Influence of primary QI and particulate matter on pitch carbonizations☆

Kuo, K.; Marsh, H.; Broughton, D.

doi:10.1016/0016-2361(87)90016-0

Cited by 28 publications

(9 citation statements)

References 9 publications

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“…The pyrolysis of petroleum residue in the presence of solid oxides has also been studied [17][18][19][20]. Some of them hindered hydrogen transference and lowered the size of optical textures (SiO 2 -Al 2 O 3 , MoO 3 -TiO 2 , Al 2 O 3 , Silica gel), while others such as fusible SeO 2 improve hydrogen transfer [20].…”

Section: Introductionmentioning

confidence: 99%

Preparation of mesophase pitch doped with TiO2 or TiC particles

Ramos-Fernández¹,

Escandell²,

Rodriguez-Reinoso³

2007

Journal of Analytical and Applied Pyrolysis

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Section: Introductionmentioning

confidence: 99%

Preparation of mesophase pitch doped with TiO2 or TiC particles

Ramos-Fernández¹,

Escandell²,

Rodriguez-Reinoso³

2007

Journal of Analytical and Applied Pyrolysis

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“…While the presence of inert obstructions to mesophase development is known to increase the interlayer spacing, specifically primary QI [2] and alkali metal carbonates [3], the influence of the catalyst barrier in the current study varies in that the iron acts as a graphitisation catalyst thus lowering the interlayer spacing.…”

Section: The Insert Shows the Split Of 3 Overlapping Peaks (Indicatedmentioning

confidence: 97%

“…However, while previous work has studied the effect of fine iron oxide powders (0.1-1.0 µm) on the microstructure, the current study evaluates the effect of a commercial catalyst with a larger particle size distribution (0.5-78 µm) on the carbon microstructure. This study also considers the effect of the comparatively large catalyst size in presenting a physical barrier to the development of flow domains within the carbon microstructure (as has been reported in studies evaluating the effect of other solids on the microstructure), specifically primary QI [2] and alkali metal carbonates [3].…”

Section: Introductionmentioning

confidence: 99%

The effect of an iron oxide catalyst (Fe3O4) on the characteristics of Waxy Oil coke

Clark

Rand

Hayes

et al. 2012

Fuel

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A study was conducted on four commercial Waxy Oil green cokes with varying catalyst (Fe 3 O 4 ) concentrations (ash content: 1.84-11.18%), to determine the effect thereof on the structural characteristics of calcined (1400 °C) and pre-graphitised (2000 °C) cokes. An increase in the catalyst content of the coke shows a substantial detrimental affect on the overall anisotropy of the carbon microstructure. The catalyst (with a particle size distribution between 0.5 µm and 78 µm) was found to present a physical barrier around which the anisotropic flow domains formed. At higher catalyst concentrations the catalyst dominates the carbon microstructure; however, there is still evidence of flow patterns albeit with a shorter range. XRD powder data and Raman spectroscopy provide evidence of multiphase graphitisation in both the calcined coke and pre-graphite. The crystal development of the calcined coke is dominated by catalytic graphitisation and that of the pre-graphite showed a greater dependence on thermal graphitisation. This is the first scientific study of the effect of catalyst concentration on the characteristics of this novel coke and proves the disingenuous comparability thereof with a highly anisotropic coke (e.g. needle coke).

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“…A number of methods for manufacturing of the mesophase microbead have been introduced [13][14][15][16][17][18][19][20][21][22]. However, an important factor in producing this microbead was to decrease the distribution of particle sizes and high yield.…”

Section: Introductionmentioning

confidence: 99%

Formation of Isotropic Carbon Matrix in Carbon/Carbon Composites Derived from Pitch

Ahn¹,

Park²,

Joo³

2010

Carbon letters

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To manufacture a carbon/carbon composite the coal tar pitch was used as the matrix precursor and the PAN (polyacrylonitrile)-based carbon fiber was used as the reinforcing material to weave 3-directional preform. For pressure carbonization HIP equipment was used to produce a maximum temperature of 1000 o C and a maximum pressure of 100 MPa. The carbonization was induced by altering the dwell temperature between 250 o C and 420 o C, which is an ideal temperature for the moderate growth of the mesophase nucleus that forms within the molten pitch during the pressure carbonization process. The application of high pressure during the carbonization process inhibits the mesophase growth and leads to the formation of spherical carbon particles that are approximately 30 nm in size. Most particles were spherical, but some particles were irregularly shaped. The spread of the carbon particles was larger on the surface of the carbon fiber than in the interior of the matrix pocket.

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Influence of primary QI and particulate matter on pitch carbonizations☆

Cited by 28 publications

References 9 publications

Preparation of mesophase pitch doped with TiO2 or TiC particles

Preparation of mesophase pitch doped with TiO2 or TiC particles

The effect of an iron oxide catalyst (Fe3O4) on the characteristics of Waxy Oil coke

Formation of Isotropic Carbon Matrix in Carbon/Carbon Composites Derived from Pitch

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