Demineralization of a UK bituminous coal using HF and ferric ions

Wu, Zhiheng and Steel, Karen M. (2007) Demineralization of a UK bituminous coal using HF and ferric ions. Fuel, 86 14: 2194-2200. doi:10.1016/j.fuel.2007.02.038

Author Wu, Zhiheng
Steel, Karen M.
Title Demineralization of a UK bituminous coal using HF and ferric ions
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
Publication date 2007-09
Sub-type Article (original research)
DOI 10.1016/j.fuel.2007.02.038
Volume 86
Issue 14
Start page 2194
End page 2200
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Abstract UK bituminous coal has been used to study dernineralization by two-stage chemical leaching. The first-stage uses hydrofluoric acid (HF) at 65 degrees C and reduces the ash content from 5.30 wt%/ to 1.37 wt% by mainly removing Al and Si containing minerals. Subsequent leaching by ferric ions decreases the ash content further to 990 ppm by removing most of the pyrite and fluorides formed during the HF leaching. Calorific value of the coal shows no change following leaching, which suggests no oxidation is occurring to the coal carbonaceous matrix. The mercury and sulfur contents after the two-stage leaching sequence decrease by 40% and 26%, respectively.
Keyword Coal demineralization
Hydrofluoric acid
Ferric ions
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Engineering, Architecture and Information Technology Publications
School of Chemical Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 10 Jul 2009, 16:10:57 EST by Dr Karen Steel on behalf of School of Chemical Engineering