Modified characteristics of mesophase pitch prepared from coal tar pitch by adding waste polystyrene

Cheng, Xuewu; Zha, Qingfang; Li, Xuejun; Yang, Xiaoguang

doi:10.1016/j.fuproc.2008.07.003

Cited by 74 publications

(41 citation statements)

References 25 publications

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“…Corresponding to the degree of crystallinity, porosity, and apparent density, Franklin [2] categorized carbon into graphitizing and non-graphitizing. The structures, properties, and applications of graphitizing carbons, such as mesophase pitch (MP) [3,4], petroleum coke [5][6][7], coal pitch coke [8][9][10], etc., have been extensively studied. The apparent densities and pores of typical non-graphitizing carbons (e.g., some carbons derived from thermosetting resin, named as glassy carbons) have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Structural changes in four different precursors with heat treatment at high temperature and resin carbon structural model

et al. 2012

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Four precursors (mesophase pitch, condensed polynuclear aromatic resin, polyimide resin, and thermosetting phenolic resin) were heat treated at temperatures from 900 to 3000°C. These products were characterized by X-ray diffraction, transmission electron microscopy, and helium adsorption density instruments. Heterogeneous graphitization was observed above 2200°C in the resin carbons. Various constituents (amorphous, turbostratic, and graphitic) coexisted and transformed from being disordered to ordered with increasing treatment temperature. The molecular structures of the starting materials played important roles in the proportions of various constituents, crystallite sizes, and preferred orientation of the graphitic constituent of the different carbons during high temperature treatment. High-resolution transmission electron microscopy images showed that the structural features of Jenkins' and Shiraishi's model all existed in three resin carbons. Based on these results, we think that their structures are not belong to Jenkins' model, also do not belong to Shiraishi's model, are a complex of above two models.

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Section: Introductionmentioning

confidence: 99%

Structural changes in four different precursors with heat treatment at high temperature and resin carbon structural model

et al. 2012

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“…This ratio is related to the structure of the pitch components. CTP is widely used to prepare carbon materials due to its relatively low cost, availability and high carbon yield (CY) [4]. Due to the chemical complexity of the pitch, detailed characterization is essential to assess possible applications [5].…”

Section: Introductionmentioning

confidence: 99%

Mesophase Microspheres From Distillation and Thermal Treatment of Coal Tar

Martínez-Flores¹,

Camporredondo-Saucedo²,

Moreno-C³

et al. 2017

ChChT

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Abstract. 1 We have investigated the formation of mesophase carbon microbeads in tar pitch generated by the coal coking in a steelmaking plant. Pitches were obtained at different distillation temperatures (643, 673 and 723 K). The distilled samples were then thermally treated in nitrogen atmosphere either at 723 K for 8 h (T1) for at 703 K for 4 h (T2). A new phase appears, seen in optical microscopy with a polarizing filter. Samples subjected to the T1 thermal treatment were found to form a discontinuous fluid phase distinct from the main phase. Formation of mesophase carbon microbeads is seen also in samples subjected to the T2 treatment, with the particle diameters from 30 to 60 µm. The microbeads can be used as precursors for the synthesis of graphitic materials.

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“…Thus, this study has explored modification issues. Previous studies have shown that the structure of char can be improved by adding polymers such as polystyrene [10] and PVC [11], divinylbenzene monomers [12], or benzaldehyde [13]. For the modification reactions of CTP, catalysts are required.…”

Section: Introductionmentioning

confidence: 99%

Autocatalytic modification of coal tar pitch using benzoyl chloride and its effect on the structure of char

Cao

Guo

Dong

et al. 2015

Fuel Processing Technology

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Modified characteristics of mesophase pitch prepared from coal tar pitch by adding waste polystyrene

Cited by 74 publications

References 25 publications

Structural changes in four different precursors with heat treatment at high temperature and resin carbon structural model

Structural changes in four different precursors with heat treatment at high temperature and resin carbon structural model

Mesophase Microspheres From Distillation and Thermal Treatment of Coal Tar

Autocatalytic modification of coal tar pitch using benzoyl chloride and its effect on the structure of char

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