Retrieving back plastic wastes for conversion to value added petrochemicals: opportunities, challenges and outlooks

Kumar, Manish; Bolan, Shiv; Padhye, Lokesh P.; Konarova, Muxina; Foong, Shin Ying; Lam, Su Shiung; Wagland, Stuart T.; Cao, Rong; Li, Yang; Batalha, Nuno; Pandey, Ashok; Siddique, Kadambot H. M.; Wang, Hailong; Rinklebe, Jörg; Bolan, Nanthi

doi:10.1016/j.apenergy.2023.121307

Cited by 26 publications

(5 citation statements)

References 173 publications

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“…Generally, MPs increase the emissions of GHG in the environment, but research has also shown that in soil, MPs may reduce N 2 O emissions (Ren et al 2020). Transforming plastic effectively into fuel also provides hope for mitigating environmental pollution and addressing the energy crisis (Kumar et al 2023;Ye et al 2022). Photocatalysis and microbial degradation technologies have demonstrated prospects at the laboratory scale for converting MPs into water-soluble hydrocarbons, CO 2 , and in limited cases, into useful fuels (Ebrahimbabaie et al 2022).…”

Section: Nexus Between Microplastics Pollution and Climate Changementioning

confidence: 99%

Microplastic pollution as an environmental risk exacerbating the greenhouse effect and climate change: a review

Li,

Du,

Qin

et al. 2024

Carbon Res.

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Microplastics are polymer-based materials with carbon as their main framework. During degradation, they release greenhouse gases such as carbon dioxide and methane. Additionally, environmental microplastics can enter plant tissues, triggering oxidative stress in plant cells, adversely affecting photosynthesis, metabolism, gene expression, and other growth parameters. This reduction in plant efficiency in sequestering and utilizing atmospheric carbon dioxide indirectly impacts global carbon cycling, exacerbating the global greenhouse effect. Furthermore, environmental microplastics significantly alter soil structure and the composition of microbial communities, affecting the emissions of greenhouse gases such as carbon dioxide, methane, and nitrous oxide, thus indirectly promoting greenhouse gas emissions. Increasing research suggests a mutual reinforcement between microplastic pollution and global climate warming, where microplastic pollution exacerbates global climate warming, and the rise in global average temperature leads to the resuspension of microplastics in sediments, intensifying microplastic pollution in the environment. This article primarily focuses on the impacts of environmental microplastic pollution on different ecosystems and the relationship between microplastic pollution and global climate warming. It summarizes the effects of microplastic pollution on greenhouse gas emissions in marine, terrestrial, and atmospheric ecosystems, as well as the mechanisms by which microplastics and climate change affect ecosystem services. By delving into the intricate connection between microplastic pollution and greenhouse gas emissions, this paper aims to raise awareness of the climate change caused by microplastic pollution and calls for further research on the impacts of microplastics on ecosystems and global climate change, with the ultimate goal of protecting ecosystems and human health. Graphical Abstract

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Section: Nexus Between Microplastics Pollution and Climate Changementioning

confidence: 99%

Microplastic pollution as an environmental risk exacerbating the greenhouse effect and climate change: a review

Li,

Du,

Qin

et al. 2024

Carbon Res.

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“…The mass fraction followed the gamma distribution well, which ensures the reasonableness of the data. Distinct from equation (1), C_num in figure 7 refers to the full number of carbon atoms in the molecule.…”

Section: Data Visualization and Analysismentioning

confidence: 99%

“…new challenges [1][2][3]. Molecular-level understanding and interpretations of the complex refining process have received increasing attention, which render molecular management a focus of petrochemical industry development [4].…”

Section: Introductionmentioning

confidence: 99%

MDs-NP: a property prediction model construction procedure for naphtha based on molecular dynamics simulation

Wei,

Qiu

2024

J. Phys.: Condens. Matter

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In the context of carbon neutrality and carbon peaking, molecular management has become a focus of the petrochemical industry. The key to achieving molecular management is molecular reconstruction, which relies on rapid and accurate calculation of oil properties. Focusing on naphtha, we proposed a novel property prediction model construction procedure (MDs-NP) employing molecular dynamics simulations for property collections and gamma distribution from real analytical data for calculating mole fractions of simulation mixtures. We calculated 348 sets of mixture properties data in the range of 273K to 300K by molecular dynamics simulations. Molecular feature extraction was based on molecular descriptors. In addition to descriptors based on open-source toolkits (RDKit and Mordred), we designed 12 naphtha knowledge (NK) descriptors with a focus on naphtha. Three machine learning algorithms (support vector regression, extreme gradient boosting and artificial neural network) were applied and compared to establish models for the prediction of the density and viscosity of naphtha. Mordred and NK descriptors + support vector regression algorithm achieved the best performance for density. The selected RDKFp and NK descriptors + artificial neural network algorithm achieved the best performance for viscosity. Using ablation studies, T, P_w and CC(C)C are three effective descriptors in NK that can improve the performance of the property prediction models. MDs–NP has the potential to be extended to more properties as well as more-complex petroleum systems. The models from MDs–NP can be used for rapid molecular reconstruction to facilitate construction of data-driven models and intelligent transformation of petrochemical processes.

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“…Hydrogenolysis is now applied to plastic waste upcycling with the aid of transition metal catalysts at the laboratory trial stage. Reports showed that hydrogenolysis possesses the potential of redirecting waste postconsumer plastics back to the industry as a new feedstock. − Therefore, if successfully achieved at a commercially viable scale, along with the discovery of the best catalyst system, hydrogenolysis of plastic wastes can be used to achieve a sustainable energy supply and actualization of excellent environmental sanitation.…”

Section: Introductionmentioning

confidence: 99%

Review on Catalytic Depolymerization of Polyolefin Waste by Hydrogenolysis: State-of-the-Art and Outlook

Musa,

Jaseer,

Barman

et al. 2024

Energy Fuels

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Mechanical recycling of plastic waste is not sustainable and inefficient in terms of the resources needed to accomplish the process, and the quality of the materials obtained from this technique is substandard. Chemical recycling of waste polymers appears to be preferable because this technology allows for the production of new materials. This review compiles the most recent research in which selected transition metals are used as catalysts for the hydrogenolytic depolymerization of waste polyolefins as a polymer upcycling process. Hydrogenolysis is an emerging chemical recycling method that uses transition-metal complexes as catalysts in the presence of hydrogen to cleave the C−C bonds of polymer substances into shorter hydrocarbons. Transition metals such as Ruthenium (Ru), Platinum (Pt), Nickel (Ni), Cobalt (Co), Zirconium (Zr), Tantalum (Ta), and Rhodium (Rh) have been utilized most recently for this type of reaction. This hydrogenolysis technique can produce valuable hydrocarbon products, such as gas/liquid fuels and lubricating oils, under relatively milder operational conditions and with less environmental impact. The review focused on the supported metal and organometal catalytic system and their mechanism for the polyolefin hydrogenolysis pathways and detailed investigation of the impact of reaction parameters on the production of high quality fuels such as gasoline, diesel, and light lubricants.

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Retrieving back plastic wastes for conversion to value added petrochemicals: opportunities, challenges and outlooks

Cited by 26 publications

References 173 publications

Microplastic pollution as an environmental risk exacerbating the greenhouse effect and climate change: a review

Microplastic pollution as an environmental risk exacerbating the greenhouse effect and climate change: a review

MDs-NP: a property prediction model construction procedure for naphtha based on molecular dynamics simulation

Review on Catalytic Depolymerization of Polyolefin Waste by Hydrogenolysis: State-of-the-Art and Outlook

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