Experiment for preparing coal-based low-ash activated carbon

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:257062

Zuna, W ^[1]

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1. Beijing Graduate School (China)

Coal of certain cleanliness is essential for preparing coal-based low-ash activated carbon. Such premium coal is scarce in nature and coal cleaning is consequently a necessary process. To have a coal-based activated carbon containing less than 2% ash, coal concentrate with ash content of 0.5 to 0.8% is required. Extent of ash reduction is higher for coal with higher volatile matter content. This implies the removal from the coal matrix of mineral matters in micronized size. Coal can be processed to any degree of cleanliness by chemical methods. However, production cost of chemical process is in most cases economically unacceptable. This physical coal cleaning experiment includes: ultra-fine wet grinding to liberate the minute mineral matters in coal; separation of ultra-fine ground particles by difference in surface character with the addition of surfactants. Efforts were made to attain economically acceptable energy and reagent consumption. Fusinite in hard coal is often pronounced in porosity but is less hydrophobic. It was found that coal concentrate of ultra-low ash with a high degree of fusinite enrichment is possible in some cases. Activated carbons were prepared in the laboratory with physically cleaned coals and their properties were measured.

• OSTI ID: 257062
• Report Number(s): CONF-950952--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACTIVATED CARBON
ASH CONTENT
CHEMICAL PREPARATION
COAL
COAL PREPARATION
COMMINUTION
DEASHING
MACERALS
SURFACE PROPERTIES