Abstract


LOW-TEMPERATURE PROCESSING OF COLOMBIAN COAL IN EXPERIMENTAL RETORT

V. YEFIMOV
I. PULEMYOTOV
S. DOILOV
Institute of Oil Shale
Tallinn Technical University
12 Järveküla St., Kohtla-Järve
30198 Estonia

Processing Colombian coal in experimental retort demonstrated a number of specific features of the process:
      *  Normal downward passage of the initial material through the retort was possible only by dry extraction of the solid residue (semicoke) from the retort;
      *   Low-temperature retorting proceeds smoothly, the residual content of volatiles is readily reduced from 36 %   to as low as 2 %   producing paraffinic oil and high calorific low ash low sulfur semicoke;
      * The Colombian low ash coal may be regarded as an attractive feed for retorting in low-temperature zero-waste technology.

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