98/00040 Structural study of Ostrava-Karvina bituminous coals

• Publisher: Elsevier Science
• Year: 1998
• Weight: 204 KB
• Volume: 39
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(97)85320-9

✦ Synopsis

further drying leads to intercalation compound 'coal-MOH' formation. This work has demonstrated that reorganization of over-molecular structure for all investigated coals is found. Emphasis is put on brown coal (Cd"' 73.6%) and anthracite (Cd"' 95.2%) as extreme representatives of rank coals.

98100038

Structural comparison of hazardous and nonhazardous coals based on gas sorption experiments

Lakatas, _I. er al. DGMK Tagungsber., 1997, 9702, (Proceedings ICCS '97, Volume I), 79-82. COz and CxHx sorption at ambient temperature was compared and the results were used for characterizing the difference of the structure of hazardous and non-hazardous coals. Hazardous coals were found to be more microporous or contain more closed pores than non-hazardous ones, but this difference could not be enlarged and attributed to one petrographical component by producing the density fractions. Gas sorption isobars (N?, CH.,, CxHx) are proposed to make a distinction between fine pure structure of coals.