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20 resultsShowing papers similar to Plastic Waste Valorization: Prospects for Green Hydrogen Production
ClearFeasibility of gasifying mixed plastic waste for hydrogen production and carbon capture and storage
A techno-economic analysis and life cycle assessment of gasifying mixed plastic waste for hydrogen production combined with carbon capture and storage found a minimum hydrogen selling price of US$2.26-2.94 per kg, competitive with fossil fuel hydrogen with carbon capture. The analysis supports plastic waste gasification as both an economically viable and climate-beneficial approach to addressing the plastic waste challenge.
Hydrogen from Waste Gasification
This review examines how gasification technology can convert waste materials, including municipal solid waste, tires, and plastic waste, into hydrogen fuel. Researchers found that hydrogen production potential varies widely depending on the feedstock, ranging from 15 to 300 grams of hydrogen per kilogram of waste. The study highlights gasification as a promising pathway for producing renewable hydrogen, though supportive regulations are needed to bring the technology to market.
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.
Perspectives on Thermochemical Recycling of End-of-Life Plastic Wastes to Alternative Fuels
This review examined thermochemical recycling technologies including pyrolysis, liquefaction, and gasification for converting plastic waste into clean fuels, discussing operating principles, barriers, and the potential for co-processing plastics with biomass.
From Plastic Waste to Green Hydrogen and Valuable Chemicals Using Sunlight and Water
This review examines how solar-powered photoreforming technology can convert plastic waste into valuable chemicals and green hydrogen using sunlight and water. Researchers found that while the approach shows significant promise as an alternative to landfilling, there is currently no standardized way to compare results across different studies. The study proposes guidelines for more consistent evaluation of photocatalyst performance to help advance this technology toward practical application.
Optimization of Renewable Energy Supply Chain for Sustainable Hydrogen Energy Production from Plastic Waste
Researchers developed an optimization model for producing hydrogen energy from plastic waste in Iran using a renewable energy supply chain approach. They found that converting plastic waste into hydrogen fuel through gasification is economically feasible, with costs potentially decreasing over time as the system scales. The study presents a strategy for simultaneously reducing plastic waste volume and generating clean energy.
Microplastic Recovery and Conversion Pathways: The Most Recent Advancements in Technologies for the Generation of Renewable Energy
This review examines current technologies for recovering energy from microplastics, evaluating pyrolysis, gasification, electrochemical methods, and hybrid biomass-based approaches in terms of energy balance, carbon conversion, product composition, process efficiency, and scalability. The authors found pyrolysis to be the most scalable method, producing valuable oils and gases, but highlighted that all reviewed technologies face challenges handling the heterogeneous composition and small particle sizes characteristic of MP feedstocks.
Comprehensive Insights into Photoreforming of Waste Plastics for Hydrogen Production
This review examines photocatalytic "photoreforming" — a solar-powered process that breaks down waste plastics while simultaneously generating hydrogen fuel and useful chemical byproducts. Recent advances in catalyst design, including semiconductor materials and metal-organic frameworks, are analyzed alongside factors like light intensity and pH that affect hydrogen output. This dual-purpose approach could help address both the global plastic waste crisis and the need for clean energy simultaneously.
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.
Reimagining plastics waste as energy solutions: challenges and opportunities
This review examines the potential of converting plastic waste into energy through waste-to-energy and waste-to-fuel technologies, particularly in developing nations where recycling infrastructure is limited. Researchers assessed various conversion methods including pyrolysis and gasification, evaluating their efficiency and environmental trade-offs. The study emphasizes that energy recovery from plastic waste could help address both the growing plastic pollution crisis and energy needs in underserved regions.
Techno-Economic Review of Pyrolysis and Gasification Plants for Thermochemical Recovery of Plastic Waste and Economic Viability Assessment of Small-Scale Implementation
This review evaluates the technical and economic viability of pyrolysis and gasification for converting plastic waste into fuel, finding that small-scale implementation faces significant cost challenges. Converting plastic waste into fuel reduces the amount available to degrade into microplastics in the environment, but economic barriers limit widespread adoption.
