Enhancing Recycling of Polyamide 6 and Polyethylene Multilayer Plastics through Sequential Hydrothermal Liquefaction DOI
Juliano Souza dos Passos,

Sofie Klara Gissel Skibsted,

Patrick Biller

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

This study investigates the optimization of hydrothermal liquefaction (HTL) for chemical recycling polyamide 6 (PA6) and polyethylene (PE) multilayer plastic films. A two-step HTL process was employed using subcritical water to selectively depolymerize PA6 into caprolactam, followed by supercritical convert PE hydrocarbons. Experiments on raw yielded up 88 wt % caprolactam under optimized conditions (325 °C, 30 min). In process, recovery from films approached 100%. Supercritical produced oil yields 44–61 PE. The carbon nitrogen balances demonstrated efficient hydrocarbons removal. These results suggest feasibility integrating this existing waste frameworks.

Language: Английский

Synthesis, Modification, and Applications of Poly(vinyl chloride) (PVC) DOI
Ahmed K. Hussein, Emad Yousif,

Malath Khalaf Rasheed

et al.

Polymer-Plastics Technology and Materials, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 40

Published: Nov. 1, 2024

One of the polymers with biggest production volume is poly(vinyl chloride) (PVC) considering their versatility, durability, lightweight, as well low cost production, plastics have recently become an essential part everyone's daily life. However, increased and usage poses significant environmental problems because incomplete utilization, a lengthy biodegradation period, detrimental effects on living things. This study examines latest findings in PVC research, including its properties, polymerization, modification, recycling, diverse applications. It has been proposed that during along application both inorganic organic thermal stabilizers, can mitigate some basic limiting characteristics PVC. chemistry extended by vast continuous study, mainly chemical transformations this polymeric material. describes modification using different materials active modifying agent. The latter included substitutions, modifications, nucleophilic radicals, removal or dehydrochlorination, grafting polymerizations. PVC's consequences are examined, overview functionalization provided article, discussion main reactivity trends lens recycling.

Language: Английский

Citations

6
Dual nature of noncatalytic hydrothermal dechlorination kinetics of PVCs: Insights from thermal dehydrochlorination DOI
Douglas Hungwe,

Satomi Hosokawa,

Hao Xu

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155360 - 155360

Published: Sept. 6, 2024

Language: Английский

Citations

4
Hydrothermal Liquefaction of Sewage Sludge for Circular Bioeconomy: Focus on Lignocellulose Wastes, Microplastics, and Pharmaceuticals DOI Creative Commons
Syed Comail Abbas,

Amna Alam,

Md Manik Mian

et al.

Journal of Bioresources and Bioproducts, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

Citations

0
PVC Dechlorination for Facilitating Plastic Chemical Recycling: A Systematic Literature Review of Technical Advances, Modeling and Assessment DOI Open Access
Yuan Tian,

Mengqi Han,

Dungang Gu

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(19), P. 8331 - 8331

Published: Sept. 25, 2024

Polyvinyl chloride (PVC) resins are widely used in modern society due to their acid and alkali resistance, low cost, strong insulation properties. However, the high chlorine (Cl) content PVC poses significant challenges for its recycling. This study reviews treatment processes, model construction, economic environmental assessments construct a methodological framework sustainable development of emerging dechlorination technologies. In terms this summarizes three types pretreatment, simultaneous during chemical recycling, product purification, emphasizes necessity from systematic perspective. Additionally, construction models processes is investigated laboratory industrial production system macro-scale material, order evaluate potential inventory data material metabolism behaviors. review also summarized methodology Techno-Economic Analysis (TEA) Life Cycle Assessment (LCA), which can be applied evaluation performance processes. Overall, provides readers with comprehensive perspective on state-of-the-art technologies, meanwhile offering guidance future research applications recycling waste.

