Effect of nanosilicon carbide on the carbonisation process of coal tar pitch

Mikociak, D.; Magiera, Anna; Łabojko, Grzegorz; Błażewicz, S.

doi:10.1016/j.jaap.2014.03.001

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…e DSC profile of parent CTP is characterized by a small endothermic peak at about 60°C, two exothermic peaks close together at about 530°C, and a big exothermic peak at 640°C. e peak at about 60°C, which is not accompanied by weight loss, indicates the state of CTP transformed from brittle to viscoelasticity [24]. e three exothermic peaks at about 530°C and 640°C, which are associated with weight loss during the heat treatment process, are corresponding to the reactions of thermal polymerization taken place at these temperatures [24].…”

Section: Resultsmentioning

confidence: 99%

Pyrolysis and Morphology Behavior of EDTA-Na2Mg•4H2O and Coal Tar Pitch and Its Application for Porous Carbon

Zhang

Song

Tian

2021

Journal of Spectroscopy

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Coal tar pitch (CTP) is a quite promising candidate for the production of porous carbons. Traditionally, the porous carbons are prepared by the heat treatment of carbon precursors in the presence of template and activator. In this paper, EDTA-Na2Mg•4H2O and CTP were mixed to produce porous carbons in the absence of template and activator, which were generated in situ by the heat treatment of EDTA-Na2Mg•4H2O. The pyrolysis and morphology behavior of the mixture of EDTA-Na2Mg•4H2O and coal tar pitch (EDTA-Na2Mg•4H2O@CTP) were studied by thermogravimetry and differential scanning calorimetry, Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The characteristics of the obtained porous carbons were characterized by N2 adsorption-desorption isotherm. The results show that EDTA-Na2Mg•4H2O has a great influence on the pyrolysis and morphology of CTP. The pyrolysis behavior of CTP becomes complicated after the addition of EDTA-Na2Mg•4H2O for the physical and chemical changes of EDTA-Na2Mg•4H2O during the heat treatment. EDTA-Na2Mg•4H2O@CTP dehydrates at 160°C and decomposes Na2CO3 and MgO at 600°C. The surface morphology of EDTA-Na2Mg•4H2O@CTP changes with the EDTA-Na2Mg•4H2O content and heat treatment temperature. After acid washing of the product of EDTA-Na2Mg•4H2O@CTP heat-treated at 700°C, the obtained porous carbon material consists of micropores and mesopores. Its specific surface area is 574.18 m2 g−1 and the average pore width is 4.53 nm.

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Section: Resultsmentioning

confidence: 99%

Pyrolysis and Morphology Behavior of EDTA-Na2Mg•4H2O and Coal Tar Pitch and Its Application for Porous Carbon

Zhang

Song

Tian

2021

Journal of Spectroscopy

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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].…”

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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“…Carbon black (CB) is a cheap carbon nanoparticle, which has the ability to enhance coking yield of carbon precursors (Zhang et al 2012 ; Menendez et al 1996 ). Nano-sized particles of SiC added to some types of CTP facilitate the conversion of carbon precursors into a well-ordered graphite structure (Mikociak et al 2014 ). The influence of carbides as catalysts for the graphitisation process has been reported in several works (Ōya and Marsh 1982 ; Takenaka et al 2008 ; Charon et al 2014 ; Zhou et al 2011 ; Kaarik et al 2008 ; Ordas et al 2014 ; Yi et al 2008 ).…”

Section: Introductionmentioning

confidence: 99%

De-agglomeration and homogenisation of nanoparticles in coal tar pitch-based carbon materials

et al. 2016

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The aim of the work was to characterise coal tar pitch (CTP) modified with selected nanoparticles as a binder precursor for the manufacture of synthetic carbon materials. Different factors influencing the preliminary preparative steps in the preparation of homogenous nanoparticle/CTP composition were studied. Graphene flakes, carbon black and nano-sized silicon carbide were used to modify CTP. Prior to introducing them into liquid CTP, nanoparticles were subjected to sonication. Various dispersants were used to prepare the suspensions, i.e. water, ethanol, dimethylformamide (DMF) and N-methylpyrrolidone (NMP).The results showed that proper dispersant selection is one of the most important factors influencing the de-agglomeration process of nanoparticles. DMF and NMP were found to be effective dispersants for the preparation of homogenous nanoparticle-containing suspensions. The presence of SiC and carbon black nanoparticles in the liquid pitch during heat treatment up to 2000 °C leads to the inhibition of crystallite growth in carbon residue.

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Effect of nanosilicon carbide on the carbonisation process of coal tar pitch

Cited by 13 publications

References 23 publications

Pyrolysis and Morphology Behavior of EDTA-Na2Mg•4H2O and Coal Tar Pitch and Its Application for Porous Carbon

Pyrolysis and Morphology Behavior of EDTA-Na2Mg•4H2O and Coal Tar Pitch and Its Application for Porous Carbon

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

De-agglomeration and homogenisation of nanoparticles in coal tar pitch-based carbon materials

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