Development of the selective coagulation process
The overall objective of this project is to develop an economical method of producing low-ash and low-sulfur coals using the selective coagulation process. Work is subdivided into three tasks: (1) project planning; (2) studies of the fundamental mechanism of the selective coagulation process and the parameters that affect the process of separating coal from both the ash-forming minerals and pyritic sulfur; and (3) bench-scale process development testwork to establish the best possible methods of separating the coagula from the dispersed mineral matter. During the second quarter, the effects of surface hydrophobicity, pH and KCI concentrations on the interaction energies of attachment and detachment have been evaluated; hydrophobic interaction parameters were determined for oxidized and unoxidized; Elkhorn No. 3 seam coal samples and then compared with calculations based on the extended DLVO theory; and work continued on the population balance model of the hydrophobic coagulation process. A sample of Elkhorn No. 3 seam coal was obtained and is currently being characterized; a particle size monitor has been received; and work has begun on enhancing the separation of coagula (Task 3.4). 14 figs.
- Research Organization:
- Virginia Center for Coal and Minerals Processing, Blacksburg, VA (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC22-90PC90174
- OSTI ID:
- 5540401
- Report Number(s):
- DOE/PC/90174-T2; ON: DE91014722
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
DEASHING
DESULFURIZATION
ASH CONTENT
PH VALUE
POTASSIUM CHLORIDES
PROGRESS REPORT
SEPARATION PROCESSES
SULFUR CONTENT
SURFACE PROPERTIES
ALKALI METAL COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
MATERIALS
POTASSIUM COMPOUNDS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010600 - Coal
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& Peat- Properties & Composition