Structural characterization of coal-tar and petroleum pitches

Kershaw, John R.; Black, K. J. T.

doi:10.1021/ef00039a014

Cited by 87 publications

(51 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, oxidative treatments directly attach carboxylic groups as well as other oxygen-bearing groups, such as hydroxyl, carbonyl and ester groups to the end and/or defect side-walls of CNTs. The strong oxidation process results in opening the tube tip and shortening of the tube, increasing the chance of the interaction between CNTs and pitch molecular [49]. In Ingo Alig's study on CNTs network in polymer melts [50], the local CNT-polymer interaction was found to immobilize the polymer chains in the amorphous regions.…”

Section: Effect Of Sonication On the Microstructures Of The Activatedmentioning

confidence: 99%

Effect of sonication and hydrogen peroxide oxidation of carbon nanotube modifiers on the microstructure of pitch-derived activated carbon foam discs

Gao

Villacorta

et al. 2017

Carbon

View full text Add to dashboard Cite

We used carbon nanotubes (CNTs) as modifying particles and potassium hydroxide as a porogen to prepare mesoporous pitch-derived activated carbon discs (ACD) with high surface areas. The parameters investigated in this study included the concentration of CNTs (1%, 2%, 3.5% and 5%), the dispersion of the CNTs in the pitch using a 750 W sonic probe, the oxidation of the CNTs with H2O2, and the aspect ratio of the CNTs. The highest surface area ACD was obtained with 2 % oxidized CNTs dispersed in the pitch with the ultrasonic probe (ACD-2%-SO, SBET = 2089 m 2 •g-1). The ACDs prepared with the sonic probe and with 2 %wt or more of raw and oxidized CNTs exhibited larger mesopore volumes than those ACDs prepared with 1 % CNTs. A series of quench tests performed during the foaming process by withdrawal of the carbon from the tube furnace at 673 K, 773 K and 873 K revealed that mesopores in ACD develop at temperatures ranging from 773 K to 873 K, whereas micropores formed between 873 K and 1073 K. The adsorption capacities of N2 and CO2 on ACD-2%-SO were measured with a gravimetric apparatus at 298 K and 303 K at pressures up to 4000 kPa. The uptake of CO2 on ACD-2%-SO at a temperature of 298 K was 3.33 mol/kg at 100 kPa and 11.51 mol/kg at 3496 kPa.

show abstract

Section: Effect Of Sonication On the Microstructures Of The Activatedmentioning

confidence: 99%

Effect of sonication and hydrogen peroxide oxidation of carbon nanotube modifiers on the microstructure of pitch-derived activated carbon foam discs

Gao

Villacorta

et al. 2017

Carbon

View full text Add to dashboard Cite

show abstract

“…The structural characterization of petroleumderived products has been reported in several reports [9][10][11][12][13] using these analysis methods. The concept of an "average structural" has been proposed by Kershaw and Black [13] to represents asphaltenes because of its complexity and broader molecular weight distribution.…”

Section: Introductionmentioning

confidence: 99%

Characterization of asphaltene isolated from low-temperature coal tar

Sun

Liu

et al. 2015

Fuel Processing Technology

View full text Add to dashboard Cite

“…The TI and QI contents of the reformed pitches were 18.2%-29.7% and 0.47%-0.76%, respectively. The QI value was relatively low compared to that of coal tar pitch due to the lower number of aromatic rings per molecule [21]. Both the QI and TI values increased proportionally with increasing absorbed doses in the range of 20-40 kGy.…”

Section: Softening Point Of the Reformed Pitchmentioning

confidence: 85%

Novel reforming of pyrolized fuel oil by electron beam radiation for pitch production

Jung¹,

Park²,

Kim³

et al. 2014

Carbon letters

View full text Add to dashboard Cite

Pyrolized fuel oil (PFO) was reformed by novel electron beam (E-beam) radiation, and the elemental composition, chemical bonds, average molecular weight, solubility, softening point, yields, and density of the modified patches were characterized. These properties of modified pitch were dependent on the reforming method (heat or E-beam radiation treatment) and absorbed dose. Aromaticity (F a ), average molecular weight, solubility, softening point, and density increased in proportion to the absorbed dose of E-beam radiation, with the exception of the highest absorbed dose, due to modification by free radical polymerization and the powerful energy intensity of E-beam treatment. The H/C ratio and yield exhibited the opposite trend for the same reason. These results indicate that novel E-beam radiation reforming is suitable for the preparation of aromatic pitch with a high β-resin content.

show abstract

Structural characterization of coal-tar and petroleum pitches

Cited by 87 publications

References 0 publications

Effect of sonication and hydrogen peroxide oxidation of carbon nanotube modifiers on the microstructure of pitch-derived activated carbon foam discs

Effect of sonication and hydrogen peroxide oxidation of carbon nanotube modifiers on the microstructure of pitch-derived activated carbon foam discs

Characterization of asphaltene isolated from low-temperature coal tar

Novel reforming of pyrolized fuel oil by electron beam radiation for pitch production

Contact Info

Product

Resources

About