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The influence of an addition of an anthracitic coal and an anthracite on the properties and the structure of the multicomponent blends and the resultant cokes

Bratek W., Gerus-Piasecka I., Bratek K.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 1

9--13

EN

An influence of different rank anthracites (an anthracitic coal and an anthracite) as the leaning components of blends on the properties and the structure of blends and the resultant cokes was studied. It was stated that the best addition of the anthracitic coal or the anthracite to the mixture consisted of gas-coking coal (ICC 633) and orthocoking coals (ICC 535 and 435) is 10 - 15%.

2

High softening point pitches produced by air-blowing of Qi-free coal-tar derived precursors

Machnikowski J., Gerus-Piasecka I., Kubica K., Machnikowska H.

Polish Journal of Chemical Technology

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2001

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Vol. 3, nr 2

11-16

EN

Modified pitches with the softening point of about 220°C were prepared by air-blowing at 300°C of Qi-free pitches from commercial "light" and "heavy" coke-oven tars. The effect of parent tar nature and Qi-free tar distillation conditions on air-blowing behaviour was studied using solvent and extrographic fractionation, elemental analysis, 1H NMR, and contact angle measurement. The kinetics and the mechanism of the mesophase formation on isothermal treatment at 450°C and the optical texture of semi-cokes were studied by polarized-light optical microscopy. Under these conditions totally isotropic pitches of considerably enhanced coking yield and TI content with very little change in elemental composition produced. The air-blowing accelerated the formation of mesophase on carbonization without marked affecting the mesophase units growth and the flow type optical texture of semicoke. The pitch from Qi-free "heavy" tar distilled under the reduced pressure was selected as most suitable potential precursor for isotropic carbon fibers.

3

Wpływ procesu uwodornienia na właściwości paków węglowych

Kaczmarska H., Więcek I., Surygała J., Gerus-Piasecka I., Kozłowski A.

Karbo

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2001

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Nr 3

84-87

PL

Badano wpływ procesu uwodornienia paków węglowych, otrzymanych ze smoły surowej i oczyszczonej, na właściwości uzyskanych produktów - paków modyfikowanych. Uwodornienie prowadzono przy użyciu tetraliny i 1,2,3.4-tctrahydrochinoliny (THQ). Stwierdzono, że stopień uwodornienia paku zależy głównie od typu rozpuszczalnika wodorodo-norowego. Wykazano, że uwodornione paki są niskoaromatyczne i mniej stabilne termicznie (wyższa zawartość części lotnych, mniejsza wydajność tworzenia pólkoksów) niż paki wyjściowe. Uwodornienie paków węglowych polepszyło teksturę optyczną otrzymanych z nich koksów.

EN

The influence was investigated of hydrogenation processes of coal-tar received from raw and rectified tars upon the properties of the feed products - modified pitches. Hydrogenation was done with the Ptetraline and 1,2,3,4- tetrahydroquinoline (THQ). It has been de-Bed that a degree of pitch hydrogenation depends mainly on the type of hydrogen donor solvent. It has been pointed out that hydrogenated pitches are low aromatic and less thermally stable ( higher content of Be matter, less yield in formation of semi-cokes) than initial pit-Btydrogenation of coal-tar pitches improved optical texture of cokes produced from them.