Mesocarbon Microbead Production from Fluid Catalytic Cracking Slurry Oil: Improving Performance through Supercritical Fluid Extraction

Zhang, Dekai; Zhang, Linzhou; Yu, Ying; Zhang, Liang; Xu, Zheng; Sun, Xuewen; Zhao, Suoqi

doi:10.1021/acs.energyfuels.8b03498

Cited by 14 publications

(3 citation statements)

References 60 publications

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“…On the other hand, Figure 7d shows that at WFA content of 3%, substantial accumulation of impurities occurs on the pyrolysis product surface and the main component of impurities at this time is quinoline insoluble substances, leading to a significant impact on the layered structure. Finally, in Figure 7e, it is evident that when the WFA content reaches 5%, the pyrolysis product surface is nearly entirely covered by impurities, resulting in the almost complete disappearance or coverage of the layered structure [49][50][51][52].…”

Section: Morphology and Structure Of Final Co-carbonization Products ...mentioning

confidence: 96%

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Wang,

Li,

Wang

et al. 2024

Molecules

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This study investigates the synthesis of mesophase pitch using low-cost fluid catalytic cracking (FCC) slurry and waste fluid asphaltene (WFA) as raw materials through the co-carbonization method. The resulting mesophase pitch product and its formation mechanism were thoroughly analyzed. Various characterization techniques, including polarizing microscopy, softening point measurement, Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA), were employed to characterize and analyze the properties and structure of the mesophase pitch. The experimental results demonstrate that the optimal optical texture of the mesophase product is achieved under specific reaction conditions, including a temperature of 420 °C, pressure of 1 MPa, reaction time of 6 h, and the addition of 2% asphaltene. It was observed that a small amount of asphaltene contributes to the formation of mesophase pitch spheres, facilitating the development of the mesophase. However, excessive content of asphaltene may cover the surface of the mesophase spheres, impeding the contact between them and consequently compromising the optical texture of the mesophase pitch product. Furthermore, the inclusion of asphaltene promotes polymerization reactions in the system, leading to an increase in the average molecular weight of the mesophase pitch. Notably, when the amount of asphaltene added is 2%, the mesophase pitch demonstrates the lowest ID/IG value, indicating superior molecular orientation and larger graphite-like microcrystals. Additionally, researchers found that at this asphaltene concentration, the mesophase pitch exhibits the highest degree of order, as evidenced by the maximum diffraction angle (2θ) and stacking height (Lc) values, and the minimum d002 value. Moreover, the addition of asphaltene enhances the yield and aromaticity of the mesophase pitch and significantly improves the thermal stability of the resulting product.

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Section: Morphology and Structure Of Final Co-carbonization Products ...mentioning

confidence: 96%

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Wang,

Li,

Wang

et al. 2024

Molecules

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“…The effect of FCC slurry on the synthesis of mesophase pitch is not only affected by the preparation process, but also by some basic factors on the formation of the products. The effects of raw materials, [94][95][96] temperature, [97][98][99] pressure, 100,101 reaction time, 80,102 system environment 103,104 and stirring rate [105][106][107] on the formation of mesophase pitch in the reaction system are reviewed below.…”

Section: Impact Factors For the Formation Of Mesophase Pitchmentioning

confidence: 99%

Research progress in the preparation of mesophase pitch from fluid catalytic cracking slurry

Yang

Chen

et al. 2023

RSC Adv.

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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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Mesocarbon Microbead Production from Fluid Catalytic Cracking Slurry Oil: Improving Performance through Supercritical Fluid Extraction

Cited by 14 publications

References 60 publications

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Research progress in the preparation of mesophase pitch from fluid catalytic cracking slurry

New Visual Test Method for the Toluene Insolubles in Oil Products

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