High-yield H2 production from polypropylene through pyrolysis-catalytic reforming over activated carbon based nickel catalyst

zhang, Yuyuan; Shan, Rui; Gu, Jing; Huhe, Taoli; Ling, Xiang; Yuan, Haoran; Chen, Yong

doi:10.1016/j.jclepro.2022.131566

Cited by 37 publications

(4 citation statements)

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“…The obtained H 2 yield was higher than the values (25.14 mol/kg PP ) reported in previous literature, [18] in which the PP underwent pyrolysis and in‐line catalytic decomposition at 500–800 °C. Nevertheless, the H 2 yield was also lower than that from pyrolysis‐catalytic reforming of PP at 500–900 °C [65] . Thus, the proposed strategy in this study needs to be further optimized via reactor design and the development of efficient catalysts.…”

Section: Resultsmentioning

confidence: 92%

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Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Su,

Xu,

et al. 2023

ChemSusChem

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Plastic waste is a promising and abundant resource for H2 production. However, upcycling plastic waste into H2 fuel via conventional thermochemical routes requires relatively considerable energy input and severe reaction conditions, particularly for polyolefin waste. Here, we report a tandem strategy for the selective upcycling of polypropylene (PP) waste into H2 fuel in a mild and clean manner. PP waste was first oxidized into small‐molecule organic acids using pure O2 as oxidant at 190 °C, followed by the catalytic reforming of oxidation aqueous products over ZnO–modified Ru/NiAl2O4 catalysts to produce H2 at 300 °C. A high H2 yield of 44.5 mol/kgPP and a H2 mole fraction of 60.5% were obtained from this tandem process. The entire process operated with almost no solid residue remaining and equipment contamination, ensuring relative stability and clean of the reaction system. This strategy provides a new route for low‐temperature transforming PP and improving the sustainability of plastic waste disposal processes.

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Section: Resultsmentioning

confidence: 92%

“…Nevertheless, the H 2 yield was also lower than that from pyrolysis-catalytic reforming of PP at 500-900 °C. [65] Thus, the proposed strategy in this study needs to be further optimized via reactor design and the development of efficient catalysts.…”

Section: Tandem Conversion Of Real-world Pp Wastes To Hmentioning

confidence: 99%

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Su,

Xu,

et al. 2023

ChemSusChem

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“…However, the plastic pyrolysis technology also has some limitations of carbon dioxide and waste oil product during pyrolysis process. Currently, to increase the hydrogen fuels, various modified-techniques have been used such as pyrolysis-steam reforming, 100 pyrolysis-CO 2 dry reforming, 101 pyrolysis-plasma catalytic processing. 102,103…”

Section: Hydrogen Productionsmentioning

confidence: 99%

The current status of hydrogen energy: an overview

Le,

Trung,

Nguyen

et al. 2023

RSC Adv.

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“…Especially, bimetallic NiFe with a higher Fe/Ni ratio shows a better performance to facilitate the formation of high-quality CNTs. , Apart from the active transition metals, the catalyst support is also important in improving the catalyst performance. Al 2 O 3 , silica–alumina materials, MgO, and activated carbon have been chosen for study previously. Generally, supports with a high surface area can lead to fine dispersion of active metals.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Activity of the Fe₂O₃/Al₂O₃ Catalyst for Hydrogen Production through Pyrolysis-Catalytic Decomposition of Plastics

Xue

Lin

et al. 2023

ACS Sustainable Chem. Eng.

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Plastic recycling through thermochemical conversion for the production of fuels and chemicals is a promising way for simultaneous waste processing and utilization. In the current study, high-density polyethylene (HDPE) was subjected to pyrolysis and then catalytic upgrading to produce hydrogen in the presence of a novel Fe2O3/Al2O3 catalyst with a grain boundary. To understand the catalyst–support interaction as well as the resulting synergistic catalytic effects, catalytic pyrolysis of HDPE with supported Fe2O3/Al2O3 was compared with those over Fe2O3, Al2O3, and a cascade combination of both. It was found that the performance of Fe2O3/Al2O3 was superior to that of other catalysts in terms of chain cracking and C–C/C–H bond cleavage. The hydrogen yield with Fe2O3/Al2O3 was 50.53 mmol·gplastic –1, equivalent to more than 70% of hydrogen in plastic. Besides, alkanes/alkenes ranging from C2 to C9 dominated the hydrocarbon products. The analysis of the cycle performance revealed that the reduction pathway of Fe2O3/Al2O3 was different from those of other Fe2O3-containing catalysts, which was also confirmed by temperature-programmed reduction. To investigate the essential role and reaction mechanism with Fe2O3/Al2O3, characterizations of Fe2O3/Al2O3 before and after the reaction were conducted. The grain boundary between Fe2O3 and Al2O3 enhanced the adsorption of gaseous products. More importantly, the catalyst–support interaction to form FeAl2O4 during the pyrolysis reaction, determined by X-ray photoelectron spectroscopy, was responsible for effective proton adsorption and C–H bond cleavage. This study provides an insightful understanding of catalyst transformation during plastic catalytic pyrolysis for hydrogen production.

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High-yield H2 production from polypropylene through pyrolysis-catalytic reforming over activated carbon based nickel catalyst

Cited by 37 publications

References 50 publications

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

The current status of hydrogen energy: an overview

Synergistic Activity of the Fe₂O₃/Al₂O₃ Catalyst for Hydrogen Production through Pyrolysis-Catalytic Decomposition of Plastics

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High-yield H2 production from polypropylene through pyrolysis-catalytic reforming over activated carbon based nickel catalyst

Cited by 37 publications

References 50 publications

Low‐Temperature Upcycling of Polypropylene Waste into H2 Fuel via a Novel Tandem Hydrothermal Process

Low‐Temperature Upcycling of Polypropylene Waste into H2 Fuel via a Novel Tandem Hydrothermal Process

The current status of hydrogen energy: an overview

Synergistic Activity of the Fe2O3/Al2O3 Catalyst for Hydrogen Production through Pyrolysis-Catalytic Decomposition of Plastics

Contact Info

Product

Resources

About

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Synergistic Activity of the Fe₂O₃/Al₂O₃ Catalyst for Hydrogen Production through Pyrolysis-Catalytic Decomposition of Plastics