The oxygen and its influence on coal surface

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F08%3AA0900QQD" target="_blank" >RIV/61988987:17310/08:A0900QQD - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
The oxygen and its influence on coal surface
Original language description
The zeta potential of different kinds of carbonaceous materials was studied with respect to the content of oxygen. Samples of sub-bituminous, bituminous, altered bituminous coal, activated carbon and graphite were used. It was found, that zeta potentialof coal samples decreases to more negative values with increasing native amount of oxygen. This trend was confirmed on samples of partially oxidized coal, for which the zeta potential decreases with increasing temperature of oxidation and increasing amount of chemisorbed oxygen. Similar relation was found for samples of graphite oxidized by nitric acid. A surface of carbonaceous materials was also modified by surfactant - SDS (sodium dodecyl sulphate). We followed relationship between adsorbed amount ofSDS and changes of the zeta potential.
Czech name
Kyslík a jeho vliv na povrch uhlí
Czech description
Různé vzorky uhlíkatých materiálů byly studovány s ohledem na obsah kyslíku v jejich hmotě. Měřen byl zeta potenciál neupravených materiálů a vzorků upravených tepelnou oxidací, oxidací kyselinou dusičnou a modifikací anionaktivním tenzidem. Zeta potenciál obecně klesá s rostoucím obsahem kyslíku (kyslíkatých skupin).

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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