Mo/MgO as an efficient catalyst for methane decomposition into COx-free hydrogen and multi-walled carbon nanotubes

2021 ◽  
pp. 106023
Author(s):  
Ahmed E. Awadallah ◽  
M.A. Deyab ◽  
Hanan A. Ahmed
Keyword(s):  
Carbon Nanotubes ◽  
Methane Decomposition ◽  
Efficient Catalyst ◽  
Free Hydrogen ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Catalytic synthesis of carbon nanotubes from the decomposition of methane over a Ni–Co/La2O3 catalyst

2009 ◽  
Vol 87 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Long Chen ◽  
Haitao Liu ◽  
Keli Yang ◽  
Jiankang Wang ◽  
Xiaolai Wang
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Single Step ◽  
Methane Decomposition ◽  
Gravimetric Analysis ◽  
Catalyst Composition ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The production of multi-walled carbon nanotubes (MWNTs) by the catalytic chemical vapour deposition (CCVD) method was examined over a series of Ni–Co/La2O3 catalysts with methane as the carbon source. The catalyst composition and the reaction conditions were optimized by analyzing the effluent gas with gas chromatography. Various techniques, such as X-ray diffraction (XRD), Transmission electron microscopy (TEM), Raman spectra, and Thermal gravimetric analysis (TGA) were used to characterize the catalysts and products. The results indicate that the unreduced catalyst 30Ni–10Co/La2O3 showed the highest activity for methane decomposition, and the highest carbon yield, being 624.2%, was obtained over this catalyst at 700 °C after 60 min of reaction with hydrogen as carrier gas. TGA results suggest that the purity of carbon nanotubes (CNTs) can reach up to 98 wt% after a single-step purification by hydrochloric acid.Key words: carbon nanotubes, catalytic chemical vapour deposition, methane decomposition, Ni–Co/La2O3 catalyst.

Effect of Ball-Milling Parameter on the Synthesis of MWCNT/Alumina Hybrid Compound

2012 ◽  
Vol 620 ◽  
pp. 309-313 ◽  
Author(s):  
Norlin Nosbi ◽  
Md Akil Hazizan
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Particle Size Analysis ◽  
Methane Decomposition ◽  
Decomposition Process ◽  
Size Analysis ◽  
Hybrid Compound ◽  
X Ray ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The effects of ball-milling parameter on the structures and properties of the synthesis of multi-walled carbon nanotubes (MWCNT)/alumina hybrid compound via methane decomposition process using Ni-Alumina catalyst were researched. The structural evaluation of particles compound was investigated by particle size analysis, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), FTIR spectrometer and scanning electron microscopy (SEM). The results indicated that with 300rpm 15h, the microstructure of the hybrid compound is greatly refined, and methane decomposition process distributed uniformly, thus increasing the efficiency of the carbon nanotubes growth process.

Multi-walled Carbon Nanotubes Penetrate into Plant Cells and Affect the Growth of Onobrychis arenaria Seedlings

Acta Naturae ◽  
2011 ◽  
Vol 3 (1) ◽  
pp. 99-106 ◽  
Author(s):  
E A Smirnova ◽  
A A Gusev ◽  
O N Zaitseva ◽  
E M Lazareva ◽  
G E Onishchenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Plant Cells ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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