Effect of Mechanochemical Treatment on Supramolecular Structure of Brown Coal
PETER N. KUZNETSOV, LYUDMILA I. KUZNETSOVA, ALEXANDER N. BORISEVICH and NINA I. PAVLENKO
Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences,
Ul. K. Marxa 42, Krasnoyarsk 664049 (Russia) E-mail: kuzpn@krsk.info
Pages: 715-721
Abstract
Mechanical treatment of brown coal in a centrifugal planetary mill causes partial destruction of cross-linking in the organic mass, mainly oxygen-containing groups. As a result, substantial changes occur in the molecular structure, the amount of graphite-like phase decreases, a sharp increase in the flexibility of macromolecular chains is observed, the rate of penetration of the THF molecules into the organic matter, its swelling ability and the yield of soluble substances. Transport of THF molecules in mechanically treated coal occurs mainly due to relaxation vibrations of the macromolecular chains.
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