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ClearПЕРСПЕКТИВИ НИЗЬКОТЕМПЕРАТУРНОГО КАТАЛІТИЧНОГО КРЕКІНГУ ПОЛІСТИРОЛУ ЗА АТМОСФЕРНОГО ТИСКУ
Researchers reviewed low-temperature catalytic cracking of polystyrene at atmospheric pressure as a chemical recycling strategy, emphasizing how it avoids toxic emissions and produces liquid oils and fuel additives. The approach is presented as more energy-efficient than mechanical or thermal recycling methods.
Renewable aromatics from the degradation of polystyrene under mild conditions
Researchers developed a bimetallic iron-copper catalyst that breaks down polystyrene plastic into useful aromatic chemicals at just 250°C, producing a liquid yield of 66% without coke or gas waste. This low-temperature method offers a promising way to convert polystyrene waste into valuable raw materials for industry.
Enhancing sustainable waste management: Hydrothermal carbonization of polyethylene terephthalate and polystyrene plastics for energy recovery
Researchers applied hydrothermal carbonization to PET and polystyrene plastics and found PET produces higher-energy hydrochar with better energy densification (1.37 vs. 1.13) than polystyrene, identifying key structural transformations that determine each material's potential for energy recovery from plastic waste.
Hydrothermal carbonization of plastic waste: A review of its potential in alternative energy applications
Researchers reviewed how hydrothermal carbonization — a process that converts materials into a coal-like substance using heat and water under pressure — can transform plastic waste into useful products like solid fuels, catalysts, and materials for energy storage devices. While the technology is promising, challenges like variable plastic feedstock quality and scaling up production must be addressed before widespread commercial use.
Hydrothermal liquefaction of plastics: a survey of the effect of reaction conditions on the reaction efficiency
This review summarizes how hydrothermal liquefaction, a process that uses hot pressurized water, can be used to chemically recycle waste plastics. Researchers examined how different reaction conditions affect the efficiency of breaking down plastics into useful products. The study suggests that this technique holds promise as a practical approach to addressing the global plastic waste crisis.
Base- or acid-assisted polystyrene plastic degradation in supercritical CO2
Researchers demonstrated that polystyrene plastic can be chemically degraded in supercritical CO₂ at 400°C when assisted by base or acid solutions, finding the process converts PS into hydrogen-rich gases and could offer a feasible route for disposing of plastic waste.
ReaxFF molecular dynamics studies on the impact of reaction conditions in polystyrene conversion through hydrothermal gasification
Researchers used computer simulations to model how hydrothermal gasification — a process that uses hot pressurized water — breaks down polystyrene microplastics into hydrogen-rich syngas, finding that temperature is the key control factor and that water plays a dual role in both aiding and hindering the reaction.
Optimisation of Process Parameters to Maximise the Oil Yield from Pyrolysis of Mixed Waste Plastics
Researchers optimized the process parameters for thermal pyrolysis of mixed waste plastics to maximize oil yield from HDPE, polypropylene, and polystyrene. The study used response surface methodology to identify ideal conditions for converting plastic waste into pyrolytic oil, supporting chemical recycling as a strategy to reduce plastic pollution.
Thermal Characterization and Recycling of Polymers from Plastic Packaging Waste
Scientists collected and analyzed 23 random plastic packaging waste samples from food and non-food products in Greece, identifying polyethylene, PET, polypropylene, and polystyrene as the most common polymers. Using pyrolysis, they broke these plastics down into valuable chemical products including monomers like styrene and ethylene. The research demonstrates that better characterization and recycling of packaging waste could recover useful materials and help reduce the roughly 62% of plastic packaging that currently goes unrecycled in Europe.
Vacuum pyrolysis depolymerization of waste polystyrene foam into high-purity styrene using a spirit lamp flame for convenient chemical recycling
Researchers developed a simple method for recycling waste polystyrene foam by vacuum pyrolysis over a spirit lamp flame for just 20 minutes, producing styrene monomer at 98% purity without additional purification steps, enabling low-cost closed-loop chemical recycling.
Optimization of Pressurized Alkaline Hydrolysis for Chemical Recycling of Post-Consumer PET Waste
This study optimized pressurized alkaline hydrolysis conditions for chemically recycling post-consumer PET waste into its constituent monomers, demonstrating a pathway to improve the efficiency of PET depolymerization.
Direct numerical simulations of polypropylene gasification in supercritical water
This paper is not about microplastics; it uses computational fluid dynamics simulations to study the gasification of polypropylene plastic waste in supercritical water as a potential waste-treatment technology.
