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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/4380

Title: Study of silica immobilized sulphur model compound as calibrant for AP-TPR study of oxidized coal samples
Authors: VAN AELST, Joke
YPERMAN, Jan
FRANCO, Dirk
VAN POUCKE, Lucien
Buchanan, A.C.
Britt, P.F.
Issue Date: 2000
Publisher: AMER CHEMICAL SOC
Citation: Energy & fuels, 14(5). p. 1002-1008
Abstract: Desulfurization of coal prior to combustion has developed the need for an accurate technique to determine which sulfur groups are present before and after chemical treatment. Athmospheric pressure-temperature programmed reduction (AP-TPR) is a technique that can determine the sulfur distribution by using model compounds as calibrants. This study deals with a series of model compounds for oxidized sulfur functionalities. It is proven by AR-TPR and AP-TPR-MS that the sulfur groups of these model compounds are decomposed and that decomposition products (SO/SO2) are only partially reduced. Diaryl sulfoxides and sulfones are found to be more stable than their aryl alkyl-substituted counterparts, and sulfones are more stable than the structurally related sulfoxides. Sulfates are generally found to be the most stable oxidized forms of sulfur.
URI: http://hdl.handle.net/1942/4380
ISSN: 0887-0624
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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