Orientation behavior of carbonaceous mesophase spherules having a new molecular arrangement in a magnetic field

Imamura, Takeshi; Yamada, Yoshio; Oi, Shoichi; Honda, Hidemasa

doi:10.1016/0008-6223(78)90096-9

Cited by 27 publications

(6 citation statements)

References 3 publications

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“…2. It should be noted that alternative spherule structures have been observed in which the molecular layers lie parallel to the pitch interface; e.g., these onion-like structures have been reported PYROLYSIS TEMPERATURE (°C) in the pyrolysis of synthetic pitches prepared from anthracene or naphthalene [13], from coal-tar pitch treated with carbon black [14], and from decacyclene [75]. This characteristic "Brooks-Taylor morphology" has been identified in spherules as small as a few microns; the spherules seldom grow beyond 50 μτη without developing more complex internal structures.…”

Section: Isotropic Liquid • Discotic Nematic Liquid Crystal > Solidifmentioning

confidence: 99%

Disclination Structures in the Carbonaceous Mesophase

Zimmer

White

1982

Advances in Liquid Crystals

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Section: Isotropic Liquid • Discotic Nematic Liquid Crystal > Solidifmentioning

confidence: 99%

Disclination Structures in the Carbonaceous Mesophase

Zimmer

White

1982

Advances in Liquid Crystals

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“…Polarized microscopy is a direct and clear tool for MCMB and mesophase pitch texture analysis . On the basis of SEM results, we chose optimal reaction conditions for each SFEO, and the relevant products were subjected to polarized analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Polarized microscopy is a direct and clear tool for MCMB and mesophase pitch texture analysis. 50 On the basis of SEM results, we chose optimal reaction conditions for each SFEO, and the relevant products were subjected to polarized analysis. As illustrated in Figure 7, MCMBs generated at 3 h from i-b SFEO are abundant and of uniform diameter, which belongs to the Brooks−Taylor type.…”

Section: Energy and Fuelsmentioning

confidence: 99%

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

Zhang

et al. 2018

Energy Fuels

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The utilization of fluid catalytic cracking (FCC) slurry oil is a wide concern in modern refineries because of its poor processability. The present study used FCC slurry oil (SLO) as feedstock to produce mesocarbon microbeads (MCMBs) according to its rich aromatic content. A supercritical fluid extraction technique was adopted to remove the undesirable components and thus improve the mesophase development performance. Three different alkanes were used as the supercritical fluids, and the chemical composition of the derived fractions (SFEO) was analyzed. Four stages of mesophase development were observed in the carbonization process. The results showed that heavier feedstock reacted faster and reached the coalescence stage earlier, forming a bulk mesophase. MCMBs with a smooth surface and good morphology were prepared from iso-butane-derived SFEO at a reaction time of 3 h. The quality of the bulk mesophase produced from SFEOs was significantly improved in comparison to DQ SLO.

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“…Accordingly, corrosion rate reduction of magnetized HCl (as indicated in Table 3) can be explained on the basis of Clion activity and the extent of its contribution in acceleration metal dissolution (Chin and Nobe, 1972). It can also be considered that materials will have a new molecular arrangement because of magnetization (Imamura et al, 1978). Many researchers investigated the effects of the MF on the hydrogen-bonded structure and found that the number of hydrogen bonds increased (Cai et al, 2009).…”

Section: Gravimetric Studymentioning

confidence: 99%

Toward a mechanistic understanding of the magnetic field effect on N-80 carbon steel corrosion in aqueous HCl solution

Hashemizadeh

Ameri

2021

ACMM

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Purpose This study aims to describe the effect of magnetic field (MF) on the corrosion rate of N-80 carbon steel [N-80 carbon steel (CS)] in concentrated (12.5 Wt.%, 3.8 M) hydrochloric acid (HCl) using gravimetric weight loss (WL) measurements and potentiodynamic polarization (PDP) in various conditions at ambient temperature. Design/methodology/approach The effects of MF intensity, magnetization time and elapsed time on corrosion rate (CR) reduction (η) were studied. Findings The experimental results show that pre-magnetization of HCl sharply decreases the corrosion rate of N-80 carbon steel (CS) in acid. The maximum η was found to be 94%. The surface of CS was analyzed with scanning electron microscope in normal and magnetized acid. Originality/value To the best of the authors’ knowledge, no studies have delved into the effects of magnetization on the corrosion rate of CS in concentrated HCl solutions. All of the previous research studies deal with an external MF that is applied on the reaction cell, but the magnetization of fluid before coming in contact with CS is investigated for the first time. In the present work, the influence of MF on the corrosion rate of CS in HCl is illustrated using gravimetric WL and PDP methods. The effects of MF intensity as well as period of magnetization and elapsed time were verified in more than 35 tests.

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Orientation behavior of carbonaceous mesophase spherules having a new molecular arrangement in a magnetic field

Cited by 27 publications

References 3 publications

Disclination Structures in the Carbonaceous Mesophase

Disclination Structures in the Carbonaceous Mesophase

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

Toward a mechanistic understanding of the magnetic field effect on N-80 carbon steel corrosion in aqueous HCl solution

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