Plastic waste as pyrolysis feedstock for plastic oil production: A review

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 877, P. 162719 - 162719

Published: March 16, 2023

Language: Английский

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Polyethylene terephthalate (PET) recycling: A review

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100673 - 100673

Published: Feb. 23, 2024

It is difficult to reuse wastes from polymers due the mismatch between amount of contaminants and secondary quality feed. This type operation much more expensive cost-effective than production polymer raw materials latest materials. However, recyclable beneficial if used extensively in various concrete products wood-polymer boards. done only cleaning sorting are not particularly important for products. Polyethylene terephthalate (PET) a widely industries its excellent physical chemical properties. Besides, increasing use PET has led global crisis waste management, as improper disposal caused significant environmental damage. major source accumulated landfills, address this issue, recycling methods have evolved. In regard, present review examines techniques involved PET. Conventional influence diverse depolymerization reaction variables were discussed, upsides downsides each technique considered. The summarizes advances technologies plastic waste, focusing on bio-recycling PET, aiming sustainable, economical solutions circular economy.

Language: Английский

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From plastic waste pyrolysis to Fuel: Impact of process parameters and material selection on hydrogen production

Fuel, Journal Year: 2023, Volume and Issue: 344, P. 128107 - 128107

Published: March 24, 2023

Hydrogen is an energy carrier that can be utilized in various applications, including power plants, the synthesis of high-value products, and clean transportation fuels without emissions. Hence, hydrogen a potential candidate replace fossil reduce environmental pollution. The high demand for plastics driving production rate to increase yearly, leading great accumulation plastic waste materials resulting severe burden on environment. Thermo-catalytic conversion other promising route efficiently provide ideal long-term solution necessary overcome this challenge. Developing durable high-efficiency catalysts immerge from wastes industrial scale still challenge researchers. This study comprehensively summarizes discusses recently published literature using different thermo-catalytic processes, pyrolysis, pyrolysis-air gasification, pyrolysis-steam reforming, pyrolysis- (CO2) dry pyrolysis-plasma catalysis. scope review focus influence supports, method yield hydrogen, impact several crucial reaction parameters like pyrolysis temperature, catalytic catalyst plastic, steam ratios inclusive as well. conclusions will extremely valuable researchers interested sustainable generation H2 materials.

Language: Английский

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A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

Polymer Engineering and Science, Journal Year: 2023, Volume and Issue: 63(9), P. 2651 - 2674

Published: June 21, 2023

Abstract Polyethylene terephthalate (PET) is used in textile and packaging industries. The main source of PET production fossil fuels with limited capacity. Also, products are single use that transform into high volumes wastes, causing ecosystem problems. Recycling proposed to confront this challenge. four major recycling techniques mechanical, chemical, pyrolysis, enzymatic. Mechanical, enzymatic have constrained capabilities manage waste. Chemical the potential path expanding waste possibility upcycling addressing dirty streams. Several chemical methods introduced discussed literature. five glycolysis, alcoholysis, aminolysis, ammonolysis, hydrolysis. This review describes depolymerization via these introduces hydrolysis as one can depolymerize an organic‐free solvent environment. Hydrolysis tolerates mixed wastes streams including copolymers. It helps avoid challenges attributed using organic solvents reaction systems. Moreover, produces terephthalic acid, monomer, which has recently gained attention initiative monomer for production. focuses on three forms hydrolysis—alkaline, neutral, by presenting background studies, issued patents, recent trends application

Language: Английский

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Additive manufacturing for sustainability and circular economy: needs, challenges, and opportunities for 3D printing of recycled polymeric waste

Materials Today Sustainability, Journal Year: 2023, Volume and Issue: 24, P. 100529 - 100529

Published: Sept. 5, 2023

Polymer-based product usage rapidly increases globally, leading to severe ecological, social, environmental, health, and economic impacts. There has been an international push for solutions sustainable production, consumption, end-of-life plastics combat these issues. Moreover, additive manufacturing (AM) or 3D printing (3DP) processes provide rapid fabrication of functional parts in lesser time, lower lead times, research development costs. Due reasons, are now being utilized different industrial sectors, including aerospace, automotive, biomedical, sports, food, electronics, construction. The circular economy concept integrated with AM can deliver a synergic impact new life discarded polymeric distributed recycling manufacturing. With the adoption proper techniques, be used widely reuse polymer wastes turn them into valuable products. It much higher levels at very low cost targeted applications. Therefore, this study, comprehensive literature review is performed outline guidelines model recycled polymers based on reviewed literature. This study delivers insight into; commodity their uses, challenges recycling, approaches, polymers.

