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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 | 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. 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. | Document URI: | http://hdl.handle.net/1942/4380 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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