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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18905

Title: Changes and removal of different sulfur forms after chemical desulfurization by peroxyacetic acid on microwave treated coals
Authors: MESROGHLI, Shahin
Jorjani, E.
Noaparast, M.
Issue Date: 2015
Citation: FUEL, 154, p. 59-70
Abstract: High sulfur coal sample from C1 seam in Tabas mine (Iran) was studied. The effect of microwave pre-irradiation followed by a peroxyacetic acid (PAA) desulfurization on sulfur forms was investigated by atmospheric pressure-temperature-programmed reduction (AP-TPR) method. Implementing microwave irradiation at 300 W for 2 min resulted in a maximum total sulfur and organic sulfur reduction by PAA of about 63% and 49%, respectively. Pyrite reduction in the microwave treated - PAA desulfurized samples is more than 84% on all studied samples. Pre-irradiation improved pyrite removal by PAA around 21%. Organic sulfur alteration after PAA desulfurization was discussed based on recorded m/z 34 (H2S+) AP-TPR profile changes, qualitatively and partly quantitatively. Based on the m/z 48 and 64 (SO+, SO2+) AP-TPR profiles, organic sulfate and also minor amounts of sulfones and sulfoxides in the PAA treated samples have been noticed. AP-TPR off-line coupled with TD-GC/MS gives additional proves of the formation of oxidized sulfur compound present by PAA desulfurization and for a de-methylation reaction mechanism because of the pre-irradiation treatment. (C) 2015 Elsevier Ltd. All rights reserved.
Notes: [Mesroghli, Sh; Jorjani, E.] Islamic Azad Univ, Dept Min Engn, Tehran Sci & Res Branch, Tehran, Iran. [Yperman, J.; Vandewijngaarden, J.; Reggers, G.; Carleer, R.] Hasselt Univ, CMK, Res Grp Appl & Analyt Chem, B-3590 Diepenbeek, Belgium. [Noaparast, M.] Univ Tehran, Sch Min Engn, Tehran, Iran.
URI: http://hdl.handle.net/1942/18905
DOI: 10.1016/j.fuel.2015.03.058
ISI #: 000353893200008
ISSN: 0016-2361
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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