期刊
FUEL PROCESSING TECHNOLOGY
卷 93, 期 1, 页码 13-17出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2011.09.007
关键词
Sonoelectrochemistry; Sonocavitation; Enhanced flotation; Desulfurization
资金
- Tarim University President Foundation [TDZKSS09006]
Enhanced desulfurizing flotation of high sulfur coal was investigated using the sonoelectrochemical method. The supporting electrolyte used in this process was calcium hydroxide and the additive was anhydrous ethanol. The effects of treatment conditions on desulfurization were studied by a single-factor method. The conditions include anhydrous ethanol concentration, sonoelectrolytic time, current density, and ultrasound intensity. For the coal sample with a particle size of -0.076 mm, the optimal experimental conditions achieved for anhydrous ethanol. sonoelectrolytic time, current density, and ultrasound intensity are 2.1 mol/L, 20 min, 15x10(-3) A/cm(2), and 1.2 W/cm(2), respectively. Optimal conditions cause a sulfur reduction of up to 75.4%. The raw and treated coals were analyzed by infrared spectroscopy and a chemical method. Pyritic sulfur, organic sulfur, and ash are partially removed. Compared with enhanced flotation by ultrasound or electrochemistry, desulfurizing flotation of high sulfur coal by sonoelectrochemistry is an effective technology. (C) 2011 Elsevier B.V. All rights reserved.
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