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. The work is subdivided into three tasks: (1) Project Planning, (2) Establish the fundamental mechanism of the selective coagulation process and determine the parameters that affect the process of separating coal from both the ash-forming minerals and pyritic sulfur, and (3) Conduct bench-scale process development testwork to establish the best possible method of separating the coagula from the dispersed mineral matter. The effect of pH on the energy of particle/bubble detachment has been measured with a single point surface force apparatus (Task 2.1); bench-scale coagulation experiments, coupled with contact angle and zeta potential measurements, are being used to determine hydrophobic interaction parameters for a Pittsburgh No. 8 coal sample (Task 2.2); and a population balance model of the hydrophobic coagulation process is under development (Task 2.3). A sample of Pittsburgh No. 8 coal has been received and is currently being characterized (Tasks 3.1 3.2), and the mixer required for Task 3.3 was designed and constructed. 4 refs., 7 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:
- 5692207
- Report Number(s):
- DOE/PC/90174-T1; ON: DE91011287
- Country of Publication:
- United States
- Language:
- English
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Development of the selective coagulation process
Development of the selective coagulation process. Fourth quarter technical progress report, July 1, 1991--September 30, 1991
Related Subjects
BITUMINOUS COAL
AGGLOMERATION
DEASHING
DESULFURIZATION
BENCH-SCALE EXPERIMENTS
BUBBLES
COAL PREPARATION
CONSTRUCTION
DESIGN
EFFICIENCY
MINERALS
MIXERS
PARTICLES
PH VALUE
PROGRESS REPORT
PYRITE
REMOVAL
RESEARCH PROGRAMS
SCANNING ELECTRON MICROSCOPY
SLURRIES
SURFACE POTENTIAL
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DISPERSIONS
DOCUMENT TYPES
ELECTRON MICROSCOPY
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MICROSCOPY
MIXTURES
POTENTIALS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)