Mechanism of microwave-assisted iron-based catalyst pyrolysis of discarded COVID-19 masks

Yuwen, Chao; Liu, Bingguo; Qiu, Rong; Hou, Keren; Zhang, Libo; Guo, Shenghui

doi:10.1016/j.wasman.2022.10.041

Cited by 14 publications

(3 citation statements)

References 40 publications

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“…Yuwen et al. [44] produced a series of FeAlOx catalysts through hydrogen reduction at different temperatures. These catalysts were used to produce CNTs from disposable medical masks through microwave pyrolysis at ±400 °C.…”

Section: Resultsmentioning

confidence: 99%

“…This biochar was used as a feedstock to produce CNTs through microwave pyrolysis in the presence of a ferrocene catalyst under mild temperatures. Yuwen et al [44] produced a series of FeAlOx catalysts through hydrogen reduction at different temperatures. These catalysts were used to produce CNTs from disposable medical masks through microwave pyrolysis at ±400 °C.…”

Section: Comparison Of Pyrolysis Temperaturementioning

confidence: 99%

See 1 more Smart Citation

Microwave‐Driven Pyrolysis of Plastic Waste into Carbon Nanotubes and Hydrogen Using Spinel Ferrites

Shoukat,

Naz,

Yaseen

et al. 2024

Chem Eng & Technol

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In this study, NiFe2O4, ZnFe2O4, and MgFe2O4 catalysts are utilized to decompose plastic into hydrogen gas, liquids, and carbon nanotubes. Ferrite nanoparticles worked as a catalyst and heat susceptors for microwaves. MgFe2O4 catalyst resulted in highly structured carbon residue with fewer impurities than other catalysts. The oil yield of 13.5, 14, and 9.5 wt. % was obtained with NiFe2O4, ZnFe2O4, and MgFe2O4, respectively. Similarly, gas evolution was about 14, 13, and 12.5 wt. %, respectively. MgFe2O4 displayed superior H2 production efficiency of 90 % compared to the other two catalysts. These findings suggest high activity of MgFe2O4 catalyst compared to NiFe2O4 and ZnFe2O4 catalysts. This catalyst also showed stronger magnetic characteristics and reactivity.

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Section: Resultsmentioning

confidence: 99%

Section: Comparison Of Pyrolysis Temperaturementioning

confidence: 99%

Microwave‐Driven Pyrolysis of Plastic Waste into Carbon Nanotubes and Hydrogen Using Spinel Ferrites

Shoukat,

Naz,

Yaseen

et al. 2024

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…Bimetallic catalysts have been attracting researchers' attention, possessing higher development potential due to the synergistic effect. One can use carbon nanotubes to provide the reaction surface and pore structure, while the other active component can act as inhibiting coke formations [89]; moreover, the synergistic effect can also attribute to the electron transfer between both active components [90,91]. For example, iron-cobalt was used to investigate their synergistic effect.…”

Section: Metal-based Catalystmentioning

confidence: 99%

A Review on the Microwave-Assisted Pyrolysis of Waste Plastics

Yang

Shang

et al. 2023

Processes

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The exhaustion of fossil energy and the severe pollution induced by using plastics has forced people to embark on the road to sustainable development. The high value of the recycling of plastics has become an important part of energy conservation. Microwave treatment, owning specific interactions between the electric field and the molecules of treated materials, presents potential advantages in the application of plastic pyrolysis. Therefore, the research status of the microwave-assisted pyrolysis (MAP) of plastics to produce high-value-added liquid oil, gas, and solid carbon was reviewed in this paper. The effects of plastic properties, microwave treatment parameters, microwave absorbers, co-pyrolysis, catalysts, and reactor devices on the process and the products were analyzed. It is essential to optimize the experimental design by studying microwave-assisted co-pyrolysis technology and the application of catalysts, understanding the mechanism of co-pyrolysis to improve product selectivity. At the same time, the continuous MAP device for large-scale plastics treatment still needs to be developed. In addition, developing a large-scale simulation computing research platform for screening catalysts, optimizing processes, and commercial production is required to make the process more efficient.

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Preliminary strategy and product analysis of microwave pyrolysis of waste printed circuit board

Liu,

Li,

Shu

et al. 2024

Can J Chem Eng

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In this study, microwave pyrolysis of waste printed circuit boards (WPCBs) was carried out in an inert atmosphere, and the effects of pyrolysis temperature and nitrogen flow rate on the yield and composition of pyrolysis products were investigated. With the increase of pyrolysis temperature, the yield of liquid product increases gradually, and the yield of solid product decreases gradually. At 600°C, the yield of each phase tends to be stable. When the temperature continues to rise, the content of H2 and CO decreases, and the content of C6 ~ C9 in the liquid product decreases. Microwave heating promotes the pyrolysis of brominated epoxy resin, which helps to improve the recovery rate of valuable substances and reduce the environmental impact of waste treatment. This study demonstrates that the microwave pyrolysis of WPCBs in nitrogen atmosphere has great potential in the green recovery process.

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Mechanism of microwave-assisted iron-based catalyst pyrolysis of discarded COVID-19 masks

Cited by 14 publications

References 40 publications

Microwave‐Driven Pyrolysis of Plastic Waste into Carbon Nanotubes and Hydrogen Using Spinel Ferrites

Microwave‐Driven Pyrolysis of Plastic Waste into Carbon Nanotubes and Hydrogen Using Spinel Ferrites

A Review on the Microwave-Assisted Pyrolysis of Waste Plastics

Preliminary strategy and product analysis of microwave pyrolysis of waste printed circuit board

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