil fuels. Food account bulk plastic waste that are polluting environment. Additionally, given fact petroleum reserves finite facing depletion, there need development alternative materials can serve same purpose as conventional plastics. This paper reviews function highlights future potential adoption green materials. Biopolymers emerged promising although still very low market uptake. Polylactic acid (PLA) has most favoured bioplastic. However, it limited by its high cost some performance drawbacks. Blending with agricultural natural fillers result composites at cost, greenhouse gas emissions, improved food applications. continent Africa proposed rich source fibres be sustainably exploited to fabricate bid achieve circular economy.

Язык: Английский

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Solutions and Integrated Strategies for the Control and Mitigation of Plastic and Microplastic Pollution

International Journal of Environmental Research and Public Health, Год журнала: 2019, Номер 16(13), С. 2411 - 2411

Опубликована: Июль 7, 2019

Plastic pollution is generated by the unsustainable use and disposal of plastic products in modern society, threatening economies, ecosystems, human health. Current clean-up strategies have attempted to mitigate negative effects but are unable compete with increasing quantities entering environment. Thus, reducing inputs environment must be prioritized through a global multidisciplinary approach. Mismanaged waste major land-based source that can reduced improvements life-cycle plastics, especially production, consumption, disposal, an Integrated Waste Management System. In this review paper, we discuss current practices improve life cycle management plastics implemented reduce health environmental impacts pollution. Ten recommendations for stakeholders include (1) regulation production consumption; (2) eco-design; (3) demand recycled plastics; (4) (5) renewable energy recycling; (6) extended producer responsibility over waste; (7) collection systems; (8) prioritization (9) bio-based biodegradable (10) improvement recyclability e-waste.

Язык: Английский

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Managing Plastic Waste─Sorting, Recycling, Disposal, and Product Redesign

ACS Sustainable Chemistry & Engineering, Год журнала: 2021, Номер 9(47), С. 15722 - 15738

Опубликована: Ноя. 12, 2021

Over the years, petrochemical industry has developed a plethora of polymers that are contributing to well-being humanity. Irresponsible disposal used plastics has, however, led buildup litter, which is fouling environment, harming wildlife, and wasting valuable resources. This paper critically reviews challenge opportunities in converting plastic waste into feedstock for industry. It discusses (a) amount, quality, sorting waste; (b) mechanical recycling extraction or dissolution/precipitation; (c) chemical monomers other chemicals; (d) by incineration, biodegradation, landfill, microplastics. will, finally, broaden circularity discussion with life-cycle analyses (LCA), design recycling, future role renewable carbon as feedstock.

Язык: Английский

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