Carbon nanotubes of polyethylene

Kukovitskii, E. F.; Чернозатонский, Л. А.; L’vov, S.G.; Mel’nik, N. N.

doi:10.1016/s0009-2614(97)00020-1

Cited by 85 publications

(46 citation statements)

References 14 publications

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“…CNT production from plastics has been demonstrated [27][28][29][30][31][32][33][34][35][36][37][38], however the effect of the steam injection rate on CNT and hydrogen has not been considered. The potential to produce CNTs from the pyrolysis of plastics was demonstrated by Kukovitsky et al [27].…”

Section: Introductionmentioning

confidence: 99%

“…The potential to produce CNTs from the pyrolysis of plastics was demonstrated by Kukovitsky et al [27]. Generating CNTs from waste plastics holds the benefit of simultaneously dealing with waste management problems, and also providing a cheap and abundant feedstock for CNT production.…”

Section: Introductionmentioning

confidence: 99%

“…This means it increases the economic benefit of plastics gasification which was originally only used for hydrogen production. Whilst many studies have considered PE and PP feedstocks for CNT production [27,32,37,38], other plastics such as PS have received less attention. The suitability of the different plastic samples for CNT production will be examined using LDPE, PP and PS.…”

Section: Introductionmentioning

confidence: 99%

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Control of steam input to the pyrolysis-gasification of waste plastics for improved production of hydrogen or carbon nanotubes

Acomb

2014

Applied Catalysis B: Environmental

159

102

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Carbon nanotubes (CNTs) have been proven to be possible as high-value by-products of hydrogen production from gasification of waste plastics. In this work, steam content in the gasification process was investigated to increase the quality of CNTs in terms of purity.Three different plastics -low density polyethylene (LDPE), polypropylene (PP) and polystyrene (PS) were studied in a two stage pyrolysis-gasification reactor. Plastics samples were pyrolysed in nitrogen at 600°C, before the evolved gases were passed to a second stage where steam was injected and the gases were reformed at 800°C in the presence of a nickelalumina catalyst. To investigate the effect that steam plays on CNT production, steam injection rates of 0, 0.25, 1.90 and 4.74 g h -1 were employed. The CNTs produced from all three plastics were multiwalled CNTs with diameters between 10 and 20 nm and several microns in length. For all the plastic samples, raising the steam injection rate led to increased hydrogen production as steam reforming and gasification of deposited carbon increased. High quality CNTs, as observed from TEM, TPO and Raman spectroscopy, were produced by controlling the steam injection rate. The largest yield for LDPE was obtained at 0 g h -1 steam injection rate, whilst PP and PS gave their largest yields at 0.25 g h -1 . Overall the largest CNT yield was obtained for PS at 0.25 g h -1 , with a conversion rate of plastic to CNTs of 32% wt.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Control of steam input to the pyrolysis-gasification of waste plastics for improved production of hydrogen or carbon nanotubes

Acomb

2014

Applied Catalysis B: Environmental

159

102

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“…There are several reports on the preparation and characterization of carbon nanotubes on metallic substrates [21][22][23]. There are also reports on the discovery of carbon nanowires formed on nickel substrates by Fujita et al [24], and formation of graphite layers during carbon nanotubes growth on Fe-Ni alloy film by Baek et al [25].…”

Section: Introductionmentioning

confidence: 99%

“…There are also reports on the discovery of carbon nanowires formed on nickel substrates by Fujita et al [24], and formation of graphite layers during carbon nanotubes growth on Fe-Ni alloy film by Baek et al [25]. However, either two-step growth process [23] or extreme deposition conditions such as high pressure [21,22]were required in the processes of nanotube growth. Here we report a simple method to directly grow carbon nanotubes on nickel substrate under normal pressure.…”

Section: Introductionmentioning

confidence: 99%

CVD growth of carbon nanotubes directly on nickel substrate

Pan

2005

Materials Letters

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Chemical vapor deposition (CVD) growth of carbon nanotubes directly on nickel substrates was carried out at different temperatures. Effects of temperature on the growth of carbon nanotubes were investigated and the nucleation and growth mechanism of carbon nanotubes at different temperature ranges were also discussed. Based on the growth mechanism of nanotubes, small amount of Fe nanoparticles were deposited on the nickel substrate to introduce more nucleation sites at elevated temperature, and the density of nanotubes on the surface of the substrate was greatly improved.

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