Language: Английский

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Sustainable and green membranes for chemical separations: A review

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 336, P. 126271 - 126271

Published: Jan. 3, 2024

Language: Английский

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Descriptive review on conversion of waste residues into valuable bionanocomposites for a circular bioeconomy

Nano-Structures & Nano-Objects, Journal Year: 2024, Volume and Issue: 39, P. 101265 - 101265

Published: Aug. 2, 2024

Language: Английский

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A waste separation system based on sensor technology and deep learning: A simple approach applied to a case study of plastic packaging waste

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 450, P. 141762 - 141762

Published: March 12, 2024

Plastic waste pollution is a challenging and complex issue caused mainly by high consumption of single-use plastics the linear economy "extract-make-use-throw". Improvements in recycling efficiency, behaviour changes, circular business models, more precise management system are essential to reduce volume plastic waste. This paper proposes simplified conceptual model for smart separation based on sensor technology deep learning (DL) facilitate recovery recycling. The proposed could be applied either at source (in bins) or centralised sorting facility. Two systems have been investigated: i) one utilising 6 sensors (near-infrared (NIR), humidity, temperature, CO2, CH4, laser profile sensor) ii) with an RGB camera separate packaging materials their composition, size, cleanliness, appearance. Simulations case study showed that camera-based sorting, Inception-v3, DL convolution neural networks (CNN), achieved best overall accuracy (78%) compared ResNet-50, MobileNet-v2, DenseNet-201. In addition, resulted higher number misclassified items bins, as it focused solely appearance rather than material composition. Sensor-based faced limitations, particularly dark colouration organic matter entrapment. Combining information from cameras potentially mitigate limitations each individual method, thus resulting purity separated fractions.

Language: Английский

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Removal of microplastics in food packaging industry wastewaters with electrocoagulation process: Optimization by Box-Behnken design

Chemosphere, Journal Year: 2024, Volume and Issue: 352, P. 141314 - 141314

Published: Jan. 27, 2024

Language: Английский

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A Comprehensive Review on Cellulose Nanofibers, Nanomaterials, and Composites: Manufacturing, Properties, and Applications

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(5), P. 356 - 356

Published: Feb. 25, 2025

Cellulose nanofibers (CNFs), cellulose nanomaterials (CNMs), and cellulose-based composites represent a convergence of material science, sustainability, advanced engineering, paving the way for innovative eco-friendly materials. This paper presents comprehensive review these materials, encompassing their extraction, preparation methods, properties, applications, future directions. The manufacturing CNFs CNMs leverages diverse techniques-chemical, mechanical, enzymatic-with each offering distinct advantages in tailoring characteristics to meet specific needs. Strategies functionalization surface modification are detailed, highlighting role enhancing properties while addressing challenges scaling production industrial levels. structural, thermal, optical, electrical, biocompatibility CNFs, CNMs, explored, underscoring versatility applications across various industries. Cellulose-based composites, particular, demonstrate exceptional tunable uses, although achieving uniform dispersion remains key technical hurdle. These materials have packaging, automotive, aerospace, biomedical devices, energy storage, environmental remediation. Emerging research trends emphasize integration with technologies, promoting sustainable practices life cycle considerations advancing commercialization potential. rapidly evolving field holds immense promise global by creating high-performance, is crucial understanding nanofibers, nanomaterials, providing valuable insights that will drive development sustainable, high-performance wide range ultimately challenges.

Language: Английский

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