Physicochemical principles of coal-water-slurry gasifier feedstock

Technical Report · Sun Sep 01 00:00:00 EDT 1991

OSTI ID:5304984

Dooher, J; Malicki, N; Trudden, J ^[1]

---

1. Adelphi Univ., Garden City, NY (United States). Dept. of Physics

The objective of this effort is to develop a phenomenological model describing slurry flow. Researchers analyzed and verified a geometric model by comparison with viscometric properties of glass beads dispersed in viscous calibration fluid. This geometric model was extended to include particle agglomeration and breakup and the effect of trapped water. This elaborated model was based on a test program in which slurries were prepared with seven coals varying in concentration and zeta potential. The slurries were examined for rheology over a wide range in shear rate (50--40,000 1/s), tendency to agglomerate, agglomerate size and strength, and shape factor determination. The test program results show that the flow properties of coal slurries are directly related to the characteristics of coal agglomeration, which in turn are related to coal properties. The underlying science in the analysis of coal slurry flow reduces to the analysis of the effective ratio of agglomerate formation to agglomerate breakup. 10 refs., 19 figs., 15 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Adelphi Univ., Garden City, NY (United States). Dept. of Physics
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 5304984
• Report Number(s): EPRI-EAR/GS-7467
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
FUEL SLURRIES
RHEOLOGY
AGGLOMERATION
CHEMICAL PROPERTIES
COAL
COAL GASIFICATION
FUNCTIONAL MODELS
MATHEMATICAL MODELS
MOISTURE
PARTICLE SIZE
PHYSICAL PROPERTIES
PROGRESS REPORT
SHEAR
STRUCTURAL MODELS
SUSPENSIONS
SWELLING
VISCOSITY
WATER
CARBONACEOUS MATERIALS
DISPERSIONS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
HYDROGEN COMPOUNDS
MATERIALS
MIXTURES
OXYGEN COMPOUNDS
SIZE
SLURRIES
THERMOCHEMICAL PROCESSES
010600* - Coal
Lignite
& Peat- Properties & Composition