Fabrication and evaluation of the Mn-promoted Ni/FeAl2O4 catalysts in the thermocatalytic decomposition of methane: Impact of various promoters

Kazemi, Saba; Alavi, Seyed Mehdi; Rezaei, Mehran; Akbari, Esmaeil

doi:10.1016/j.fuel.2023.127797

Cited by 18 publications

(4 citation statements)

References 60 publications

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“…This support material had a relatively large surface area and could improve the metal dispersion. 20 For surface area, all Fe catalysts synthesized in this study had mesoporous sizes with pore diameters spanning a range of 2−50 nm and a type IV pattern (Figure S3). The Al−Fe displayed the largest BET surface area, measuring 52.463 m 2 g −1 .…”

Section: Results Andmentioning

confidence: 97%

“…This was because the addition of Al metals formed iron aluminate (FeAl 2 O 4 ), which could act as the catalyst support of Fe and Ni. This support material had a relatively large surface area and could improve the metal dispersion . For surface area, all Fe catalysts synthesized in this study had mesoporous sizes with pore diameters spanning a range of 2–50 nm and a type IV pattern (Figure S3).…”

Section: Results and Discussionmentioning

confidence: 99%

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Product Selection Toward High-Value Hydrogen and Bamboo-Shaped Carbon Nanotubes from Plastic Waste by Catalytic Microwave Processing

Li,

Chen,

Lin

et al. 2024

Environ. Sci. Technol.

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The escalating levels of plastic waste and energy crises underscore the urgent need for effective waste-to-energy strategies. This study focused on converting polypropylene wastes into high-value products employing various iron-based catalysts and microwave radiative thermal processing. The Al−Fe catalysts exhibited exceptional performance, achieving a hydrogen utilization efficiency of 97.65% and a yield of 44.07 mmol/g PP. The gas yields increased from 19.99 to 94.21 wt % compared to noncatalytic experiments. Furthermore, this catalytic system produced high-value bamboo-shaped carbon nanotubes that were absent in other catalysts. The mechanism analysis on catalytic properties and product yields highlighted the significance of oxygen vacancies in selecting high-value products through two adsorption pathways. Moreover, the investigation examined the variations in product distribution mechanisms between conventional and microwave pyrolysis, in which microwave conditions resulted in 4 times higher hydrogen yields. The technoeconomic assessment and Monte Carlo risk analysis further compared the disparity. The microwave technique had a remarkable internal rate of return (IRR) of 39%, leading to an income of $577/t of plastic with a short payback period of 2.5 years. This research offered sustainable solutions for the plastic crisis, validating the potential applicability of commercializing the research outcomes in real-world scenarios.

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Section: Results Andmentioning

confidence: 97%

Section: Results and Discussionmentioning

confidence: 99%

Product Selection Toward High-Value Hydrogen and Bamboo-Shaped Carbon Nanotubes from Plastic Waste by Catalytic Microwave Processing

Li,

Chen,

Lin

et al. 2024

Environ. Sci. Technol.

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“…The influence of the addition of various transition metals (Cu, Cr, Co, Zn, and Mn) on the properties and efficiency of the NiO(50)/FeAl 2 O 4 catalyst was investigated in a micro fixed-ed reactor [177]. The Mn-based catalyst was the most effective among others in terms of catalytic activity and stability, with production of high-purity hydrogen and nanostructured carbon particles, at a temperature of 700 • C with CH 4 conversion of 62.3%.…”

Section: Thermo-catalytic Decompositionmentioning

confidence: 99%

New Perspectives on Catalytic Hydrogen Production by the Reforming, Partial Oxidation and Decomposition of Methane and Biogas

Boscherini,

Storione,

Minelli

et al. 2023

Energies

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The article provides a short review on catalyst-based processes for the production of hydrogen starting from methane, both of fossil origin and from sustainable processes. The three main paths of steam- and dry-reforming, partial oxidation and thermo-catalytic decomposition are briefly introduced and compared, above all with reference to the latest publications available and to new catalysts which obey the criteria of lower environmental impact and minimize the content of critical raw materials. The novel strategies based on chemical looping with CO2 utilization, membrane separation, electrical-assisted (plasma and microwave) processes, multistage reactors and catalyst patterning are also illustrated as the most promising perspective for CH4 reforming, especially on small and medium scale. Although these strategies should only be considered at a limited level of technological readiness, research on these topics, including catalyst development and process optimization, represents the crucial challenge for the scientific community.

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“…Thermocatalytic methane decomposition allows the production of pure H 2 without any CO x impurities and solid carbon with high potentials. This reaction (CH 4 ⟶ C ðsÞ + 2H 2ðgÞ ; ΔH 298 = 74:8 kJ/mol) is endothermic, so the increase of reaction temperature leads to enhancement in the amount of produced hydrogen [14][15][16]. Although methane is the most inactive hydrocarbon and its decomposition requires temperatures higher than 1473 K, but with using suitable catalysts, this temperature can be significantly decreased [17,18].…”

Section: Introductionmentioning

confidence: 99%

Production of Pure Hydrogen through Thermocatalytic Methane Decomposition Using NiO-MgO Catalysts Promoted by Chromium and Copper Prepared via Mechanochemical Method

Pourdelan,

Alavi,

Rezaei

et al. 2023

International Journal of Energy Research

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The burning of fossil fuels enhanced the greenhouse gas emissions in the atmosphere and caused serious environmental problems; so, it is necessary to find a replacement energy source. Hydrogen is considered one of the clean and viable energy carriers. Thermocatalytic methane decomposition (TMD) allows the production of COx-free H2 and solid carbon with excellent attributes and high potential. In this study, 50NiO-MgO (50 wt.% NiO and 50 wt.% MgO) and Cu- and Cr-doped samples were synthesized via the mechanochemical route. Structural characteristics of the fresh and spent catalysts were analyzed by different analysis methods. The results demonstrated that the specific surface area improved by introducing chromium to the catalyst formulation. Between all of the samples, the 50NiO-MgO-15Cr2O3 (50 wt.% NiO, 35 wt.% MgO, and 15 wt.% Cr2O3) showed the higher BET surface area with an amount of 38.3 m2/g. The performance of 50NiO-MgO and Cr- and Cu-doped catalysts was tested in the thermocatalytic methane decomposition. The obtained result showed that the Cr-doped sample possessed higher methane conversion with the amount of 65% at 575°C and much better lifetime due to its positive impact on the reducibility of the catalyst. Also, the influence of GHSV (gas hourly space velocity) was investigated on the catalytic performance of this sample which was chosen as the optimum catalyst.

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Fabrication and evaluation of the Mn-promoted Ni/FeAl2O4 catalysts in the thermocatalytic decomposition of methane: Impact of various promoters

Cited by 18 publications

References 60 publications

Product Selection Toward High-Value Hydrogen and Bamboo-Shaped Carbon Nanotubes from Plastic Waste by Catalytic Microwave Processing

Product Selection Toward High-Value Hydrogen and Bamboo-Shaped Carbon Nanotubes from Plastic Waste by Catalytic Microwave Processing

New Perspectives on Catalytic Hydrogen Production by the Reforming, Partial Oxidation and Decomposition of Methane and Biogas

Production of Pure Hydrogen through Thermocatalytic Methane Decomposition Using NiO-MgO Catalysts Promoted by Chromium and Copper Prepared via Mechanochemical Method

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