Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2924
Title: Study of silica-immobilized sulfur model compounds as calibrants for the AP-TPR study of oxidized coal samples
Authors: VAN AELST, Joke
YPERMAN, Jan 
FRANCO, Dirk 
VAN POUCKE, Lucien 
Buchanan, AC
Britt, PF
Issue Date: 2000
Publisher: AMER CHEMICAL SOC
Source: 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. Atmospheric 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 AP-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.
Notes: Limburgs Univ Ctr, IMO, Mat Chem Div, B-3590 Diepenbeek, Belgium. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA.Yperman, J, Limburgs Univ Ctr, IMO, Mat Chem Div, Univ Laan, B-3590 Diepenbeek, Belgium.
Document URI: http://hdl.handle.net/1942/2924
DOI: 10.1021/ef000019n
ISI #: 000089483700008
Category: A1
Type: Journal Contribution
Validations: ecoom 2001
Appears in Collections:Research publications

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