Harvesting marine plastic pollutants-derived renewable energy: A comprehensive review on applied energy and sustainable approach.
This review summarized recent research on recovering renewable energy from marine plastic waste through biological, chemical, and thermal conversion processes, evaluating each pathway's carbon efficiency, global warming potential, and economic viability as part of a circular economy approach to plastic pollution.
Recent developments in catalytic materials and reactors for the catalytic pyrolysis of plastic waste into hydrogen: a critical review with a focus on the circular economy
This review examines recent developments in catalytic materials and reactor designs for converting plastic waste into hydrogen through pyrolysis. The study discusses how catalyst-assisted pyrolysis can transform plastic waste into valuable hydrogen fuel, contributing to circular economy goals while addressing the growing plastic pollution problem.
Recent Progress in Polyolefin Plastic: Polyethylene and Polypropylene Transformation and Depolymerization Techniques
This review covers new methods for breaking down polyethylene and polypropylene, the two most common types of plastic, into reusable materials. Since mechanical recycling only handles a small fraction of plastic waste, chemical approaches like pyrolysis and hydrogenolysis offer more promising solutions. These techniques are important because the breakdown of these same plastics into microplastics is a major source of environmental and health contamination.
Plastic regulates its co-pyrolysis process with biomass: Influencing factors, model calculations, and mechanisms
Researchers investigated co-pyrolysis of plastics and biomass, finding that varying the hydrogen-to-carbon ratio of biomass feedstocks influences synergistic effects on bio-oil quality, offering a strategy to improve plastic waste valorization.
Upcycling of waste plastics: strategies, status-quo, and prospects
This review examines strategies for upcycling waste plastics into valuable products as an alternative to landfilling and incineration, which generate microplastics and carbon emissions respectively. Researchers survey chemical recycling methods including pyrolysis, gasification, and catalytic processes that can convert common plastics like PET, polyethylene, and polystyrene into fuels, chemicals, and new materials. The study highlights the urgent need for more effective recycling technologies to address the growing gap between plastic production and waste management capacity.
A State-of-the-Art Review on the Technological Advancements for the Sustainable Management of Plastic Waste in Consort with the Generation of Energy and Value-Added Chemicals
This review examined technological advances for converting plastic waste into energy and value-added chemicals, covering pyrolysis, gasification, and catalytic processes as sustainable alternatives to landfilling, given that global plastic waste generation reached approximately 380 million tonnes in 2022.
Hydrogen production from plastic waste: A comprehensive simulation and machine learning study
Researchers used computer simulations and machine learning to optimize hydrogen production from polystyrene and polypropylene plastic waste through gasification. They found that increasing the gasification temperature up to 900 degrees Celsius significantly boosted hydrogen output, while higher pressures reduced production. The study demonstrates that converting plastic waste into hydrogen fuel could be an efficient way to address both energy needs and plastic pollution.
Recent Advances in Catalytic Chemical Recycling of Polyolefins
This review examines recent scientific advances in catalytic chemical recycling of polyolefins such as polyethylene and polypropylene, which account for nearly 50% of all plastic production by mass. Researchers highlight catalytic processes that can break down polyolefin waste at lower temperatures than pyrolysis, with the goal of upcycling discarded plastics into functional chemicals rather than sending them to landfill.
Chemical recycling of polyolefins: a closed-loop cycle of waste to olefins
This review examines chemical recycling methods that can convert polyolefin plastic waste back into olefins, creating a true closed-loop cycle. Researchers describe how pyrolysis, including thermal, catalytic, and solvent-based approaches, breaks down plastic waste into reusable chemical building blocks. The study suggests that chemical recycling holds significant potential for addressing plastic pollution by turning waste into valuable raw materials rather than sending it to landfills.