Synthesis of Clean Hydrogen Gas from Waste Plastic at Zero Net Cost

Wyss, Kevin M.; Silva, Karla J.; Bets, Ksenia V.; Algozeeb, Wala A.; Kittrell, Carter; Teng, Carolyn H.; Choi, Chi Hun; Chen, Weiyin; Beckham, Jacob L.; Yakobson, Boris I.; Tour, James M.

doi:10.1002/adma.202306763

Cited by 17 publications

(6 citation statements)

References 48 publications

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“…Meanwhile, new technologies may offer a pathway to the creation of products of added value. For instance, Wyss et al (2023) demonstrated how plastic waste can be converted into clean H 2 along with high purity graphene. This idea and technique could be applied to EOL fishing gear, as Eimontas et al (2023) indicated its suitability as a feedstock for additional higher added value energy product generation.…”

Section: Opportunities To Promote a Circular Economymentioning

confidence: 99%

The potential contribution of end-of-life fishing nets, lines and ropes to a circular economy: the Namibian perspective

Erasmus,

Johannes,

Amutenya

et al. 2024

Front. Sustain.

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Using data collected through survey questionnaires with fleet managers of 16 (61.5%) Namibian fishing companies, we explored the current practices, challenges, and opportunities in promoting Circular Economy (CE) in the context of End-Of-Life (EOL) fishing gear. Most fishing companies (56.2%) have been in operation for more than 25 years. A majority of fishing companies (62.5%) are involved in demersal trawling, mostly targeting hake (Merluccius species). Survey findings reveal that the companies import fishing gear mostly in a semi – complete format (50.0%). The current durability of fishing nets and lines/ropes is about 3 and 2 years respectively, highlighting a continuous generation of fishing gear waste. We estimated (that) approximately 104 tons of EOL fishing gear, lines/twine and ropes (are) generated annually by the Namibian fishing industry, however about 10% of some parts of the EOL fishing gear are recovered and reused. None of the fishing companies recycle EOL fishing gear, which is mostly attributed to a lack of recycling facilities. Current standard practices of EOL fishing nets, lines and ropes management include selling to employees, donating to other institutions, or disposal at dumping sites. Although some of the EOL fishing nets, lines and ropes are sold at open markets, they are not converted into value-added products, thus they are not fully utilized to significantly contribute to the CE. We recommend the implementation of circular practices such as converting EOL fishing nets, lines and ropes into value-added products such as clothing, shoes, and accessories, i.e., sunglasses, thereby reducing environmental pollution, minimising energy usage, and promoting sustainable production and consumption.

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Section: Opportunities To Promote a Circular Economymentioning

confidence: 99%

The potential contribution of end-of-life fishing nets, lines and ropes to a circular economy: the Namibian perspective

Erasmus,

Johannes,

Amutenya

et al. 2024

Front. Sustain.

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“…Furthermore, in the case of gasification and steam reforming, the feedstock can be transformed into a gas with a high hydrogen content. Finally, we can cite the processes intended to produce hydrogen and carbon materials from plastics, as in the case of microwave-assisted catalytic pyrolysis [29] or flash Joule heating [30]. In this section, the main chemical treatment processes will be presented, with a focus on pyrolysis.…”

Section: Alternative Plastic Waste Treatment Processesmentioning

confidence: 99%

“…With this technique, they succeeded in extracting 97% of the hydrogen content of plastics. In another study, Wyss et al [30] applied an FJH process to produce hydrogen and graphene from different types of plastics, with hydrogen extraction efficiencies exceeding 80%.…”

Section: Combined Carbonaceous Materials and Hydrogen-production-orie...mentioning

confidence: 99%

An Overview of the Non-Energetic Valorization Possibilities of Plastic Waste via Thermochemical Processes

Moussa,

Awad,

Krawczak

et al. 2024

Materials

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The recovery and recycling/upcycling of plastics and polymer-based materials is needed in order to reduce plastic waste accumulated over decades. Mechanical recycling processes have made a great contribution to the circularity of plastic materials, contributing to 99% of recycled thermoplastics. Challenges facing this family of processes limit its outreach to 30% of plastic waste. Complementary pathways are needed to increase recycling rates. Chemical processes have the advantage of decomposing plastics into a variety of hydrocarbons that can cover a wide range of applications, such as monomers, lubricants, phase change materials, solvents, BTX (benzene, toluene, xylene), etc. The aim of the present work is to shed light on different chemical recycling pathways, with a special focus on thermochemicals. The study will cover the effects of feedstock, operating conditions, and processes used on the final products. Then, it will attempt to correlate these final products to some petrochemical feedstock being used today on a large scale.

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“…However, the resulting pyrolysis oil and gas face several issues, including poor quality and high costs associated with separation and purification. These issues limit the widespread commercial application of these pyrolysis products [ 33 ]. Stable and high-value carbon materials can be produced through the co-pyrolysis of waste plastics and biomass materials, making it a promising strategy.…”

Section: Introductionmentioning

confidence: 99%

Recent Progresses in Pyrolysis of Plastic Packaging Wastes and Biomass Materials for Conversion of High-Value Carbons: A Review

Cheng,

Wang,

Fang

et al. 2024

Polymers

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The recycling of plastic packaging wastes helps to alleviate the problems of white pollution and resource shortage. It is very necessary to develop high-value conversion technologies for plastic packaging wastes. To our knowledge, carbon materials with excellent properties have been widely used in energy storage, adsorption, water treatment, aerospace and functional packaging, and so on. Waste plastic packaging and biomass materials are excellent precursor materials of carbon materials due to their rich sources and high carbon content. Thus, the conversion from waste plastic packaging and biomass materials to carbon materials attracts much attention. However, closely related reviews are lacking up to now. In this work, the pyrolysis routes of the pyrolysis of plastic packaging wastes and biomass materials for conversion to high-value carbons and the influence factors were analyzed. Additionally, the applications of these obtained carbons were summarized. Furthermore, the limitations of the current pyrolysis technology are put forward and the research prospects are forecasted. Therefore, this review can provide a useful reference and guide for the research on the pyrolysis of plastic packaging wastes and biomass materials and the conversion to high-value carbon.

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Synthesis of Clean Hydrogen Gas from Waste Plastic at Zero Net Cost

Cited by 17 publications

References 48 publications

The potential contribution of end-of-life fishing nets, lines and ropes to a circular economy: the Namibian perspective

The potential contribution of end-of-life fishing nets, lines and ropes to a circular economy: the Namibian perspective

An Overview of the Non-Energetic Valorization Possibilities of Plastic Waste via Thermochemical Processes

Recent Progresses in Pyrolysis of Plastic Packaging Wastes and Biomass Materials for Conversion of High-Value Carbons: A Review

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