Hydrothermal liquefaction: A promising technology for renewable energy and environmental clean-up applications
This review examines hydrothermal liquefaction (HTL), a technology that converts wet biomass into bio-crude oil under high temperature and pressure, with applications in both renewable energy and environmental cleanup. The authors discuss how HTL can be used to process various waste materials, including plastic-contaminated biomass, into useful fuel products. The technology shows promise as a way to address both energy needs and environmental contamination challenges simultaneously.
Front cover
This entry is a front cover image for a journal issue focused on polystyrene microplastics interactions, with only a fragment of the cover description available. No primary research data is presented in this item.
A Comprehensive Review on the Thermochemical Treatment of Plastic Waste to Produce High Value Products for Different Applications
This review summarizes methods for converting plastic waste into valuable products using high-temperature chemical processes like pyrolysis and plasma technology. These approaches can produce hydrogen fuel, carbon nanotubes, and other useful materials from plastic that would otherwise become pollution. Reducing plastic waste through better recycling technology is important because most microplastic pollution originates from improperly managed plastic products.
Conversion of Polyolefin Waste Into Fuels and Other Valuable Products by Hydrothermal Processing
This research explored ways to convert plastic waste, including polyolefins like polyethylene and polypropylene, into usable fuels and other valuable products through hydrothermal processing. Finding efficient recycling pathways is critical given that only 9% of the 350 million tons of plastic waste generated annually is currently recycled.
Thermal oxo-degradation of plastic wastes to valuable compounds
Researchers advanced thermal oxo-degradation as an alternative to conventional pyrolysis for plastic waste upcycling, demonstrating that introducing air into the thermal reaction accelerates depolymerization of high-density polyethylene and polypropylene while maintaining energy-dense condensable product yields.
Chemical Recycling of Plastics by Microwave‐Assisted High‐Temperature Pyrolysis
Researchers developed a microwave-assisted high-temperature pyrolysis method that continuously breaks down mixed plastic waste and plant oil into useful chemicals like ethylene and propylene. This chemical recycling approach could help divert plastic waste from the environment while producing renewable building blocks for new materials.
A comprehensive review of recycling and reusing methods for plastic waste focusing Indian scenario
This comprehensive review examines global plastic waste management strategies with a focus on India, covering technologies from mechanical reprocessing and pyrolysis to advanced methods like supercritical water conversion and plasma-assisted processing. Researchers evaluated the scalability, limitations, and environmental trade-offs of each approach, noting persistent challenges with microplastic pollution. The study draws on patents and case studies to highlight practical pathways for improving plastic recycling and reducing environmental contamination.
Polyurethane Foam Waste Upcycling into an Efficient and Low Pollutant Gasification Syngas
Researchers modeled the gasification of polyurethane foam waste under various conditions, finding that optimized thermochemical treatment can convert this common polymer waste into hydrogen-rich syngas with low pollutant output, offering a viable energy recovery pathway for difficult-to-recycle plastic foam materials.
Degradation of polystyrene plastics by alkane monooxygenase and alcohol dehydrogenase
Researchers investigated the ability of alkane monooxygenase and alcohol dehydrogenase enzymes to degrade polystyrene plastics, identifying a microbial enzymatic pathway capable of breaking down this highly persistent polymer that ranks among the six most commercially important plastics worldwide.
КАТАЛІТИЧНИЙ ПІРОЛІЗ ВІДХОДІВ ПОЛІЕТИЛЕНУ ВИСОКОЇ ЩІЛЬНОСТІ: ФАЗОВИЙ РОЗПОДІЛ ПРОДУКТІВ І ХІМІЧНИЙ СКЛАД
This Ukrainian study examined catalytic pyrolysis of high-density polyethylene plastic waste using various catalysts, finding that catalyst choice strongly controls the composition and proportion of gas, liquid, and solid products. The research frames plastic pyrolysis as a strategy to prevent plastic waste from fragmenting into environmental microplastics by converting it into useful fuel products instead. Identifying optimal catalyst conditions is a step toward practical industrial-scale plastic-to-fuel conversion.
Complete degradation of polystyrene microplastics through non-thermal plasma-assisted catalytic oxidation
Researchers developed a two-stage non-thermal plasma system for degrading polystyrene microplastics at low temperatures. Using dielectric barrier discharge plasma coupled with a catalytic oxidation step, they achieved near-complete conversion of polystyrene particles to carbon dioxide within 60 minutes. The study demonstrates a promising technology for breaking down microplastic pollution without requiring high-temperature incineration.
Process Optimization of Solvents Assisted Polyethylene Waste Recycling
Researchers optimized solvent-based chemical recycling of polyethylene plastic waste to recover high-quality recycled material. The study demonstrates that chemical recycling can be tuned to maximize yield and quality, offering a scalable alternative to mechanical recycling that degrades plastic properties over time.