The quantitative assessment of coke morphology based on the Raman spectroscopic characterization of serial petroleum cokes

Chen, Kun; Zhang, Haoran; Ibrahim, Ummul-Khairi; Xue, WangYang; He, Liu; Guo, Aijun

doi:10.1016/j.fuel.2019.02.096

Cited by 61 publications

(17 citation statements)

References 46 publications

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“…S6a †), indicating that coke develops a higher degree of structural order. 44 In addition, the evolution of the D/G band height ratio with time on stream in Fig. S6b † proves that structural changes are notable at TOS < 4 h, with little variations at longer reaction times, reaching an almost constant composition.…”

Section: Coke Characterizationmentioning

confidence: 73%

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Hita

Cordero-Lanzac

Bonura

et al. 2020

Sustainable Energy Fuels

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Section: Coke Characterizationmentioning

confidence: 73%

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Hita

Cordero-Lanzac

Bonura

et al. 2020

Sustainable Energy Fuels

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“…The (100) peak represents the size of an aromatic carbon sheet. A higher peak corresponds to a higher condensation degree of aromatic nuclei [ 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

A comprehensive investigation of the reaction behaviorial features of coke with different CRIs in the simulated cohesive zone of a blast furnace

Tian

Zhou

et al. 2021

PLoS ONE

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The reaction characteristics and mechanism of coke with different coke reactivity indices (CRIs) in the high-temperature zone of a blast furnace should be fully understood to correctly evaluate the coke quality and optimize ironmaking. In this work, low-CRI coke (coke A) and high-CRI coke (coke B) were charged into a thermogravimetric analyzer to separately study their microstructural changes, gasification characteristics, and reaction mechanism under simulated cohesive zone conditions in a blast furnace. The results show that both coke A and coke B underwent pyrolysis, polycondensation, and graphitization during the heat treatment. The pyrolysis, polycondensation, gasification speed, and dissolution speed rates of coke B were higher than those of coke A. Direct and indirect reduction between sinter and coke occurred in the cohesive zone and had different stages. The consumption rate of coke B was faster than that of coke A during the coke–sinter reduction. The carbon molecules of coke A must absorb more energy to break away from the skeleton than those of coke B.

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“…As reported in the references, 25 carbon microcrystalline transformation characteristics of needle coke at low temperature can provide important information to predict the graphitization ability at high temperature. Some related reports suggested that the X‐ray diffraction and Raman spectrum combined with curve‐fitted method was the valuable way to obtain detailed information of carbon microcrystalline in carbonaceous materials 26–32 . In addition, the scanning electron microscope (SEM) and transmission electron microscope (TEM) were also the key methods to observe the microstructure of carbon materials 33–35 …”

Section: Introductionmentioning

confidence: 99%

Transformation of microstructure of coal‐based and petroleum‐based needle coke: Effects of calcination temperature

Zhu

et al. 2021

Asia-Pacific J Chem Eng

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Needle coke was recognized as one of the most important precursor to produce ultra‐high power graphite electrode, commercial anode materials for lithium‐ion battery, and special graphite materials. It was generally accepted that the microstructure of needle coke has been acted as a key role on the quality of its derived graphite materials. In this work, four kinds of green needle cokes (coal‐based green needle coke and petroleum‐based green needle coke) have been used as the raw materials to investigate the changes of micro‐structure during the calcination process. The micro‐structure of needle cokes at different calcination temperature has been detailed characterized by X‐ray diffraction (XRD), Raman spectrum, scanning electron microscope (SEM), and transmission electron microscopy (TEM), respectively. Briefly, the size of carbon crystalline (Lc), the content of graphite carbon (IG/IAll), and the content of regular carbon microcrystals (Ig) in coal‐based needle coke were higher than petroleum‐based needle coke when the calcinations temperature was below 1500°C. What's more, the calcinations temperature of 1400°C is the characteristic temperature of the transition of carbon microcrystalline. In other words, the coal‐based needle coke was easier to graphitization than petroleum‐based needle coke.

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The quantitative assessment of coke morphology based on the Raman spectroscopic characterization of serial petroleum cokes

Cited by 61 publications

References 46 publications

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

Dynamics of carbon formation during the catalytic hydrodeoxygenation of raw bio-oil

A comprehensive investigation of the reaction behaviorial features of coke with different CRIs in the simulated cohesive zone of a blast furnace

Transformation of microstructure of coal‐based and petroleum‐based needle coke: Effects of calcination temperature

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