Enhancement of mesocarbon microbead (MCMB) preparation through supercritical fluid extraction and fractionation

Zhang, Dekai; Zhang, Linzhou; Fang, Xieling; Xu, Zheng; Sun, Xuewen; Zhao, Suoqi

doi:10.1016/j.fuel.2018.10.054

Cited by 27 publications

(9 citation statements)

References 54 publications

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“…Therefore, MCMB can be widely applied to various fields, such as high-performance liquid chromatography column materials, high-specific surface area activated carbon materials, high-efficiency lithium ion battery anodes, high-density and high-strength graphite materials, etc. [5,21].…”

Section: Carbonaceous Mesophase-based Mesocarbon Microbeadsmentioning

confidence: 99%

Preparation, Characterization, and Applications of Carbonaceous Mesophase: A Review

Yuan¹,

Cui²

2020

Liquid Crystals and Display Technology

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Carbonaceous mesophase with a nematic liquid crystal structure possesses an easily graphitizable characteristic and can be used as a promising raw material to prepare anisotropic carbon and graphite materials with high performance and multifunction. Therefore, the carbonaceous mesophase occupies a pivotal and irreplaceable position in many frontier and cutting-edge fields. The controllable preparation and characterization of carbonaceous mesophase derived from a model molecule (i.e., naphthalene) are presented, especially the formation, development, and transformation of anisotropic liquid crystalline mesophase in the synthetic naphthalene pitch during the process of liquid-phase carbonization (350-450°C). The increasing applications of naphthalene-based carbonaceous mesophase as an ideal precursor material for fabricating representative advanced carbon materials with high added value (e.g., mesophase pitch-derived coke, mesocarbon microbeads, mesophase pitch-based carbon foam, high-modulus mesophase pitch-based carbon fibers, and high-thermal-conductivity carbon-based composites, etc.) are reviewed in detail in this chapter.

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Section: Carbonaceous Mesophase-based Mesocarbon Microbeadsmentioning

confidence: 99%

Preparation, Characterization, and Applications of Carbonaceous Mesophase: A Review

Yuan¹,

Cui²

2020

Liquid Crystals and Display Technology

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“…Generally, MCMBs are prepared by the thermal polycondensation of aromatic compounds, including coal tar pitch, petroleum pitch, heavy oil, anthracene oil, naphthalene, and biomass tar [ 10 , 11 , 12 , 13 , 14 ]. What is more, some researchers also report using a supercritical fluid extraction method and suspension method to prepare MCMBs with mesophase pitch as raw materials [ 15 ]. So far, a thermal polycondensation method is a common, economical, and friendly way to produce MCMBs.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Mesocarbon Microbeads by the Co-Polycondensation of High-Temperature Coal Tar Pitch and Coal Pyrolytic Extracts

et al. 2022

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Mesocarbon microbeads (MCMBs) are a kind of engineering and functional artificial carbon materials generally prepared by the polymerization of polycyclic aromatic hydrocarbons. The physicochemical property of the raw materials plays a key role in the quality of MCMBs. For a detailed analysis of the synergistic effects of the generation of MCMBs, a high-temperature coal tar pitch was used as raw materials, and coal pyrolytic extracts were used as additive to synthesize the MCMBs. The microstructure and morphology of the derived MCMBs were determined by an optical microscope, scanning electron microscope, X-ray diffraction, Raman spectrum, and laser particle size analyzer. In fact, the addition of the coal pyrolytic extracts can adjust the molecular structure of the blending pitch, and the coal pyrolytic extracts can promote the generation of the MCMBs during the co-polycondensation process. The MCMBs obtained by co-polycondensation method have a good degree of sphericity, lower defects in the surface morphology, and a lower charge transfer resistance (Rct) of 4.677 Ω.

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“…TI, however, form earlier than the QI. Thus, the TI are an extensively studied coking precursor. − Currently, Soxhlet extraction − and centrifugal separation are both widely used traditional methods to measure the yields of TI in the oil products. However, it was found that the repeatability of the above methods is poor when the yield of TI is less than 1%.…”

Section: Introductionmentioning

confidence: 99%

New Visual Test Method for the Toluene Insolubles in Oil Products

et al. 2019

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Toluene insolubles (TI) are recognized as coking precursors produced at the initial stage of a thermal reaction. The traditional methods can only give the overall yield of TI; however, more detailed information, such as the size distribution and the shape parameters of TI, cannot be provided. In the present work, a new visual test method for the TI in oil products was developed based on the digital microscopic image processing technology and the statistical method. This method can give the overall yields of TI and provide the particle size distribution and the shape parameters. The optimized test conditions were determined by investigating the influencing factors. The calibration results of this method showed that the relative error of volume concentration is 5% and the overall error of particle size distribution is less than 5%. Moreover, the detectable concentration of this method is much lower than that of the traditional methods.

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Enhancement of mesocarbon microbead (MCMB) preparation through supercritical fluid extraction and fractionation

Cited by 27 publications

References 54 publications

Preparation, Characterization, and Applications of Carbonaceous Mesophase: A Review

Preparation, Characterization, and Applications of Carbonaceous Mesophase: A Review

Preparation and Characterization of Mesocarbon Microbeads by the Co-Polycondensation of High-Temperature Coal Tar Pitch and Coal Pyrolytic Extracts

New Visual Test Method for the Toluene Insolubles in Oil Products

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