Investigation of the effect of catalyst type, concentration, and growth time on carbon nanotube morphology and structure

Gergeroglu, Hazal; Ebeoğlugil, M. Faruk

doi:10.1007/s42823-022-00381-3

Cited by 8 publications

(2 citation statements)

References 81 publications

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“…Of these, Ni- [15], Co- [16], and Fe- [17] based catalysts have been widely studied owing to their excellent catalytic activity and stability with lower prices compared to those of other precious metals [18]. The catalytic activity of Ni, Co, and Fe, which are transition metals, originates from their unfilled 3d orbitals, which can partially accept electrons to promote the dissociation of hydrocarbon molecules [19,20]. However, because metal catalysts without supports cannot be completely activated due to sintering and agglomeration, much research has been conducted on using supports to increase catalytic activity.…”

Section: Ch4 → 2h2 + C(s)mentioning

confidence: 99%

Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

Seong,

Kang,

Lee

et al. 2024

Preprint

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Catalytic decomposition of methane (CDM) is an environmentally friendly technique to produce hydrogen and nano-carbon materials without greenhouse gas emissions. To compare the catalytic activity and hydrogen productivity of various active metals in the CDM reaction, experiments were performed by synthesizing Fe–Al, Co–Al, and Ni–Al catalysts through the co-precipitation method. According to the hydrogen production calculation for each catalyst, the Ni-based catalyst exhibited the best hydrogen production at a reaction temperature of 600 ℃. It could be attributed to the influence of the strong metal–support interaction on the catalytic activity. Based on the Ni–Al catalyst, which showed better hydrogen production than the other active metals, the activity and hydrogen production of the CDM process were analyzed according to different process factors. 90 L/gcat of hydrogen was produced through the optimization of process factors such as reduction temperature, reduction time, spatial velocity, methane flow, and gas addition.

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Section: Ch4 → 2h2 + C(s)mentioning

confidence: 99%

Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

Seong,

Kang,

Lee

et al. 2024

Preprint

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“…There is insufficient interaction between CNTs within the assembly owing to various defects, including CNT length, purity, and other factors [117,118]. Research on CNT synthesis has been actively conducted to address these issues since the discovery of CNTs [119][120][121][122][123]. The CNT fibers are manufactured using dry and wet spinning methods.…”

Section: Carbon Nanotube Fibermentioning

confidence: 99%

A review of high-performance carbon nanotube-based carbon fibers

Lee,

Heo,

Kim

et al. 2023

Funct. Compos. Struct.

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With the growing importnace of high-performance carbon fibers (CFs), researches have been conducted in many applications such as aerospace, automobile and battery. Commercilalized carbon fibers have been manufactured with thermal treatment of organic precursor fibers including polyacrylonitrile (PAN), pitch and cellulose. Since conventional carbon fibers display either high tensile strength or high modulus properties due to structural limitations, it has been a chalenge to develop carbon fibers with both tensile strength and modulus. Therefore, various studies have been conducted to obtain high-performance carbon fiber. Among them, 1-dimensional carbon nanotubes (CNTs) have been used the most commonly because of high mechanical and conducting properties. In this review, the recent development of carbon nanotube fibers and carbon nanotube-based composite carbon fibers is introduced. The those fibers showed both high strength and high modulus with high conducting properties.

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Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

Seong,

Kang,

Lee

et al. 2024

Res Chem Intermed

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Investigation of the effect of catalyst type, concentration, and growth time on carbon nanotube morphology and structure

Cited by 8 publications

References 81 publications

Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

A review of high-performance carbon nanotube-based carbon fibers

Effect of active metals and process factors on the catalytic decomposition of methane for hydrogen production

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