Thermal conversion of coal-tar pitch in the presence of silicon compounds

Ефимова, О. С.; Khokhlova, G. P.; Patrakov, Yu. F.

doi:10.3103/s0361521910010027

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…The MS curve of carbores P is shown in Figure 7 (a). It could be concluded that the CH 4 , H 2 O, CO, and H 2 gas corresponding to the m/z = 16, m/z = 18, m/z = 28, and m/z = 2, respectively, were generated at 558°C ( Efimova et al, 2010 ; Hotová and Slovák, 2016 ), which was same as the TG-DTA curve. Interestingly, the local magnification of H 2 showed that the H 2 was produced at 700°C–900°C.…”

Section: Resultsmentioning

confidence: 62%

Mechanism of carbon nanotube growth in expanded graphite via catalytic pyrolysis reaction using carbores P as a carbon source

Wang,

Zhang,

Chen

et al. 2023

Front. Chem.

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Carbon nanotubes (CNTs) had potential applications in energy conversion and storage devices, and it could be prepared by expanded graphite loaded with catalyst at high temperature, however, the mechanism of carbon nanotube growth in expanded graphite need further confirmation. In this work, carbon nanotubes’ in situ growth in expanded graphite (EG) were prepared via catalytic pyrolysis reaction using carbores P as a carbon source and Co(NO3)3•6H2O as a catalyst. The results of X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDS) indicated the carbon nanotubes could generate in, EG with the presence of carbores P as a carbon source and cobalt nitrate as a catalyst. More interestingly, the growth mechanism of carbon nanotubes could be concluded by the results of differential thermal analysis-thermogravimetry-mass spectrometry (DTA-TG-MS) and X-ray photoelectron spectroscopy (XPS) analysis. The pyrolysis products of carbores P were mainly hydrocarbon gas such as CH4 gas, which reacts with Co(NO3)3·6H2O catalyst to reduces CoOx to Co particles, then the carbon form pyrolysis was deposited the on the surface catalyst Co particles and, after continuous solid dissolution and precipitation, carbon nanotubes were at last generated in EG at last.

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Section: Resultsmentioning

confidence: 62%

Mechanism of carbon nanotube growth in expanded graphite via catalytic pyrolysis reaction using carbores P as a carbon source

Wang,

Zhang,

Chen

et al. 2023

Front. Chem.

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“…Nano-Si-derived additives including nSiC can act as graphitization catalysts [16][17][18]. Conversion of silicon component into carbide phase in the presence of CTP-based carbon may occur already at 1300 ∘ C [19,20]. The presence of SiC phase in carbon matrix may lead to a change in the mechanism of the graphitization process.…”

Section: Introductionmentioning

confidence: 99%

Study of the Carbonization and Graphitization of Coal Tar Pitch Modified with SiC Nanoparticles

Gubernat

Lis

Tomala

et al. 2017

Journal of Nanomaterials

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Silicon carbide nanoparticles (nSiC) have been used to modify coal tar pitch (CTP) as a carbon binder. The influence of ceramic nanoparticles on the structure and microstructure was studied. The structure of CTP-based carbon residue with various nSiC contents was analyzed by using SEM with EDAX, Raman spectroscopy, and X-ray diffraction. The effect of ceramic nanofiller on the crystallite sizes (Lc, La) and the c-axis spacing (d002) in carbonized samples after heating from 1000 to 2800°C was analyzed. Ceramic nanofillers inhibit structural changes in carbonized samples heated to 1000°C. After heating CTP with nSiC above 2000°C, the carbon samples contained two carbon components differing in structural ordering. Ceramic nanoparticles increase carbon crystallite growth, while their impact on the c-axis spacing is low.

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Investigation on the performance and detoxification of modified low temperature coal tar pitch

Sun

Liu

2017

Front. Struct. Civ. Eng.

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Thermal conversion of coal-tar pitch in the presence of silicon compounds

Cited by 8 publications

References 4 publications

Mechanism of carbon nanotube growth in expanded graphite via catalytic pyrolysis reaction using carbores P as a carbon source

Mechanism of carbon nanotube growth in expanded graphite via catalytic pyrolysis reaction using carbores P as a carbon source

Study of the Carbonization and Graphitization of Coal Tar Pitch Modified with SiC Nanoparticles

Investigation on the performance and detoxification of modified low temperature coal tar pitch

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