The effect of molten caustic leaching on a structure of anthracite
- Korea Inst. of Energy Research, Taejon (Korea, Republic of)
- Korea Inst. of Geology, Mining and Materials, Taejon (Korea, Republic of)
Korean anthracite and imported bituminous coal were treated according to the molten caustic leaching (MCL) process and the changes in their organic structure and combustion characteristics sere investigated. This investigation was conducted through functional group analysis, vitrinite reflectance measurements, maceral and TGA analysis. Results of analysis showed that the highly reactive aliphatic hydrocarbons linked with aromatic rings decreased and the vitrinite reflectance increased after treatment. These are changes observed when carbonization occurred. However, the results of observation of maceral surfaces showed that the surface of the organic groups were severely collapsed and the anisotropy, which should increase with carbonization, decreased. It was found that the changes in the combustion temperature and the reactivity after treatment with MCL were attributed to the physical changes on the surface of organic groups rather than to the chemical changes such as break down in the organic groups.
- OSTI ID:
- 257088
- Report Number(s):
- CONF-950952-; TRN: IM9631%%294
- Resource Relation:
- Conference: 12. annual international Pittsburgh coal conference, Pittsburgh, PA (United States), 11-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Twelfth annual international Pittsburgh coal conference: Proceedings. Coal -- Energy and the environment; PB: 1248 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTHRACITE
MORPHOLOGICAL CHANGES
COMBUSTION PROPERTIES
MOLECULAR STRUCTURE
GRAVIMELT PROCESS
BITUMINOUS COAL
THERMAL GRAVIMETRIC ANALYSIS
DEASHING
SODIUM HYDROXIDES
ACTIVATION ENERGY
SURFACE AREA
PARTICLE SIZE
CALORIFIC VALUE
ABSORPTION SPECTRA
REFLECTIVITY
EXPERIMENTAL DATA