Modification of Native Graphite from Russian and Ukrainian Deposits by Intercalation and Flash-Pyrolysis
BORIS N. KUZNETSOV1, MAXIM L. SHCHIPKO1, TAMILA P. MILOSHENKO1, ANATOLIY M. ZHIZHAEV1, ALEXEY V. RUDKOVSKIY1, MIKHAIL V. SAVOSKIN2, ALEXEY M. YAROSHENKO2, SVETLANA B. LYUBCHIK2 and TATIANA G. SHENDRIK2
Pages: 503-509
Abstract
The investigation of obtaining thermoexpanded graphite from native graphite samples of four deposits in Russia and Ukraine involving various procedures of intercalation and pyrolysis is described. It is established that the most promising raw material for the production is graphite from Zavalye (Ukraine) and Kyshtym (Russia). Intercalation of these samples with chloric, nitric, acetic acids and chromic anhydride followed by thermal treatment in the steady mode allows obtaining carbon materials with the bulk density about 1 kg/m3. It is demonstrated that pyrolysis of the same intercalated samples in a flow reactor results in obtaining carbon materials with substantially smaller specific volume, but they possess a number of technological advantages in comparison with those obtained under steady conditions.
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