Investigation of the effect of coal particle sizes on the interfacial and rheological properties of coal-water slurry fuels. Quarterly report number 2
Experiments were conducted to investigate the effect of particle size on CWS surface tension properties. Two different coal powder samples of different size ranges were obtained from a single source of coal from the Upper Elkhorn Seam through sieving. Anionic surfactants showed lowest CWS dynamic surface tension values when compared with nonionic or cationic surfactants in the previous study. Two anionic surfactants, DDBS-soft and 1840-x, were selected for this test. The surfactant concentration varied from 0 to 1.0% in weight while the coal loading remained at 40% for all the cases. A Du-Nouy ring tensiometer and a maximum bubble pressure tensiometer measured the static and dynamic surface respectively. The results show that both static and dynamic surface tensions tend to decrease with increasing coal particle sizes suspended in CWS fuels.
- Research Organization:
- Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-94PC94120
- OSTI ID:
- 10122481
- Report Number(s):
- DOE/PC/94120-T2; ON: DE95007909; BR: AA1505000; TRN: AHC29509%%54
- Resource Relation:
- Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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Investigation of the efect of the coal particle sizes on the interfacial and rheological properties of coal-water slurry fuels
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