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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/12995

Title: Biodesulphurized low rank coals appraisal: Initial, treated, their bitumens and solid residues
Authors: MARINOV, Stefan
GONSALVESH, Lenia-Nezaet
Groudeva, V.
Gadjanov, P.
Issue Date: 2011
Citation: FUEL PROCESSING TECHNOLOGY, 92 (12), p. 2328-2334
Abstract: Low rank high sulphur containing Bulgarian coals are biodesulphurized on laboratory scale. Treatment of Maritza East lignites by bacteria Pseudomonas putida B2 (PP) attained 44% total desulphurization, while biodesulphurization of Bobov dol subbituminous coal by Acidothiobacillus ferrooxidans F3 (AFe) demonstrated 14%. The caloric values were slightly altered, 0.8% for lignites and 4.7% for subbituminous coal. Bitumens from the initial and biotreated coals and fractions of their neutral oils are studied. For subbituminous coal treated by AFe F3 bacteria increase in polar diterpenoids is registered by GC/MS. Concerning the set of polar diterpenoids produced during lignites treatment by PP B2 their relative contents are comparable with the ones for initial lignites. GC/MS analyses of soluble products from both coals did not give any information for sulphur containing compounds. Temperature programmed reduction coupled "on-line" with mass spectrometry (AP-TPR/MS) and its "off-line" TD-GC/MS version are used for sulphur tracking in solid residues after bitumen extraction. Quantitative interpretation of TD-GC/MS profiles revealed changes in organic sulphur compounds, elemental sulphur and SO(2). Results gave us ground to conclude that AFe F3 bacteria decrease pyritic sulphur content and slightly oxidize coal organic matter while PP B2 bacteria influence lignite organic matter and also affect pyritic sulphur. 2011 Elsevier B.V. All rights reserved.
Notes: Stefanova, M (reprint author), Bulgarian Acad Sci, Inst Organ Chem, Bl 9, Sofia 1113, Bulgaria. [Marinov, S. P.; Stefanova, M.; Gonsalvesh, L.] Bulgarian Acad Sci, Inst Organ Chem, Sofia 1113, Bulgaria. [Groudeva, V.] Sofia Univ St Kliment Ohridski, Fac Biol, Sofia 1164, Bulgaria. [Gadjanov, P.] Tech Uniers Sofia, Thermal & Nucl Power Eng Dept, Sofia 1756, Bulgaria. [Carleer, R.; Yperman, J.] Hasselt Univ, CMK, Res Grp Appl Anal Chem, B-3590 Diepenbeek, Belgium. maia@orgchm.bas.bg
URI: http://hdl.handle.net/1942/12995
DOI: 10.1016/j.fuproc.2011.07.022
ISI #: 000297873500017
ISSN: 0378-3820
Category: A1
Type: Journal Contribution
Validation: ecoom, 2012
Appears in Collections: Research publications

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