Rheological characterization of the coal/oil/water slurries and the effect of polymer
Conference
·
OSTI ID:41565
- Univ. of Kansas, Lawrence, KS (United States)
Three-phase slurries provide a viable and immediate replacement for residual oil that is being used by existing boilers which are not capable of firing coal directly. This alternative fuel can be used economically, and has a great potential in terms of user convenience and environmental acceptability. Coal slurries have the same burning, heating, handling, and storage characteristics as fuel oil. Coal slurry technology often faces with the problem of instability and unfavorable rheological properties, such as high viscosity problems during processing and pumping. In order to overcome instability water as well as chemical additives have been introduced to coal slurries. The industrial application of coal slurries requires full knowledge of their flow behavior. Viscosity is the main parameter which determines the flowing, pumping, burning, and storing requirements. The rheological properties are influenced by many factors such as coal concentration, coal particle size, temperature, nature of the medium phase, chemical additives, and moisture contents. Experimental data on three-phase slurries in the literature are very scattered. Most of the published data are on coal/oil or water/oil slurries. Generally, coal slurries are non-Newtonian and mostly exhibit pseudoplastic behavior.
- OSTI ID:
- 41565
- Report Number(s):
- CONF-940320--
- Country of Publication:
- United States
- Language:
- English
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