Language: Английский

Citations

2
Catalytic solvothermal liquefaction of kitchen waste over iron-based catalysts addition and two-step method to produce high-quality fuels DOI

Yu Liu,

Haocheng Wang, Haihua Zhang

et al.

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 314, P. 118688 - 118688

Published: June 15, 2024

Language: Английский

Citations

1
Chemical recycling: comprehensive overview of methods and technologies DOI Creative Commons
Ivanna Harasymchuk, Vladimír Kočí, Monika Vitvarová

et al.

International Journal of Sustainable Engineering, Journal Year: 2024, Volume and Issue: 17(1), P. 124 - 148

Published: Oct. 28, 2024

Plastic pollution has emerged as a global environmental crisis, prompting the search for innovative solutions to manage and repurpose plastic waste sustainably. Chemical recycling garnered attention promising strategy address this challenge by converting discarded plastics into valuable feedstocks products. Drawing upon statistical data thorough review of literature, paper examines diverse methodologies technologies employed in chemical recycling, highlighting key advancements their potential economic impacts. The aim article is provide comprehensive overview various methods plastics. In article, reader offered detailed processing methods, including hydrolysis, glycolysis, enzymatic degradation, acid supercritical fluid depolymerisation, catalytic pyrolysis, fast microwave fluidised bed plasma gasification, steam oxidative hydrothermal liquefaction, biological electrochemical processing. literature cited allows gain an in-depth understanding processes at Technology Readiness Levels (TRL) 4 TRL 9, depending on chosen technology.

Language: Английский

Citations

1
Beyond the Landfill: A critical review of techniques for End-of-Life Polyvinyl chloride (PVC) valorization DOI Creative Commons
Mohammadhossein Havaei, Oğuzhan Akin, Andrea Locaspi

et al.

Waste Management, Journal Year: 2024, Volume and Issue: 193, P. 105 - 134

Published: Dec. 9, 2024

Polyvinyl chloride (PVC) is a polymer comprised of more than 50% chlorine that offers unmatched versatility at low expense. PVC irreplaceable in several applications, such as construction materials, medical and cables. This tunable properties come the cost complex formulations for product challenging end-of-life (EoL) options waste. Pure collected sorted already recycled successfully to some extent, yet, when ends up mixed plastic waste stream, it can be detrimental recycling process. its effects various concentrations remain focal point both scholars policymakers. In this review, narrative begins naissance continues investigate EoL valorization products are inevitably discarded. Strategies technical legal challenges regarding each method discussed, focusing on European market. An effective solution handle requires combination policies schemes proper collection sorting specific streams considering all available technologies select right tools. review support appropriate selection suitable methods

Language: Английский

Citations

1
Co-hydrothermal carbonization of polyvinyl chloride and rice straw for solid fuel production: Investigation into effect of solid to water ratio using Box-Behnken design and response surface methodology DOI
Hao Xu, Yang Pu,

Mengzhu Yu

et al.

Applied Energy, Journal Year: 2024, Volume and Issue: 380, P. 125089 - 125089

Published: Dec. 6, 2024

Language: Английский

Citations

0
Enhancing Recycling of Polyamide 6 and Polyethylene Multilayer Plastics through Sequential Hydrothermal Liquefaction DOI
Juliano Souza dos Passos,

Sofie Klara Gissel Skibsted,

Patrick Biller

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

This study investigates the optimization of hydrothermal liquefaction (HTL) for chemical recycling polyamide 6 (PA6) and polyethylene (PE) multilayer plastic films. A two-step HTL process was employed using subcritical water to selectively depolymerize PA6 into caprolactam, followed by supercritical convert PE hydrocarbons. Experiments on raw yielded up 88 wt % caprolactam under optimized conditions (325 °C, 30 min). In process, recovery from films approached 100%. Supercritical produced oil yields 44–61 PE. The carbon nitrogen balances demonstrated efficient hydrocarbons removal. These results suggest feasibility integrating this existing waste frameworks.

Language: Английский

Citations

0