Ni-doped Carbon Nanofilaments (Ni-CNF): Preparation and Use as Reforming Catalyst

Abatzoglou, Nicolas; Plascencia, C. Reyes

doi:10.11159/ijtan.2015.004

Cited by 2 publications

(3 citation statements)

References 33 publications

(34 reference statements)

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“…On a 17-g steel strip with dimensions of 413 mm × 25 mm × 0.5 mm, some 0.3 g/min of liquid C 2 H 5 OH was reacted with CO 2 at a flow rate of 160 SCCM (or 2.67 × 10 −6 Nm 3 .s −1 ) at room temperature and barometric pressure (25 °C, 1 atm), and the reaction was left to proceed for about 4−6 h. 27 The resulting CNFs, deposited as C according to eq 8, were harvested and then functionalized by acid-activation using dilute 4 M HNO 3 where 250 mL of 68% (15.8 M) concentrated acid was dissolved in a liter of solution using distilled H 2 O. About 50 g of the CNFs were refluxed with 4 M HNO 3 at 95 °C for 3 h. 28…”

Section: Experimental Methodsmentioning

confidence: 99%

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Synthesis and Characterization of Co/C and Fe/C Nanocatalysts for Fischer–Tropsch Synthesis: A Comparative Study Using a Fixed-Bed Reactor

Aluha

Boahene

Dalai

et al. 2015

Ind. Eng. Chem. Res.

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Production of Fischer–Tropsch catalysts is challenging because it involves controlling and optimizing multiple parameters in numerous technical steps. Here, we present C-supported nanometric Fe and Co catalysts synthesized by plasma spraying, a method that contracts catalyst production into a single step, in contrast to traditional multistep catalyst production by precipitation or impregnation. The catalysts were reduced in situ and then tested for Fischer–Tropsch synthesis in a gas–solid fixed-bed reactor at 230 °C and 30-bar pressure for 24 h. The performance of plasma-synthesized catalysts was superior at a gas hourly space velocity of 6,000 mL·g cat –1·h–1, with Fe/C catalysts showing about 30% CO conversion per pass while Co/C catalysts yielded about 20% CO conversion. Identical C-supported Co and Fe catalysts prepared by impregnation or precipitation gave CO conversions of about 7% under similar reaction conditions.

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Section: Experimental Methodsmentioning

confidence: 99%

“…The resulting CNFs, deposited as C according to , were harvested and then functionalized by acid-activation using dilute 4 M HNO 3 where 250 mL of 68% (15.8 M) concentrated acid was dissolved in a liter of solution using distilled H 2 O. About 50 g of the CNFs were refluxed with 4 M HNO 3 at 95 °C for 3 h …”

Section: Experimental Methodsmentioning

confidence: 99%

Synthesis and Characterization of Co/C and Fe/C Nanocatalysts for Fischer–Tropsch Synthesis: A Comparative Study Using a Fixed-Bed Reactor

Aluha

Boahene

Dalai

et al. 2015

Ind. Eng. Chem. Res.

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“…Different conditions (contact time, acid concentration, and temperature) were prescreened to ascertain appropriate acid treatment. Nitric acid concentration of 10 M with contact time of 5 h was chosen after optimization based on already-reported work on those nanofilaments by Abatzoglou et al 26 In these conditions, CNF were not broken or degraded, and most of the metal added in the following step was attached to them. However, the effect of acid treatment temperature has to be understood.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanofilaments Functionalized with Iron Oxide Nanoparticles for in-Depth Hydrogen Sulfide Adsorption

Fauteux‐Lefebvre

Abatzoglou

Braidy

et al. 2015

Ind. Eng. Chem. Res.

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The purification of hydrogen prior of its use in various applications, such as fuel cells, is of paramount importance. Although there are many commercial ways to obtain hydrogen sulfide, the need to reach very low concentration values, at the ppm or even at the ppb level, is the main motivation behind this work. This work examines the production and utilization of a new, low H 2 S breakthrough and high capacity adsorbent, made of iron nanoparticles embedded in carbon nanofilaments. It is produced by a 2-step functionalization methodology: acid pretreatment and iron wet impregnation. This novel adsorbent was characterized by scanning transmission electron microscope, X-ray absorption near edge structure, Brunauer Emmet and Teller calculations, and thermogravimetric analysis, and the adsorption efficiency was measured for different iron-loadings, temperatures, and H 2 S breakthrough values. Operating conditions and metal-loading that allow a decrease of H 2 S concentration from 500 ppm to below 1.5 ppm are reported. It has also been found that acid treatment influences metal dispersion and, due to the nanometric nature of adsorbents, the process is not controlled by mass diffusion phenomena.

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Ni-doped Carbon Nanofilaments (Ni-CNF): Preparation and Use as Reforming Catalyst

Abstract: -

Cited by 2 publications

References 33 publications

Synthesis and Characterization of Co/C and Fe/C Nanocatalysts for Fischer–Tropsch Synthesis: A Comparative Study Using a Fixed-Bed Reactor

Synthesis and Characterization of Co/C and Fe/C Nanocatalysts for Fischer–Tropsch Synthesis: A Comparative Study Using a Fixed-Bed Reactor

Carbon Nanofilaments Functionalized with Iron Oxide Nanoparticles for in-Depth Hydrogen Sulfide Adsorption

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